Answer:
OSI đề cập đến Kết nối hệ thống mở trong khi TCP / IP đề cập đến Giao thức điều khiển truyền. OSI theo cách tiếp cận dọc trong khi TCP / IP theo cách tiếp cận ngang. Mô hình OSI, lớp truyền tải, chỉ hướng kết nối trong khi mô hình TCP / IP là cả hướng kết nối và không kết nối.
Explanation:
dab
After reading all L02 content pages in Lesson 02: Inheritance and Interfaces, you will complete this assignment according to the information below.Do not use the scanner class or any other user input request. You application should be self-contained and run without user input.Assignment ObjectivesPractice on implementing interfaces in JavaFootballPlayer will implement the interface TableMemberOverriding methodswhen FootballPlayer implements TableMember, FootballPlayer will have to write the real Java code for all the interface abstract methodsDeliverablesA zipped Java project according to the How to submit Labs and Assignments guide.O.O. Requirements (these items will be part of your grade)One class, one file. Don't create multiple classes in the same .java fileDon't use static variables and methodsEncapsulation: make sure you protect your class variables and provide access to them through get and set methodsAll the classes are required to have a constructor that receives all the attributes as parameters and update the attributes accordinglyAll the classes are required to have an "empty" constructor that receives no parameters but updates all the attributes as neededFollow Horstmann's Java Language Coding GuidelinesOrganized in packages (MVC - Model - View Controller)Contents
Solution :
App.java:
import Controller.Controller;
import Model.Model;
import View.View;
public class App
{
public static void main(String[] args) // Main method
{
Model model = new Model(); // Creates model object.
View view = new View(); // Creates view object.
Controller controller = new Controller(view, model); // Creates controller object that accepts view and model objects.
}
}
[tex]\text{Controller.java:}[/tex]
package Controller;
[tex]\text{impor}t \text{ Model.Model;}[/tex]
import View.View;
[tex]\text{public class Controller}[/tex]
{
Model model; // Model object
View view; // View object
public Controller(View v, Model m) // Method that imports both model and view classes as objects.
{
model = m;
view = v;
//view.basicDisplay(model.getData()); // basicDisplay method from View class prints FootballPlayer objects as Strings from Model class.
view.basicDisplay(model.getMembers().get(1).getAttributeName(3));
view.basicDisplay(model.getMembers().get(1).getAttribute(3));
view.basicDisplay(model.getMembers().get(1).getAttributeNames());
view.basicDisplay(model.getMembers().get(1).getAttributes());
view.basicDisplay("size of names=" + model.getMembers().get(1).getAttributeNames().size());
view.basicDisplay("size of attributes=" + model.getMembers().get(1).getAttributes().size());
}
}
FootballPlayer.java:
package Model;
import java.util.ArrayList;
public class FootballPlayer extends Person implements TableMember { // Used "extends" keyword to inherit attributes from superclass Person, while using "implements" to implement methods from TableMember interface.
private int number; // Creating private attribute for int number.
private String position; // Creating private attribute for String position.
public FootballPlayer(String name, int feet, int inches, int weight, String hometown, String highSchool, int number, String position) // Full parameter constructor for FootballPlayer object (using "super" keyword to incorporate attributes from superclass).
{
super(name, feet, inches, weight, hometown, highSchool); // Used super keyword to include attributes from superclass.
this.number = number; // Value assigned from getNumber method to private number instance variable for FootballPlayer object.
this.position = position; // Value assigned from getPosition method to private position instance variable for FootballPlayer object.
}
public FootballPlayer() // No parameter constructor for FootballPlayer object.
{
this.number = 0; // Default value assigned to private number instance variable under no parameter constructor for FootballPlayer object.
this.position = "N/A"; // Default value assigned to private position instance variable under no parameter constructor for FootballPlayer object.
}
Override
public String getAttribute(int n) // getAttribute method that is implemented from interface.
