A university wants to schedule the classrooms for final exams. The attributes are given below:
course : course id, name, and department
section : section id, enrollment, and dependent as a weak entity set on course
room : room number, capacity, and building
exam: course id, section id, room number, and time.
1) Determine the relationships among these entity sets. Clearly specify the arity, the attributes, and the mapping cardinality of these relationships.
2) Construct an E-R diagram to for the scheduling system.
Answers
Answer:
See explaination
Explanation:
Clearly the entities are as follows:-
Course
Section
Room
Test
The relationship among entities are as follows:-
Course has Section
Test is conducted for Course
Test is conducted in Section
Test is conducted in Room
Attributes of each entities are as follows:-
Course (CourseID, Name, Department)
Section (SectionID, Enrollment)
Room (RoomNumber, Capacity, Building)
Test (Time)
Section is a week entity as, there may be same sections for different courses, therefore section uses the primary key of course entity as foreign key.
Also entity Test is dependent upon the entities Room,Section and Course, therefore primary keys of these entities will be used as foreign key in the Test entity.
Check attachment for the ER diagram
Related Questions
after turning the volume all the way up on the speakers you still can't hear any sound which of the following should be your the next step
Answers
Answer:
check if its pluged in
Explanation:
Write a class called DisArray with methods to convert a 1-dimensional array to a 2-dimensional array. The methods' name should be convert2D. You should create methods to convert int[] and String[], that can be tested against the following class. Your convert2D methods should choose the closest possible square-ish size for the 2D array. For example, if your input array is [10], its 2D conversion should be [3][4] or [4][3] -- you decide if you want to favor rows over columns. Your method should place the elements of the one-dimensional array into the two-dimensional array in row-major order, and fill the remaining elements with 0 (for integer arrays) or null (for String arrays). The process of filling unused elements with 0 or null is called padding. If the input array's length is a perfect square, e.g., [16], then your output should a square array, i.e., [4][4]. For any other size, your objective is to minimize the number of padded elements. For example, if your input is [10] you should opt for a [3][4] array instead of a [4][4]. The former will have only 2 padded elements; the latter 6.
Answers
=======================================================
//Class header definition
public class DisArray {
//First method with int array as parameter
public static void convert2D(int[] oneD) {
//1. First calculate the number of columns
//a. get the length of the one dimensional array
int arraylength = oneD.length;
//b. find the square root of the length and typecast it into a float
float squareroot = (float) Math.sqrt(arraylength);
//c. round off the result and save in a variable called row
int row = Math.round(squareroot);
//2. Secondly, calculate the number of columns
//a. if the square of the number of rows is greater than or equal to the
//length of the one dimensional array,
//then to minimize padding, the number of
//columns is the same as the number of rows.
//b. otherwise, the number of columns in one more than the
// number of rows
int col = ((row * row) >= arraylength) ? row : row + 1;
//3. Create a 2D int array with the number of rows and cols
int [ ][ ] twoD = new int [row][col];
//4. Place the elements in the one dimensional array into
//the two dimensional array.
//a. First create a variable counter to control the cycle through the one
// dimensional array.
int counter = 0;
//b. Create two for loops to loop through the rows and columns of the
// two dimensional array.
for (int i = 0; i < row; i++) {
for (int j = 0; j < col; j++) {
//if counter is less then the length of the one dimensional array,
//then copy the element at that position into the two dimensional
//array. And also increment counter by one.
if (counter < oneD.length) {
twoD[i][j] = oneD[counter];
counter++;
}
//Otherwise, just pad the array with zeros
else {
twoD[i][j] = 0;
}
}
}
//You might want to create another pair of loop to print the elements
//in the populated two dimensional array as follows
for (int i = 0; i < twoD.length; i++) {
for (int j = 0; j < twoD[i].length; j++) {
System.out.print(twoD[i][j] + " ");
}
System.out.println("");
}
} //End of first method
//Second method with String array as parameter
public static void convert2D(String[] oneD) {
//1. First calculate the number of columns
//a. get the length of the one dimensional array
int arraylength = oneD.length;
//b. find the square root of the length and typecast it into a float
float squareroot = (float) Math.sqrt(arraylength);
//c. round off the result and save in a variable called row
int row = Math.round(squareroot);
//2. Secondly, calculate the number of columns
//a. if the square of the number of rows is greater than or equal to the length of
//the one dimensional array, then to minimize padding, the number of
//columns is the same as the number of rows.
//b. otherwise, the number of columns in one more than the
//number of rows.
int col = (row * row >= arraylength) ? row : row + 1;
//3. Create a 2D String array with the number of rows and cols
String[][] twoD = new String[row][col];
//4. Place the elements in the one dimensional array into the two
// dimensional array.