{
switch (n) { // Switch statement for each attribute from each FootballPlayer object. Including two local attributes, denoted by this. While the others are denoted by "super".
case 0:
return String.valueOf(this.number); // Use of the dot operator allowed me to discover String.valueOf method to output int attributes as a string.
case 1:
return this.position;
case 2:
return super.getName();
case 3:
return super.getHeight().toString();
case 4:
return String.valueOf(super.getWeight());
case 5:
return super.getHometown();
case 6:
return super.getHighSchool();
default:
return ("invalid input parameter");
}
}
Override
public ArrayList<String> getAttributes() // getAttributes ArrayList method that is implemented from interface.
{
ArrayList<String> getAttributes = new ArrayList<>();
for(int i = 0; i <= 6; i++){ // For loop to add each attribute to the getAttributes ArrayList from getAttributes method.
getAttributes.add(getAttribute(i));
}
return getAttributes;
}
Override
public String getAttributeName(int n) // getAttributeName method implemented from interface.
{
switch (n) { // Switch statement for the name of each attribute from each FootballPlayer object.
case 0:
return "number";
case 1:
return "position";
case 2:
return "name";
case 3:
return "height";
case 4:
return "weight";
case 5:
return "hometown";
case 6:
return "highSchool";
default:
return ("invalid input parameter");
}
}
Consider the following code:
static void Main(string[] args) { int a; Sample1(ref a); Console.WriteLine(a); Sample2(out int b); Console.WriteLine(b); } static void Sample1(ref int value) { value = 2; } static void Sample2(out int value) { value = 4; }
Which of the following is true regarding the given code?
a. The error "Use of unassigned local variable a" will appear during compilation.
b. Line 4 will print the value of variable a as 2.
c. Line 6 will print the value of variable b as 2.
d. The error "Multiple declaration of the value variable" will occur during compilation.
Answer:
Use of unassigned local variable `a'
Explanation:
Required
What is true about the code
After declaring variable a as integer, i.e.
int a
For the program, a has to be initialized with an integer value
e.g. a = 5;
Initializing a will prevent the use of unassigned local variable error.
Since a is not initialized in the program, the program will return the above error for variable a.
multimedia is an effective tool used in different fields such as business and education true or false
Answer:
True
Explanation:
Multimedia is used in many fields. It is basically the ability to express something in many different ways. This allows you to more easily demonstrate a product, idea, or even a theory. Since this can be through art, video, presentation, text, live, etc. It allows you to find the best format for the specific product or idea that you are trying to present to a group of viewers. That is why it is an effective tool for various fields since it can just as easily help a company sell a product as well as help a teacher express a mathematical concept.
Identify the hardware components in your own computer. If you don't have a computer, use a friend's, or one at work or in an NVCC lab. The following list shows the components you should identify and how to find the information on a Windows computer. Describe model computer: type (laptop, desktop, notebook, tablet, etc.) Indicate your manufacturer (HP, Apple: iPad, MacBook Air, etc., Lenovo, Dell, etc.) of the computer. Input devices (include internal and external devices) - they usually have a model name and number somewhere on the device. Output devices (include internal and external devices) - they usually have a model name and number somewhere on the device. Storage devices (include internal and external devices, and how much data each can hold) - Open Windows Explorer and right click on a drive name to open its properties. Amount of RAM - Open System Properties in the Windows Control Panel. Type and speed of CPU - Open System Properties in the Windows Control Panel. Ports (number and type) - Look for jacks into which a connector can be plugged on the front, back and sides of the machine. Compare the jacks to pictures in your textbook.
Solution :
A friend of mine have an old version of computer PC having the following components :
Input devices
Model name of the keyboard -- PUNTA , model number -- P-KB515
Model name of the mouse -- PUNTA, model number -- P-KB515
Output devices
Speaker : COMPAQ
Monitor : ACER, Model Number --- EB192Q
Storage : 500 MB capacity hard disk
RAM : 2 GB
Processor : Intel Pentium dual E1260 at the rate 1.80 GHz
It is provided with audio jacks
the combination of hardware and software assembly accomplish some specific task as how...?
Answer:
A computing system can be referred to as a combination of hardware and software forms created to intentionally interact in specific ways such that the combination of both is able to achieve certain tasks.
Explanation:
Whilst a hardware refers to all the visible parts of the computing system such as the Visual Display Monitor or Screen, Keypads or Keyboards, Mouse and other input devices such as the camera, storage devices etc, the Software refers to intangible part - the logical instructions (machine language) which instructions the hardware on what or what not to do.
Cheers
Given the following tree, use the hill climbing procedure to climb up the tree. Use your suggested solutions to problems if encountered. K is the goal state and numbers written on each node is the estimate of remaining distance to the goal.
Given the following snippet of code, answer the following two questions based on the code: typedef enum {Sun, Mon, Tue, Wed, Thu, Fri, Sat} days; days x = Mon, y = Sat; while (x != y) { x++; } y++; printf("x = %d, y = %d", x, y); 1. What value will be printed for variable x? [ Select ] . 2. What value will be printed for variable y? [ Select ]
Answer:
1) The value of x will be 6.
2) The value of y will be 7.
Explanation:
1) The value of x will be 6.
The enum values are labeled by default from 1. This means that Sun = 1, Mon = 2, Tue = 3 and so on.
So, x = Mon = 2 and y = Sat = 6
x increases up to y = 6 in the while loop.
and then y also increments by 1.
2)So the value of y = 7.
You will need actual printf("Sun") or printf("Mon") for printing the actual text for the enum.
Define a class Person that represents a person. People have a name, an age, and a phone number. Since people always have a name and an age, your class should have a constructor that has those as parameters.
Answer:
public class Person {
String name;
int age;
String phoneNumber;
public Person(String name, int age, String phoneNumber){
this.name = name;
this.age = age;
this.phoneNumber = phoneNumber;
}
}
Explanation:
The code above is written in Java.
The following should be noted;
(i) To define a class, we begin with the keywords:
public class
This is then followed by the name of the class. In this case, the name is Person. Therefore, we have.
public class Person
(ii) The content of the class definition is contained within the block specified by the curly bracket.
(iii) The class contains instance variables name, age and phoneNumber which are properties specified by the Person class.
The name and phoneNumber are of type String. The age is of type int. We therefore have;
String name;
int age;
String phoneNumber;
(iv) A constructor which initializes the instance variables is also added. The constructor takes in three parameters which are used to respectively initialize the instance variables name, age and phoneNumber.
We therefore have;
public Person(String name, int age, String phoneNumber){
this.name = name;
this.age = age;
this.phoneNumber = phoneNumber;
}
(v) Notice also that a constructor has the same name as the name of the class. In this case, the constructor's name is Person.
Answer:
The class and constructor in C++ is as follows:
class Person {
public:
string name; int age; int phone;
Person (string x, int y) {
name = x; age = y;
}
};
Explanation:
This defines the class
class Person {
The specifies the access specifier
public:
This declares the attributes; name, age and phone number
string name; int age; int phone;
This defines the constructor for the name and age
Person (string x, int y) {
This gets the name and age into the constructor
name = x; age = y;
}
};
With what software tool can you see the applications that are currently runni
your computer?
Application Manager
Task Scheduler
Task Manager
Device Manager
None of the above
Answer:
Task Manager
Explanation:
On windows, you can press Ctrl + Esc and it will open Task Manager.
You will see all the currently running programs and the amount of resources they are currently using.
Viết chương trình kiểm tra số nguyên dương N có phải là số nguyên tố không?
Can you help me in this question
Answer:
6 2 and 0
Explanation:
This algorithm doesn't work if the list is not ordered ascending.
In this example it is not, and indeed the item "1" is never found.
first cycle: first=0, last=12 so midpoint=6
second cycle: first=0, last=5 so midpoint=2
last cycle: first=0, last=1 so midpoint=0
then last is assigned -1 so the while statement is no longer true.