//a. First create a variable counter to control the cycle through the one
// dimensional array.
int counter = 0;
//b. Create two for loops to loop through the rows and columns of the
//two dimensional array.
for (int i = 0; i < row; i++) {
for (int j = 0; j < col; j++) {
//if counter is less then the length of the one dimensional array,
//then copy the element at that position into the two dimensional
//array. And also increment counter by one.
if (counter < oneD.length) {
twoD[i][j] = oneD[counter];
counter++;
}
//Otherwise, just pad the array with null values
else {
twoD[i][j] = null;
}
}
}
//You might want to create another pair of loop to print the elements
//in the populated two dimensional array as follows:
for (int i = 0; i < twoD.length; i++) {
for (int j = 0; j < twoD[i].length; j++) {
System.out.print(twoD[i][j] + " ");
}
System.out.println("");
}
} // End of the second method
//Create the main method
public static void main(String[] args) {
//1. Create an arbitrary one dimensional int array
int[] x = {23, 3, 4, 3, 2, 4, 3, 3, 5, 6, 5, 3, 5, 5, 6, 3};
//2. Create an arbitrary two dimensional String array
String[] names = {"abc", "john", "dow", "doe", "xyz"};
//Call the respective methods
convert2D(x);
System.out.println("");
convert2D(names);
} // End of the main method
} // End of class definition
=========================================================
==========================================================
Sample Output23 3 4 3
2 4 3 3
5 6 5 3
5 5 6 3
abc john dow
doe xyz null
==========================================================
Explanation:The above code has been written in Java and it contains comments explaining each line of the code. Please go through the comments. The actual executable lines of code are written in bold-face to distinguish them from the comments.
Write the method addItemToStock to add an item into the grocery stock array. The method will: • Insert the item with itemName add quantity items to stock. • If itemName is already present in stock, increase the quantity of the item, otherwise add new itemName to stock. • If itemName is not present in stock, insert at the first null position in the stock array. After the insertion all items are adjacent in the array (no null positions between two items). • Additionally, double the capacity of the stock array if itemName is a new item to be inserted and the stock is full.
Answers
Answer:
#include <stdio.h>
#include <iostream>
using namespace std;
int main()
{
//varible to indicate size of the array
int size=20;
//arrays to hold grocery item names and their quantities
std::string grocery_item[size];
int item_stock[size];
//variables to hold user input
std::string itemName;
int quantity;
//variable to check if item is already present
bool itemPresent=false;
//variable holding full stock value
int full_stock=100;
for(int n=0; n<size; n++)
{
grocery_item[n]="";
item_stock[n]=0;
}
do
{
std::cout << endl<<"Enter the grocery item to be added(enter q to quit): ";
cin>>itemName;
if(itemName=="q")
{
cout<<"Program ends..."<<endl; break;
}
else
{
std::cout << "Enter the grocery item stock to be added: ";
cin>>quantity;
}
for(int n=0; n<size; n++)
{
if(grocery_item[n]==itemName)
{
itemPresent=true;
item_stock[n]=item_stock[n]+quantity;
}
}
if(itemPresent==false)
{
for(int n=0; n<size; n++)
{
if(grocery_item[n]=="")
{
itemPresent=true;
grocery_item[n]=itemName;
item_stock[n]=item_stock[n]+quantity;
}
if(item_stock[n]==full_stock)
{
item_stock[n]=item_stock[n]*2;
}
}
}
}while(itemName!="q");
return 0;
}
OUTPUT
Enter the grocery item to be added(enter q to quit): rice
Enter the grocery item stock to be added: 23
Enter the grocery item to be added(enter q to quit): bread
Enter the grocery item stock to be added: 10
Enter the grocery item to be added(enter q to quit): bread
Enter the grocery item stock to be added: 12
Enter the grocery item to be added(enter q to quit): q
Program ends...
Explanation:
1. The length of the array and the level of full stock has been defined inside the program.
2. Program can be tested for varying values of length of array and full stock level.
3. The variables are declared outside the do-while loop.
4. Inside do-while loop, user input is taken. The loop runs until user opts to quit the program.
5. Inside do-while loop, the logic for adding the item to the array and adding the quantity to the stock has been included. For loops have been used for arrays.
6. The program only takes user input for the item and the respective quantity to be added.
Assume the existence of an UNSORTED ARRAY of n characters. You are to trace the CS111Sort algorithm (as described here) to reorder the elements of a given array. The CS111Sort algorithm is an algorithm that combines the SelectionSort and the InsertionSort following the steps below: 1. Implement the SelectionSort Algorithm on the entire array for as many iterations as it takes to sort the array only to the point of ordering the elements so that the last n/2 elements are sorted in increasing (ascending) order. 2. Implement the InsertionSort Algorithm to sort the first half of the resulting array elements so that these elements are sorted in decreasing (descending) order.
Answers
Answer:
class Main {
public static void main(String[] args) {
char arr[] = {'T','E','D','R','W','B','S','V','A'};
int n = arr.length;
System.out.println("Selection Sort:");
System.out.println("Iteration\tArray\tComparisons");
long comp1 = selectionSort(arr);
System.out.println("Total comparisons: "+comp1);
System.out.println("\nInsertion Sort:");
System.out.println("Iteration\tArray\tComparisons");
long comp2 = insertionSort(arr);
System.out.println("Total Comparisons: "+comp2);
System.out.println("\nOverall Total Comparisons: "+(comp1+comp2));
}
static long selectionSort(char arr[]) {
// applies selection sort for n/2 elements
// returns number of comparisons
int n = arr.length;
long comparisons = 0;
// One by one move boundary of unsorted subarray
for (int i = n-1; i>=n-n/2; i--) {
// Find the minimum element in unsorted array
int max_idx = i;
for (int j = i-1; j>=0; j--) {
// there is a comparison everytime this loop returns
comparisons++;
if (arr[j] > arr[max_idx])
max_idx = j;
}
// Swap the found minimum element with the first
// element
char temp = arr[max_idx];
arr[max_idx] = arr[i];
arr[i] = temp;
System.out.print(n-1-i+"\t");
printArray(arr);
System.out.println("\t"+comparisons);
}
return comparisons;
}
static long insertionSort(char arr[]) {
// applies insertion sort for n/2 elements
// returns number of comparisons
int n = arr.length;
n = n-n/2; // sort only the first n/2 elements
long comparisons = 0;
for (int i = 1; i < n; ++i) {
char key = arr[i];
int j = i - 1;
/* Move elements of arr[0..i-1], that are
greater than key, to one position ahead
of their current position */
while (j >= 0) {
// there is a comparison everytime this loop runs
comparisons++;
if (arr[j] > key) {
arr[j + 1] = arr[j];
} else {
break;
}
j--;
}
arr[j + 1] = key;
System.out.print(i-1+"\t");
printArray(arr);
System.out.println("\t"+comparisons);
}
return comparisons;
}
static void printArray(char arr[]) {
for (int i=0; i<arr.length; i++)
System.out.print(arr[i]+" ");
}
}
Explanation:
Explanation is in the answer.
Which of the following is an example of the rewards & consequences characteristic of an organization?
OOO
pay raise
time sheets
pay check
pay scale
Answers
Answer:
Pay raise is an example of the rewards & consequences characteristic of an organization.
How we can earn from an app
Answers
Answer:
Hewo, Here are some ways in which apps earn money :-
AdvertisementSubscriptionsIn-App purchasesMerchandisePhysical purchasesSponsorshiphope it helps!
For dinner, a restaurant allows you to choose either Menu Option A: five appetizers and three main dishes or Menu Option B: three appetizers and four main dishes. There are six kinds of appetizer on the menu and five kinds of main dish.
How many ways are there to select your menu, if...
a. You may not select the same kind of appetizer or main dish more than once.
b. You may select the same kind of appetizer and/or main dish more than once.
c. You may select the same kind of appetizer or main dish more than once, but not for all your choices, For example in Menu Option A, it would be OK to select four portions of 'oysters' and one portion of 'pot stickers', but not to select all five portions of 'oysters'.)
In each case show which formula or method you used to derive the result.
Answers
Answer:
The formula used in this question is called the probability of combinations or combination formula.
Explanation:
Solution
Given that:
Formula applied is stated as follows:
nCr = no of ways to choose r objects from n objects
= n!/(r!*(n-r)!)
The Data given :
Menu A : 5 appetizers and 3 main dishes
Menu B : 3 appetizers and 4 main dishes
Total appetizers - 6
Total main dishes - 5
Now,
Part A :
Total ways = No of ways to select menu A + no of ways to select menu B
= (no of ways to select appetizers in A)*(no of ways to select main dish in A) + (no of ways to select appetizers in B)*(no of ways to select main dish in B)
= 6C5*5C3 + 6C3*5C4
= 6*10 + 20*5
= 160
Part B :
Since, we can select the same number of appetizers/main dish again so the number of ways to select appetizers/main dishes will be = (total appetizers/main dishes)^(no of appetizers/main dishes to be selected)
Total ways = No of ways to select menu A + no of ways to select menu B
= (no of ways to select appetizers in A)*(no of ways to select main dish in A) + (no of ways to select appetizers in B)*(no of ways to select main dish in B)
= (6^5)*(5^3) + (6^3)*(5^4)
= 7776*125 + 216*625
= 1107000
Part C :
No of ways to select same appetizers and main dish for all the options
= No of ways to select menu A + no of ways to select menu B
= (no of ways to select appetizers in A)*(no of ways to select main dish in A) + (no of ways to select appetizers in B)*(no of ways to select main dish in B)
=(6*5) + (6*5)
= 60
Total ways = Part B - (same appetizers and main dish selected)
= 1107000 - 60
= 1106940
Write Scheme functions to do the following. You are only allowed to use the functions introduced in our lecture notes and the helper functions written by yourself. (a) Return all rotations of a given list. For example, (rotate ’(a b c d e)) should return ((a b c d e) (b c d e a) (c d e a b) (d e a b c) (e a b c d)) (in some order). (b) Return a list containing all elements of a given list that satisfy a given predicate. For example, (filter (lambda (x) (< x 5)) ’(3 9 5 8 2 4 7)) should return (3 2 4).