Design a function int maxDigit (int num) to find and return the greatest digit from the arguments value num.
Also write a function void result() by passing parameters to print the greatest digit.
please tell in java programming
Answer:
Below is the required JAVA Code:
Explanation:
public static int largestDigit(int n) {
if (n < 0) {
return largestDigit(-1 * n);
} else if (n == 0) {
return 0;
} else {
int digit = n % 10;
int maxDigit = largestDigit(n / 10);
if (digit > maxDigit)
maxDigit = digit;
return maxDigit;
}
}
\color{red}Method\;tested\;in\;a\;complete\;java\;program\;if\;you\;are\;interested.
public class LargestDigitRecursive {
public static int largestDigit(int n) {
if (n < 0) {
return largestDigit(-1 * n);
} else if (n == 0) {
return 0;
} else {
int digit = n % 10;
int maxDigit = largestDigit(n / 10);
if (digit > maxDigit)
maxDigit = digit;
return maxDigit;
}
}
public static void main(String[] args) {
System.out.println(largestDigit(14263203));
System.out.println(largestDigit(845));
System.out.println(largestDigit(52649));
System.out.println(largestDigit(3));
System.out.println(largestDigit(0));
System.out.println(largestDigit(-573026));
System.out.println(largestDigit(-2));
}
}
OUTPUT:
6
8
9
3
0
7
2
In a paragraph, describe in detail a practical real-world example of where you would implement a singly-linked list and why a singly-linked list is best for this use. Do not list the properties of a singly-linked list....
Rather identify a real-world example or application. If you identify this through research, cite your source.
Answer:
travel
Explanation:
One real world example of a singly-linked list would be travel. Imagine that you want to take a trip to your nearest neighbor state. To do so you would need to take a 2 buses and a train, but you can't just take any or in any order you wish. You first need to take the first bus at your current location, get off at the train station, take that train to the final stop, get off and take the bus to the final destination. Meaning there is a sequence of connected events that you must follow in order to get to your destination and the same opposite sequence of events to get back. This is exactly like a singly-linked list.
Thành phần bên trong nào thực hiện các tính toán và các phép toán logic?
a. Bộ vi xử lý
b. ROM_BIOS
c.Các chip RAM
d. Bo mạch chủ
Answer:
A
Explanation:
Functions should contain only the code that performs a single task.
O True
O False
Answer:
false
Explanation:
function should contain more codes
What type of editor is used to edit HTML code?What type of editor is used to edit HTML code?
For learning HTML we recommend a simple text editor like Notepad (PC) or TextEdit (Mac).
mark me brainliestt :))
Answer:
If you want to use HTML editor in windows, you can use notepad. And if you want to use HTML editor on your phone than you need to install any editor on your phone.
Explanation:
If you want to use another app than notepad in pc, laptop, mac, OS or Linux, you can download a editor known as Visual Studio Code. If you want to do another language you can also do it in it. You can do all programming languages in it.
Saved In order to be used as a primary key, which of these characteristics must an attribute possess with respect to a single instance of the entity? Select all that apply. There must be a maximum of one attribute instance. There must be many instances of the attribute There must be at most one entity instance that each attribute instance describes. There must be at least one instance of the attribute. There must be zero or more instances of the attribute. Question 2 (2 points) True or false: A singular attribute is also known as a unique attribute. True False Question 3 (3 points) Saved Relationship names and types of relationship maxima or minima that each could have are listed below. Match each relationship in the list below to the type of relationship maxima or minima. Instructions: Choose your responses from the drop-down menus below. Response options cannot be used more than once. Minima is One-Zero 1 Person-Assigned Social SecurityNumber 4 Minima is Zero Zero 2 CubicleNumber-Assigned-to- Employee per shift 2 Maxima is One-Many 3. Birthdate-Recorded-for-a Person 1 Maxima is One One 4. Women-Bearing-Children Question 4 (2 points) Saved A ride-sharing app's discount system for riders is configured such that a ride discount is triggered only if at least two RiderlDs book a ride in the same Card at the same time. Which of the following is true of the relationship Ride Discount-is-Applicable?