Answers
Answer:
Check the explanation
Explanation:
solution a:
def Rotate(string) :
n = len(string)
temp = string + string
for i in range(n) :
for j in range(n) :
print(temp[i + j], end = "")
print()
string = ("abcde")
Rotate(string)
solution b:
nums = [3,9,5,8,2,4,7]
res = list(filter(lambda n : n < 5, nums))
print(res)
Box one:
logical
Date and time
Compatibility
Web
Box 2:
&
$
=
#
Box 3:
Not
If
Or
Sum
Answers
Box Two I’m not sure, it depends on what language or program or website you’re using, however I’d assume it would be ‘=‘
Box Three is If
Write a program to read as many test scores as the user wants from the keyboard (assuming at most 50 scores). Print the scores in (1) original order, (2) sorted from high to low (3) the highest score, (4) the lowest score, and (5) the average of the scores. Implement the following functions using the given function prototypes: void displayArray(int array[], int size) - Displays the content of the array void selectionSort(int array[], int size) - sorts the array using the selection sort algorithm in descending order. Hint: refer to example 8-5 in the textbook. int findMax(int array[], int size) - finds and returns the highest element of the array int findMin(int array[], int size) - finds and returns the lowest element of the array double findAvg(int array[], int size) - finds and returns the average of the elements of the array
Answers
Answer: Provided in the explanation segment
Explanation:
Below is the code to carry out this program;
/* C++ program helps prompts user to enter the size of the array. To display the array elements, sorts the data from highest to lowest, print the lowest, highest and average value. */
//main.cpp
//include header files
#include<iostream>
#include<iomanip>
using namespace std;
//function prototypes
void displayArray(int arr[], int size);
void selectionSort(int arr[], int size);
int findMax(int arr[], int size);
int findMin(int arr[], int size);
double findAvg(int arr[], int size) ;
//main function
int main()
{
const int max=50;
int size;
int data[max];
cout<<"Enter # of scores :";
//Read size
cin>>size;
/*Read user data values from user*/
for(int index=0;index<size;index++)
{
cout<<"Score ["<<(index+1)<<"]: ";
cin>>data[index];
}
cout<<"(1) original order"<<endl;
displayArray(data,size);
cout<<"(2) sorted from high to low"<<endl;
selectionSort(data,size);
displayArray(data,size);
cout<<"(3) Highest score : ";
cout<<findMax(data,size)<<endl;
cout<<"(4) Lowest score : ";
cout<<findMin(data,size)<<endl;
cout<<"(5) Lowest scoreAverage score : ";
cout<<findAvg(data,size)<<endl;
//pause program on console output
system("pause");
return 0;
}
/*Function findAvg that takes array and size and returns the average of the array.*/
double findAvg(int arr[], int size)
{
double total=0;
for(int index=0;index<size;index++)
{
total=total+arr[index];
}
return total/size;
}
/*Function that sorts the array from high to low order*/
void selectionSort(int arr[], int size)
{
int n = size;
for (int i = 0; i < n-1; i++)
{
int minIndex = i;
for (int j = i+1; j < n; j++)
if (arr[j] > arr[minIndex])
minIndex = j;
int temp = arr[minIndex];
arr[minIndex] = arr[i];
arr[i] = temp;
}
}
/*Function that display the array values */
void displayArray(int arr[], int size)
{
for(int index=0;index<size;index++)
{
cout<<setw(4)<<arr[index];
}
cout<<endl;
}
/*Function that finds the maximum array elements */
int findMax(int arr[], int size)
{
int max=arr[0];
for(int index=1;index<size;index++)
if(arr[index]>max)
max=arr[index];
return max;
}
/*Function that finds the minimum array elements */
int findMin(int arr[], int size)
{
int min=arr[0];
for(int index=1;index<size;index++)
if(arr[index]<min)
min=arr[index];
return min;
}
cheers i hope this help!!!
Which of the following is a component of slides
Answers
Implement the function pairSum that takes as parameters a list of distinct integers and a target value n and prints the indices of all pairs of values in the list that sum up to n. If there are no pairs that sum up to n, the function should not print anything. Note that the function does not duplicate pairs of indices
Answers
Answer:
Following are the code to this question:
def pairSum(a,x): #find size of list
s=len(a) # use length function to calculte length of list and store in s variable
for x1 in range(0, s): #outer loop to count all list value
for x2 in range(x1+1, s): #inner loop
if a[x1] + a[x2] == x: #condition check
print(x1," ",x2) #print value of loop x1 and x2
pairSum([12,7,8,6,1,13],13) #calling pairSum method
Output:
0 4
1 3
Explanation:
Description of the above python can be described as follows:
In the above code, a method pairSum is declared, which accepts two-parameter, which is "a and x". Inside the method "s" variable is declared that uses the "len" method, which stores the length of "a" in the "s" variable. In the next line, two for loop is declared, in the first loop, it counts all variable position, inside the loop another loop is used that calculates the next value and inside a condition is defined, that matches list and x variable value. if the condition is true it will print loop value.Which term describes the order of arrangement of files and folders on a computer?
File is the order of arrangement of files and folders.
Answers
Answer:
Term describes the order of arrangement of files and folders on a computer would be ORGANIZATION.
:) Hope this helps!
Answer:
The term that describes the order of arrangement of files and folders on a computer is organization.
Explanation:
This represents a group of Book values as a list (named books). We can then dig through this list for useful information and calculations by calling the methods we're going to implement. class Library: Define the Library class. • def __init__(self): Library constructor. Create the only instance variable, a list named books, and initialize it to an empty list. This means that we can only create an empty Library and then add items to it later on.
Answers
Answer:
class Library: def __init__(self): self.books = [] lib1 = Library()lib1.books.append("Biology") lib1.books.append("Python Programming Cookbook")Explanation:
The solution code is written in Python 3.
Firstly, we can create a Library class with one constructor (Line 2). This constructor won't take any input parameter value. There is only one instance variable, books, in the class (Line 3). This instance variable is an empty list.
To test our class, we can create an object lib1 (Line 5). Next use that object to add the book item to the books list in the object (Line 6-8).
In this lab, you use the flowchart and pseudocode found in the figures below to add code to a partially created C++ program. When completed, college admissions officers should be able to use the C++ program to determine whether to accept or reject a student, based on his or her test score and class rank.
// HouseSign.cpp - This program calculates prices for custom made signs.
#include
#include
using namespace std;
int main()
{
// This is the work done in the housekeeping() function
// Declare and initialize variables here
// Charge for this sign
// Color of characters in sign
// Number of characters in sign
// Type of wood
// This is the work done in the detailLoop() function
// Write assignment and if statements here
// This is the work done in the endOfJob() function
// Output charge for this sign
cout << "The charge for this sign is $" << charge << endl;
return(0);
}
Answers
Here is the complete question.
In this lab, you use the flowchart and pseudocode found in the figures below to add code to a partially created C++ program. When completed, college admissions officers should be able to use the C++ program to determine whether to accept or reject a student, based on his or her test score and class rank.
start input testScore,
classRank if testScore >= 90 then if classRank >= 25 then output "Accept"
else output "Reject" endif else if testScore >= 80
then if classRank >= 50 then output "Accept" else output "Reject" endif
else if testScore >= 70
then if classRank >= 75 then output "Accept"
else output "Reject"
endif else output "Reject"
endif
endif
endif
stop
Study the pseudocode in picture above. Write the interactive input statements to retrieve: A student’s test score (testScore) A student's class rank (classRank) The rest of the program is written for you. Execute the program by clicking "Run Code." Enter 87 for the test score and 60 for the class rank. Execute the program by entering 60 for the test score and 87 for the class rank.
[comment]: <> (3. Write the statements to convert the string representation of a student’s test score and class rank to the integer data type (testScore and classRank, respectively).)
Function: This program determines if a student will be admitted or rejected. Input: Interactive Output: Accept or Reject
*/ #include using namespace std; int main() { // Declare variables
// Prompt for and get user input
// Test using admission requirements and print Accept or Reject
if(testScore >= 90)
{ if(classRank >= 25)
{ cout << "Accept" << endl; }
else
cout << "Reject" << endl; }
else { if(testScore >= 80)
{ if(classRank >= 50)
cout << "Accept" << endl;
else cout << "Reject" << endl; }
else { if(testScore >= 70)
{ if(classRank >=75) cout << "Accept" << endl;
else cout << "Reject" << endl; }
else cout << "Reject" << endl; } } } //End of main() function
Answer:
Explanation:
The objective here is to use the flowchart and pseudocode found in the figures below to add code to a partially created C++ program. When completed, college admissions officers should be able to use the C++ program to determine whether to accept or reject a student, based on his or her test score and class rank.
PROGRAM:
#include<iostream>
using namespace std;
int main(){
// Declare variables
int testScore, classRank;
// Prompt for and get user input
cout<<"Enter test score: ";
cin>>testScore;
cout<<"Enter class rank: ";
cin>>classRank;
// Test using admission requirements and print Accept or Reject
if(testScore >= 90)
{ if(classRank >= 25)
{ cout << "Accept" << endl; }
else
cout << "Reject" << endl;
}
else { if(testScore >= 80)
{ if(classRank >= 50)
cout << "Accept" << endl;
else cout << "Reject" << endl; }
else { if(testScore >= 70)
{ if(classRank >=75) cout << "Accept" << endl;
else cout << "Reject" << endl;
}
else cout << "Reject" << endl; }
}
return 0;
} //End of main() function
OUTPUT:
See the attached file below:
Rewrite this if/else if code segment into a switch statement int num = 0; int a = 10, b = 20, c = 20, d = 30, x = 40; if (num > 101 && num <= 105) { a += 1; } else if (num == 208) { b += 1; x = 8; } else if (num > 208 && num < 210) { c = c * 3; } else { d += 1004; }
Answers
Answer:
public class SwitchCase {
public static void main(String[] args) {
int num = 0;
int a = 10, b = 20, c = 20, d = 30, x = 40;
switch (num){
case 102: a += 1;
case 103: a += 1;
case 104: a += 1;
case 105: a += 1;
break;
case 208: b += 1; x = 8;
break;
case 209: c = c * 3;
case 210: c = c * 3;
break;
default: d += 1004;
}
}
}
Explanation:
Given above is the equivalent code using Switch case in JavaThe switch case test multiple levels of conditions and can easily replace the uses of several if....elseif.....else statements.When using a switch, each condition is treated as a separate case followed by a full colon and the the statement to execute if the case is true.The default statement handles the final else when all the other coditions are falseWrite an expression to detect that the first character of userinput matches firstLetter.
import java.util.Scanner; public class CharMatching { public static void main (String [] args) { Scanner scnr = new Scanner(System.in); String userInput; char firstLetter; userInput = scnr.nextLine(); firstLetter = scnr.nextLine().charAt(0); if (/* Your solution goes here */) { System.out.println("Found match: " + firstLetter); } else { System.out.println("No match: " + firstLetter); } return; } }
Answers
Answer: Provided in the explanation segment
Explanation:
Below is the code to run this program.
we have that the
Program
import java.util.Scanner;
public class CharMatching {
public static void main(String[] args) {
//Scanner object for keyboard read
Scanner scnr=new Scanner(System.in);
//Variable for user input string
String userInput;
//Variable for firstletter input
char firstLetter;
//Read user input string
userInput=scnr.nextLine();
//Read first letter from user
firstLetter=scnr.nextLine().charAt(0);
//Comparison without case sensititvity and result
if(Character.toUpperCase(firstLetter)==Character.toUpperCase(userInput.charAt(0))) {
System.out.println("Found match: "+firstLetter);
}
else {
System.out.println("No match: "+firstLetter);
}
}
}
Output
Hello
h
Found match: h
cheers i hope this helped !!!