The relationship minimum is Many-One.
The relationship minimum is Two-One.
The relationship maximum is One-Two.
The relationship minimum is One-Two.
Answer:
Saved In order to be used as a primary key, which of these characteristics must an attribute possess with respect to a single instance of the entity:
There must be a maximum of one attribute instance.
There must be many instances of the attribute.
There must be at most one entity instance that each attribute instance describes.
There must be at least one instance of the attribute.
A singular attribute is also known as a unique attribute. True
Saved Relationship names and types of relationship maxima or minima that each could have are listed below. True
Explanation:
Why might you use a navigation form instead of tab pages? The navigation form allows for several levels and sublevels to be collected. The navigation form allows for duplicate records of information to be collected. The navigation form requires all entries to be complete before adding to a database. The navigation form requires report headers and footers to make publication neater.
Answer:
Access includes a Navigation Control that makes it easy to switch between various forms and reports in your database. A navigation form is simply a form that contains a Navigation Control. Navigation forms are a great addition to any desktop database.
Explanation:
yes
Answer:
answer c
Explanation:
correct answer on edge
In this lab, you complete a prewritten C++ program that computes the largest and smallest of three integer values. Instructions Two variables named largest and smallest are declared for you. Use these variables to store the largest and smallest of the three integer values. You must decide what other variables you will need and initialize them if appropriate. Your program should prompt the user to enter 3 integers. Write the rest of the program using assignment statements, if statements, or if else statements as appropriate. There are comments in the code that tell you where you should write your statements. The output statements are written for you. Execute the program by clicking the Run button at the bottom of the screen. Using the input of -50, 53, 78, your output should be: The largest value is 78 The smallest value is -50
Answer:
The program in C++ is as follows
#include <iostream>
using namespace std;
int main(){
int n1, n2, n3, largest, smallest;
cin>>n1>>n2>>n3;
if(n1 >= n2 && n1>=n3){ largest = n1; }
else if(n2 >= n1 && n2>=n3){ largest = n2; }
else{ largest = n3; }
if(n1 <= n2 && n1<=n3){ smallest = n1; }
else if(n2 <= n1 && n2<=n3){ smallest = n2; }
else{ largest = n3; }
cout<<"Smallest: "<<smallest<<endl;
cout<<"Largest: "<<largest<<endl;
return 0;
}
Explanation:
Declare all variables
int n1, n2, n3, largest, smallest;
Get input for the three numbers
cin>>n1>>n2>>n3;
Check if n1 is the largest
if(n1 >= n2 && n1>=n3){ largest = n1; }
Check if n2 is the largest
else if(n2 >= n1 && n2>=n3){ largest = n2; }
Otherwise, n3 is the largest
else{ largest = n3; }
Check if n1 is the smallest
if(n1 <= n2 && n1<=n3){ smallest = n1; }
Check if n2 is the smallest
else if(n2 <= n1 && n2<=n3){ smallest = n2; }
Otherwise, n3 is the smallest
else{ largest = n3; }
Print the smallest
cout<<"Smallest: "<<smallest<<endl;
Print the largest
cout<<"Largest: "<<largest<<endl;
Need help ASAP!
Which of the following statements is true?
1) A PCAP format is handy because there is no additional tool to read it.
2) Network traffic can be captured using the Tcpdump protocol analyzer.
3) Normally, traffic inside a network is recorded within a capture file.
4) Sniffer is a program to save the network capture to a specific format.
The statement that is true is that Network traffic can be captured using the Tcpdump protocol analyzer.
How is network traffic captured?Network traffic can be taken in using the Tcpdump. This is known to be a kind of packet sniffer that is often used to look and record network traffic on an interface.
An example is when a person capture 1,000 packets through the use of tcpdump. One can then analyze network traffic by using actual network traffic analyzer, which is as Wireshark.