Consider the following relations:
Emp(eid: integer, ename: varchar, sal: integer, age: integer, did: integer) Dept(did: integer, budget: integer, floor: integer, mgr_eid: integer) Salaries range from $10,000 to $100,000, ages vary from 20 to 80, each department has about five employees on average, there are 10 floors, and budgets vary from $10,000 to $1 million. You can assume uniform distributions of values. For each of the following queries, which of the listed index choices would you choose to speed up the query.
1. Query: Print ename, age, and sal for all employees.
A) Clustered hash index on fields of Emp.
B) Unclustered hash index on fields of Emp.
C) Clustered B+ tree index on fields of Emp.
D) Unclustered hash index on fields of Emp.
E) No index.
2. Query: Find the dids of departments that are on the 10th floor and have a budget of less than $15,000.
A) Clustered hash index on the floor field of Dept.
B) Unclustered hash index on the floor field of Dept.
C) Clustered B+ tree index on fields of Dept.
D) Clustered B+ tree index on the budget field of Dept.
E) No index.
Answers
Answer:
Check the explanation
Explanation:
--Query 1)
SELECT ename, sal, age
FROM Emp;
--Query 2)
SELECT did
FROM Dept
WHERE floot = 10 AND budget<15000;
3.15 LAB: Countdown until matching digits
Write a program that takes in an integer in the range 20-98 as input. The output is a countdown starting from the integer, and stopping when both output digits are identical.
Ex: If the input is:
93
the output is:
93 92 91 90 89 88
Ex: If the input is:
77
the output is:
77
Ex: If the input is:
15
or any value not between 20 and 98 (inclusive), the output is:
Input must be 20-98.
#include
using namespace std;
int main() {
// variable
int num;
// read number
cin >> num;
while(num<20||num>98)
{
cout<<"Input must be 20-98 ";
cin>> num;
}
while(num % 10 != num /10)
{
// print numbers.
cout<
// update num.
num--;
}
// display the number.
cout<
return 0;
}
I keep getting Program generated too much output.
Output restricted to 50000 characters.
Check program for any unterminated loops generating output
Answers
Answer:
See explaination
Explanation:
n = int(input())
if 20 <= n <= 98:
while n % 11 != 0: // for all numbers in range (20-98) all the identical
digit numbers are divisible by 11,So all numbers that
are not divisible by 11 are a part of count down, This
while loop stops when output digits get identical.
print(n, end=" ")
n = n - 1
print(n)
else:
print("Input must be 20-98")
Design and implement the Heap.h header using the given Heap class below:
template
class Heap
public:
Heap();
Heap(const T elements[], int arraySize); //
Remove the root from the heap and maintain the heap property
T remove() throw (runtime_error);
// Insert element into the heap and maintain the heap property
void add(const T& element);
// Get the number of element in the heap
int getSize() const;
private:
vector v;
Removing the root in a heap - after the root is removed, the tree must be rebuilt to maintain the heap property:
Move the last node to replace the root;
Let the root be the current node;
While (the current node has children and the current node is smaller than one of its children) Swap the current node with the larger of its children; The current node now is one level down;}
Adding a new node - to add a new node to the heap, first add it to the end of the heap and then rebuild the tree as follows:
Let the last node be the current node;
While (the current node is greater than its parent)
{Swap the current node with its parent; The current node now is one level up:}
To test the header file, write the heapSort function and use the following main program:
#include
#include "Heap.h"
using namespace std;
template
void heapSort(T list[], int arraySize) 1/
your code here .. p
int main()
const int SIZE = 9;
int list[] = { 1, 2, 3, 4, 9, 11, 3, 1, 2 }; heapSort(list, SIZE);
cout << "Sorted elements using heap: \n";
for (int i = 0; i < SIZE; i++) cout << list[i] << " ";
cout << endl;
system("pause");
return;
Sample output:
Sorted elements using heap:
1 1 2 3 3 4 7 9 11
Answers
Answer:
See explaination
Explanation:
/* Heap.h */
#ifndef HEAP_H
#define HEAP_H
#include<iostream>
using namespace std;
template<class T>
class Heap
{
public:
//constructor
Heap()
{
arr = nullptr;
size = maxsize = 0;
}
//parameterized constructor
Heap(const T elements[], int arraySize)
{
maxsize = arraySize;
size = 0;
arr = new T[maxsize];
for(int i=0; i<maxsize; i++)
{
add(elements[i]);
}
}
//Remove the root from the heap and maintain the heap property
T remove() //code is altered
{
T item = arr[0];
arr[0] = arr[size-1];
size--;
T x = arr[0];
int parent = 0;
while(1)
{
int child = 2*parent + 1;
if(child>=size) break;
if(child+1 < size &&arr[child+1]>arr[child])
child++;
if(x>=arr[child]) break;
arr[parent] = arr[child];
parent = child;
}
arr[parent] = x;
return item;
}
//Insert element into the heap and maintain the heap property
void add(const T&element)
{
if(size==0)
{
arr[size] = element;
size++;
return;
}
T x = element;
int child = size;
int parent = (child-1)/2;
while(child>0 && x>arr[parent])