Learn more about Network traffic from
https://brainly.com/question/26199042
Marketing có phải là bán hàng hay không? Giải thích?
Answer:
Sự khác biệt giữa bán hàng và tiếp thị là bán hàng tập trung vào làm việc trực tiếp với khách hàng tiềm năng để khiến họ chuyển đổi, trong khi tiếp thị tập trung vào việc khơi dậy sự quan tâm đến sản phẩm của bạn.
Answer:
Marketing không phải là bán hàngg
Explanation:
Nó là công cụ hỗ trợ cho việc bán hàng
In the U.S. fuel efficiency of cars is specified in miles per gallon (mpg). In Europe it is often expressed in liters per 100 km. Write a MATLAB user- defined function that converts fuel efficiency from mpg to liters per 100 km. For the function name and arguments, use Lkm-mpgToLpkm (mpg). The input argument mpg is the efficiency in mi/gl, and the output argument Lkm is the efficiency in liters per 100 km (rounded to the nearest hundredth). Use the function in the Command Window to:________.
(a) Determine the fuel eficiency in liters per 100 km of a car whose fuel effi- ciency is 21 mi/gal.
(b) Determine the fuel efficiency in liters per 100 km of a car whose fuel effi- ciency is 36 mi/gal.
Answer and Explanation:
Using MATLAB code:
Function Lkm = Lkm-mpgToLpkm (mpg)
Lkm= mpg*1.60934/3.78541;
Lkm= Lkm^(-1);
Lkm= Lkm*100;
%the code above defines a function Lkm and takes argument/input to its parameter mpg(miles per gallon) and then returns/output Lkm which is the litres per kilometers conversion from miles per gallon input.
end
To call the function written above with argument 30 mpg, we write:
Lkm= Lkm-mpgToLpkm (30)
Think about that the C, B and S parameters of a Cache. Think about what happens to compulsory, capacity, conflict misses, if only each of the following parameter changed (the other two are kept the same)?
(i) C is increased (S, B same)
(ii) S is increased (C, B Same)
(iii) B is increased (C, S Same)
Answer:
(i) C is increased (S, B same)
Explanation:
Cache are items which are stored in the computer at a hidden place. These are sometimes unwanted and they may hinder the speed and performance of the device. They exist to bridge speed gap.
You've decided to build a new gaming computer and are researching which power supply to buy. Which component in a high-end gaming computer is likely to draw the most power
Answer:
Following are the solution to the given question:
Explanation:
In this order, it is typically the GPU and CPU. The most important way to consider is to look at the details of the components to enhance watts. Add up to 100 watts so make sure it was safe and ok. Just buy a PSU with an extra 100 watts of leeway for your system. This is indeed a slight price difference.
Every Java statement ends with: *
Period
Colon
Double quote
Semicolon
Answer:
semicolon is the answer
Design traffic lights at an intersection of a city. North and South (up and down) are going to be a main highway, East and West (right and left) will be a smaller cross street. There will be no turn signals and no cross walks. You only need to build/code one set of lights for each street (one set of green, yellow, and red for the highway, and another set for the cross street). You do not need to build actual traffic lights or an intersection.
Answer:
Explanation:
The following code is written in Java. In order to code this efficiently, I created a class for the trafficLights. The class contains the currentLight, and the streetType as variables and contains a constructore, getter and setter methods, and a method to turn to the next light in the sequence. Then I created 4 objects of TrafficLights for the highways and the streets.
class Brainly {
public static void main(String[] args) {
TrafficLights highwaySouth = new TrafficLights("Highway", "green");
TrafficLights highwayNorth = new TrafficLights("Highway", "green");
TrafficLights streetEast = new TrafficLights("Street", "yellow");
TrafficLights streetWest = new TrafficLights("Street", "red");
}
}
class TrafficLights {
String streetType, currentLight;
public TrafficLights(String streetType, String currentLight) {
this.streetType = streetType;
this.currentLight = currentLight;
}
public void nextLight() {
if (this.currentLight == "green") {
this.currentLight = "yellow";
} else if (this.currentLight == "yellow") {
this.currentLight = "red";
} else {
this.currentLight = "green";
}
}
public String getStreetType() {
return streetType;
}
public void setStreetType(String streetType) {
this.streetType = streetType;
}
public String getCurrentLight() {
return currentLight;
}
public void setCurrentLight(String currentLight) {
this.currentLight = currentLight;
}
}
Questions to ask people on how corona has affected the religion sectors
Answer:
bcoz of corona all churches and temples are closed and pilgrimage are cancelled
Heinrich Koch is a second-year college student. Last semester his best friend had his laptop stolen. The laptop was an old computer that he planned to replace soon, but the greatest loss was his data: he had not performed a backup and all his data was lost. Heinrich himself does not perform data backups but knows that he needs to do that on a regular basis. He has decided to use an online backup service that will automatically back up his data whenever it changes. Evaluate and compare reviews of online backup services. Consider iDrive, Carbonite, Acronis True Image, BackBlaze, and others you might find in your research. Recommend a service that you consider the best solution for Heinrich. Discuss your reviews and mention speed, security, and features in your recommendation.
Answer:
Acronis True Image is the one I would recommend out of these mentioned online backup services.
Explanation:
The evaluations and reviews of each of the online backup services are as follows:
a. iDrive
For this, we have:
Speed = 60% - fair
Security = 100% - excellent
Privacy = 88% - very good
Features = 95% - excellent
Pricing = 85% - Very good
Because of its various features, pricing, and usability, IDrive reviews suggest that it is a very efficient online backup solution. However, there have been complaints concerning its speed and the fact that there are no monthly plans available.
b. Carbonite
For this, we have:
Speed = 60% - fair
Security = 100% - excellent
Privacy = 87% - very good
Pricing = 85% - very good
File backup and restoration = 75% - good
Carbonite reviews reveal that it is simple to use and provides limitless backup for one device. The main drawback is that it has extremely poor backup speeds.
c. Acronis True Image
This is fast, simple and intuitive
It has complete control over the backup updates, including how and when they occur.
It is not expensive.
Acrnonis True image is a powerful backup storage service. It enables data and file backup and restoration from USB drives.
Many reviewers of Acrnonis True image have stated that they have had no issues with its service, that it is worth purchasing, and that there are no concerns.
d. Backblaze
For this, we have:
Speed = 75% - good
Security = 75% - good
Privacy = 70% - decent
Pricing = 100% - excellent
Support = 95% - excellent
Features = 65% - decent
File back-up and restoration = 70% - decent
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Recommendation
Acronis True Image is the one I would recommend out of these mentioned online backup services. This is due to the fact that it delivers a large amount of accurate and high-quality data storage. It is quick, simple and intuitive, which is what most people care about. Furthermore, reviewers have stated that this service is quite effective and that there have been very few issues with it. The other services demonstrate that their services have flaws, such as lack of customization and slowness.
Given two regular expressions r1 and r2, construct a decision procedure to determine whether the language of r1 is contained in the language r2; that is, the language of r1 is a subset of the language of r2.
Answer:
Test if L(M1-2) is empty.
Construct FA M2-1 from M1 and M2 which recognizes the language L(>M2) - L(>M1).
COMMENT: note we use the algorithm that is instrumental in proving that regular languages are closed with respect to the set difference operator.
Test if L(M2-1) is empty.
Answer yes if and only if both answers were yes.
Explanation:
An algorithm must be guaranteed to halt after a finite number of steps.
Each step of the algorithm must be well specified (deterministic rather than non-deterministic).
Three basic problems:
Given an FA M and an input x, does M accept x?
Is x in L(M)
Given an FA M, is there a string that it accepts?
Is L(M) the empty set?
Given an FA M, is L(M) finite?
Algorithm for determining if M accepts x.
Simply execute M on x.
Output yes if we end up at an accepting state.