{
arr[child] = arr[parent];
child = parent;
parent = (child-1)/2;
}
arr[child] = x;
size++;
}
//Get the number of element in the heap
int getSize() const
{
return size;
}
private:
T *arr; //code is altered
int size, maxsize;
};
#endif // HEAP_H
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/* main.cpp */
#include<iostream>
#include "Heap.h"
using namespace std;
template <typename T>
void heapSort(T list[], int arraySize)
{
Heap<T> heap(list, arraySize);
int n = heap.getSize();
for(int i=n-1; i>0; i--)
{
list[i] = heap.remove();
}
}
int main()
{
const int SIZE = 9;
int list[] = {1, 7, 3, 4, 9, 11, 3, 1, 2};
heapSort<int>(list, SIZE);
cout << "Sorted elements using heap: \n";
for (int i = 0; i < SIZE; i++)
cout << list[i] << " ";
cout <<endl;
system("pause");
return 0;
}
Write the interface (.h file) of a class Counter containing: A data member counter of type int. A data member named counterID of type int. A static int data member named nCounters. A constructor that takes an int argument. A function called increment that accepts no parameters and returns no value. A function called decrement that accepts no parameters and returns no value. A function called getValue that accepts no parameters and returns an int. A function named getCounterID that accepts no parameters and returns an int.
Answers
Explanation:
See the attached image for The interface (.h file) of a class Counter
Let A be an array of n numbers. Recall that a pair of indices i, j is said to be under an inversion if A[i] > A[j] and i < j. Design a divide-and-conquer based algorithm to count the number of inversions in an array of n numbers. You can start by splitting into two subproblems. Answer clearly how you do the merge step, then obtain a recurrence relation that captures the run time of the algorithm. Solve the recurrence relation. Write the complete pseudocode.
Answers
Answer:
Check the explanation
Explanation:
#include <stdio.h>
int inversions(int a[], int low, int high)
{
int mid= (high+low)/2;
if(low>=high)return 0 ;
else
{
int l= inversions(a,low,mid);
int r=inversions(a,mid+1,high);
int total= 0 ;
for(int i = low;i<=mid;i++)
{
for(int j=mid+1;j<=high;j++)
if(a[i]>a[j])total++;
}
return total+ l+r ;
}
}
int main() {
int a[]={5,4,3,2,1};
printf("%d",inversions(a,0,4));
return 0;
}
Check the output in the below attached image.
Suppose you are given a text file. Design a Python3 program to encrypt/decrypt that text file as follows:
If the character is an upper case character then shift that character forward, s characters forward in the alphabet.
If the character is a lower case character then shift that character backwards, s characters backwards in the alphabet.
If the character is a numeric character then shift that character also backwards, s characters backwards in the 1-digit numbers set {0,1,2,3,4,5,6,7,8,9}.
You must design two functions; one to encrypt. The other one is to decrypt. All white space and punctuation marks must be ignored(cannot be changed). If you reach Z, or A, the shifting may continue as a cycle(A comes after Z, Z comes before A). Both files (original text file and the encrypted text file) must be stored in the working directory of Python.
An example;
Let s=1 and the text file:
11300Hello World
Then encoded text file;
002991dkkn Xnqke
Answers
Answer:
Explanation:
Please find attachment for the Python program
D-H public key exchange Please calculate the key for both Alice and Bob.
Alice Public area Bob
Alice and Bob publicly agree to make
N = 50, P = 41
Alice chooses her Bob
picks his
Private # A = 19 private #
B= ?
------------------------------------------------------------------------------------------------------------------------------------------
I am on Alice site, I choose my private # A = 19.
You are on Bob site, you pick up the private B, B and N should have no common factor, except 1.
(Suggest to choose B as a prime #) Please calculate all the steps, and find the key made by Alice and Bob.
The ppt file of D-H cryptography is uploaded. You can follow the steps listed in the ppt file.
Show all steps.
Answers
Answer:
See explaination
Explanation:
Please kindly check attachment for the step by step solution of the given problem.
A user has called the company help desk to inform them that their Wi-Fi enabled mobile device has been stolen. A support ticket has been escalated to the appropriate team based on the corporate security policy. The security administrator has decided to pursue a device wipe based on corporate security policy. However, they are unable to wipe the device using the installed MDM solution. What is one reason that may cause this to happen?
Answers
Answer:
The software can't locate the device
Explanation:
The device wasn't properly setup in order for the software to locate it.
Define a function CoordTransform() that transforms the function's first two input parameters xVal and yVal into two output parameters xValNew and yValNew. The function returns void. The transformation is new = (old + 1) * 2. Ex: If xVal = 3 and yVal = 4, then xValNew is 8 and yValNew is 10.
Answers
Answer:
Check the explanation
Explanation:
#include <iostream>
using namespace std;
void CoordTransform(int x, int y, int& xValNew,int& yValNew){
xValNew = (x+1)*2;
yValNew = (y+1)*2;
}
int main() {
int xValNew = 0;
int yValNew = 0;
CoordTransform(3, 4, xValNew, yValNew);
cout << "(3, 4) becomes " << "(" << xValNew << ", " << yValNew << ")" << endl;
return 0;
}
6 things you should consider when planning a PowerPoint Presentation.
Answers
Answer: I would suggest you consider your audience and how you can connect to them. Is your presentation, well, presentable? Is whatever you're presenting reliable and true? Also, no more than 6 lines on each slide. Use colors that contrast and compliment. Images, use images. That pulls whoever you are presenting to more into your presentation.
Explanation:
Given the following header: vector split(string target, string delimiter); implement the function split so that it returns a vector of the strings in target that are separated by the string delimiter. For example: split("10,20,30", ",") should return a vector with the strings "10", "20", and "30". Similarly, split("do re mi fa so la ti do", " ") should return a vector with the strings "do", "re","mi", "fa", "so", "la", "ti", and "do". Write a program that inputs two strings and calls your function to split the first target string by the second delimiter string and prints the resulting vector all on line line with elements separated by commas. A successful program should be as below with variable inputs:
Answers
Answer:
see explaination
Explanation:
#include <iostream>
#include <string>
#include <vector>
using namespace std;
vector<string> split(string, string);
int main()
{
vector<string> splitedStr;
string data;
string delimiter;
cout << "Enter string to split:" << endl;
getline(cin,data);
cout << "Enter delimiter string:" << endl;
getline(cin,delimiter);
splitedStr = split(data,delimiter);
cout << "\n";
cout << "The substrings are: ";
for(int i = 0; i < splitedStr.size(); i++)
cout << "\"" << splitedStr[i] << "\"" << ",";
cout << endl << endl;
cin >> data;
return 0;
}
vector<string> split(string target, string delimiter)
{
unsigned first = 0;
unsigned last;
vector<string> subStr;
while((last = target.find(delimiter, first)) != string::npos)
{
subStr.push_back(target.substr(first, last-first));
first = last + delimiter.length();
}
subStr.push_back(target.substr(first));
return subStr;
}
5.14 ◆ Write a version of the inner product procedure described in Problem 5.13 that uses 6 × 1 loop unrolling. For x86-64, our measurements of the unrolled version give a CPE of 1.07 for integer data but still 3.01 for both floating-point data. A. Explain why any (scalar) version of an inner product procedure running on an Intel Core i7 Haswell processor cannot achieve a CPE less than 1.00. B. Explain why the performance for floating-point data did not improve with loop unrolling.
Answers
Answer:
(a) the number of times the value is performs is up to four cycles. and as such the integer i is executed up to 5 times. (b)The point version of the floating point can have CPE of 3.00, even when the multiplication operation required is either 4 or 5 clock.
Explanation:
Solution
The two floating point versions can have CPEs of 3.00, even though the multiplication operation demands either 4 or 5 clock cycles by the latency suggests the total number of clock cycles needed to work the actual operation, while issues time to specify the minimum number of cycles between operations.
Now,
sum = sum + udata[i] * vdata[i]
in this case, the value of i performs from 0 to 3.
Thus,
The value of sum is denoted as,
sum = ((((sum + udata[0] * vdata[0])+(udata[1] * vdata[1]))+( udata[2] * vdata[2]))+(udata[3] * vdata[3]))
Thus,
(A)The number of times the value is executed is up to 4 cycle. And the integer i performed up to 5 times.
Thus,
(B) The floating point version can have CPE of 3.00, even though the multiplication operation required either 4 or 5 clock.
3.34 LAB: Mad Lib - loops in C++
Mad Libs are activities that have a person provide various words, which are then used to complete a short story in unexpected (and hopefully funny) ways.
Write a program that takes a string and integer as input, and outputs a sentence using those items as below. The program repeats until the input is quit 0.
Ex: If the input is:
apples 5
shoes 2
quit 0
the output is:
Eating 5 apples a day keeps the doctor away.
Eating 2 shoes a day keeps the doctor away.
Make sure your answer is in C++.
Answers
Answer:
A Program was written to carry out some set activities. below is the code program in C++ in the explanation section
Explanation:
Solution
CODE
#include <iostream>
using namespace std;
int main() {
string name; // variables
int number;
cin >> name >> number; // taking user input
while(number != 0)
{
// printing output
cout << "Eating " << number << " " << name << " a day keeps the doctor away." << endl;
// taking user input again
cin >> name >> number;
}
}
Note: Kindly find an attached copy of the compiled program output to this question.
In this exercise we have to use the knowledge in computational language in C++ to describe a code that best suits, so we have:
The code can be found in the attached image.
What is looping in programming?In a very summarized way, we can describe the loop or looping in software as an instruction that keeps repeating itself until a certain condition is met.
To make it simpler we can write this code as:
#include <iostream>
using namespace std;
int main() {
string name; // variables
int number;
cin >> name >> number; // taking user input
while(number != 0)
{
// printing output
cout << "Eating " << number << " " << name << " a day keeps the doctor away." << endl;
// taking user input again
cin >> name >> number;
}
}
See more about C++ at brainly.com/question/19705654