This algorithm clearly halts after a finite number of steps, and it is well specified.
This algorithm is also clearly correct.
Testing if L(M) is empty.
Incorrect "Algorithm"
Simulate M on all strings x.
Output yes if and only if all strings are rejected.
The "algorithm" is well specified, and it is also clearly correct.
However, this is not an algorithm because there are an infinite number of strings to simulate M on, and thus it is not guaranteed to halt in a finite amount of time.
COMMENT: Note we use the algorithm for the first problem as a subroutine; you must think in this fashion to solve the problems we will ask.
Correct Algorithm
Simulate M on all strings of length between 0 and n-1 where M has n states.
Output no if and only if all strings are rejected.
Otherwise output yes.
This algorithm clearly halts after a finite number of steps, and it is well specified.
The correctness of the algorithm follows from the fact that if M accepts any strings, it must accept one of length at most n-1.
Suppose this is not true; that is, L(M) is not empty but the shortest string accepted by M has a length of at least n.
Let x be the shortest string accepted by M where |x| > n-1.
Using the Pumping Lemma, we know that there must be a "loop" in x which can be pumped 0 times to create a shorter string in L.
This is a contradiction and the result follows.
COMMENT: There are more efficient algorithms, but we won't get into that.
Testing if L(M) is finite
Incorrect "Algorithm"
Simulate M on all strings x.
Output yes if and only if there are a finite number of yes answers.
This "algorithm" is well specified and correct.
However, this is not an algorithm because there are an infinite number of strings to simulate M on, and thus it is not guaranteed to halt in a finite amount of time.
COMMENT: Note we again use the algorithm for the first problem as a subroutine.
Correct Algorithm
Simulate M on all strings of length between n and 2n-1 where M has n states.
Output yes if and only if no string is accepted.
Otherwise output no.
This algorithm clearly halts after a finite number of steps, and it is well specified.
The correctness of the algorithm follows from the fact that if M accepts an infinite number of strings, it must accept one of length between n and 2n-1.
This builds on the idea that if M accepts an infinite number of strings, there must be a "loop" that can be pumped.
This loop must have length at most n.
When we pump it 0 times, we have a string of length less than n.
When we pump it once, we increase the length of the string by at most n so we cannot exceed 2n-1. The problem is we might not exceed n-1 yet.
The key is we can keep pumping it and at some point, its length must exceed n-1, and in the step it does, it cannot jump past 2n-1 since the size of the loop is at most n.
This proof is not totally correct, but it captures the key idea.
COMMENT: There again are more efficient algorithms, but we won't get into that.
Other problems we can solve using these basic algorithms (and other algorithms we've seen earlier this chapter) as subroutines.
COMMENT: many of these algorithms depend on your understanding of basic set operations such as set complement, set difference, set union, etc.
Given a regular expression r, is Lr finite?
Convert r to an equivalent FA M.
COMMENT: note we use the two algorithms for converting a regular expression to an NFA and then an NFA to an FA.
Test if L(M) is finite.
Output the answer to the above test.
Given two FAs M1 and M2, is L(M1) = L(M2)?
Construct FA M1-2 from M1 and M2 which recognizes the language L(>M1) - L(>M2).
COMMENT: note we use the algorithm that is instrumental in proving that regular languages are closed with respect to the set difference operator.
Test if L(M1-2) is empty.
Construct FA M2-1 from M1 and M2 which recognizes the language L(>M2) - L(>M1).
COMMENT: note we use the algorithm that is instrumental in proving that regular languages are closed with respect to the set difference operator.
Test if L(M2-1) is empty.
Answer yes if and only if both answers were yes.
After performing addition operation such as AX=18, BX=19 which Flags will be
affected
Answer:
Carry Flag (CF) - this flag is set to 1 when there is an unsigned overflow. ...
Zero Flag (ZF) - set to 1 when result is zero. ...
Sign Flag (SF) - set to 1 when result is negative. ...
Overflow Flag (OF) - set to 1 when there is a signed overflow.
