Mối quan hệ giữa đối tượng và lớp
1. Lớp có trước, đối tượng có sau, đối tượng là thành phần của lớp
2. Lớp là tập hợp các đối tượng có cùng kiểu dữ liệu nhưng khác nhau về các phương thức
3. Đối tượng là thể hiện của lớp, một lớp có nhiều đối tượng cùng thành phần cấu trúc
4. Đối tượng đại diện cho lớp, mỗi lớp chỉ có một đối tượng

Complete Question:

A technician needs to manage a Linux-based system from the GUI remotely.  Which of the following technologies should the technician deploy?

A. RDP  

B. SSH  

C. VNC  

D. Telnet

Answer:

Managing a Linux-based System from the GUI Remotely

The technology that the technician should deploy to manage the Graphic User Interface (GUI) remotely is:

C. VNC

Explanation:

VNC stands for Virtual Network Computing. This computing technology enables a remote user to access and control another computer to execute commands. It acts as a cross-platform screen-sharing system and is used to remotely access and control another computer. VNC makes a computer screen, keyboard, and mouse available to be seen and used from a remote distance.  The remote user does everything from a secondary device without being in front of the primary computer or device.  An example of a good VNC is TeamViewer.

Answer:

Data use policies

Explanation:

Technically data use policies are not specifically made to protect user privacy, however it also should not violate user privacy. Data use policies are required by law. They are compulsory disclosures that list the various ways in which data in the form of personal data of individuals is collected, shared or used by digital companies(companies that operate on the internet, make use of email lists, etc ) are used.

Incomplete question. Here's the full question:

Data-Time Inc. is a company that manages databases for a large city in Colorado. Included in these databases is information collected from the city’s homeless shelters and free clinics. Specifically, the databases contain personal information of the users of these services over the past 10 years; this includes people’s Social Security numbers and health records.

This data is highly secure and only accessible to the employees of Data-Time Inc. Employees are given a laptop when they are hired which allows them to access the database remotely. Unfortunately, one of these laptops is stolen and the security of the database is compromised.

A majority of the people whose information was compromised are homeless; therefore there is no easy way to contact them in order to alert them of the security breach. How should Data-Time Inc. manage this breach in security?

Explanation:

Since the emphasis is not on reversing the breach that has occurred, but on managing the level of security damage that could occur, it is important measures are directed towards preventing unauthorized access to sensitive information.

For example, the Media Access Control Address (MAC address) of the laptop if known could be greylisted from accessing the server that contains the sensitive information.

Answer:

The answer is below

Explanation:

Considering the situation and the available options above, the following configurations are needed for internet communications:

B. DNS server address: this matches the domain name to the IP address of a website such that browsers can bring internet resources.

C. Default gateway address: this uses the internet protocol suites and serves as a router to other networks in the absence of other route specifications that could match the destination IP address of a packet.

G. IP address including a subnet mask (IPv4) or subnet prefix length (IPv6): this is used by the internet-connected device to receive messages.

Answer:

Explanation:

The following code is written in Java. It is a function that creates a Random object to generate random values, then uses those values to choose a random rank and suit using switch statements. It then saves the rank and suit into a String variable in the correct format and finally prints the card that was picked to the screen. The function was called 4 times in the main method and the output can be seen in the attached image below.

public static void randomCardGenerator() {

       Random rand = new Random();

       int rank = rand.nextInt(14)+1;

       int suit = rand.nextInt(4)+1;

       String chosenCard = "";

       switch (rank) {

           case 1: chosenCard += "Ace"; break;

           case 2: chosenCard += "1"; break;

           case 3: chosenCard += "2"; break;

           case 4: chosenCard += "3"; break;

           case 5: chosenCard += "4"; break;

           case 6: chosenCard += "5"; break;

           case 7: chosenCard += "6"; break;

           case 8: chosenCard += "7"; break;

           case 9: chosenCard += "8"; break;

           case 10: chosenCard += "9"; break;

           case 11: chosenCard += "10"; break;

           case 12: chosenCard += "Jack"; break;

           case 13: chosenCard += "Queen"; break;

           case 14: chosenCard += "Kind"; break;

           default: System.out.println("Wrong Value");

       }

       chosenCard += " of ";

       switch (suit) {

           case 1: chosenCard += "Clubs"; break;

           case 2: chosenCard += "Diamonds"; break;

           case 3: chosenCard += "Hearts"; break;

           case 4: chosenCard += "Spades"; break;

           default: System.out.println("Invalid Suit");

       }

       System.out.println(chosenCard);

   }

Answer:

Explanation:

The following is written in Java and creates the ArrayComputing class. It uses the constructor to create the infinite loop that only breaks when the user enters a -99. After every input number it goes adding the correct values to the variables. Once it is done the user can call any of the getter methods to get the variable values as well as calculate the average.

import java.util.Scanner;

class ArrayComputingApp {

   public static void main(String[] args) {

       ArrayComputing arrayComputing = new ArrayComputing();

       System.out.println("Average: " + arrayComputing.getAverage());

       System.out.println("Greatest: " + arrayComputing.getGreatest());

       System.out.println("Least: " + arrayComputing.getLeast());

       System.out.println("Sum: " + arrayComputing.getSum());

   }

}

class ArrayComputing {

   int greatest, least, sum, average;

   int count = 0;

   Scanner in = new Scanner(System.in);

   public ArrayComputing() {

       while (true) {

           System.out.println("Enter a number or -99 to exit: ");

           int num = in.nextInt();

           if (num == -99) {

               break;

           }

           if (num > this.greatest) {

               this.greatest = num;

           }

           if (this.count == 0) {

               this.least = num;

           } else {

               if (num < this.least) {

                   this.least = num;

               }

           }

           this.sum += num;

           this.count += 1;

       }

   }

   public int getAverage() {

       this.average = sum / count;

       return this.average;

   }

   public int getGreatest() {

       return greatest;

   }

   public int getLeast() {

       return least;

   }

   public int getSum() {

       return sum;

   }

}

Answer:

Explanation:

so this is what "format" is about,   it's saying what do the ones and zeros represent.   b/c the bits can represent lots of different things ,  like letters with ascii code ,   and that's got several types.  some are 8 bits,  some are 16 bits,  the questions  you've shown are in groups of 5 which is really not a "thing" in binary,  it's always by twos,   without some type of  "frame work"  around the bits, we won't know what they represent,  if that is helping?   the important part is what is the "frame work"   that these bits are in.

all of your questions seem to have some  "art"  thing going on,  they make some kinda of binary artwork,  for what they are saying, that's not what's important.  Other than if they form  palindromes,   maybe that's what the questions are really about, how these do from palindromes, that is, they read the same backwards as forwards... I know.. why would anyone read backwards.. but a computer can do that pretty quickly,  sooo sometimes to check,  it will read  forwards and backwards.. but when there is a palindrome,  the computer is "confused"  

this is also a big big part of  "typing"  not like on a keyboard but when you program, and you say that  your variables are of a certain type,  like a char, or a string, or a double, you are specifying how many bits will be used to represent your data.  so then when you put the ones and zeros into the memory ,  ( think RAM)  then it's stored in groups of what ever size you've determined.    hmmmm   does this help?

Answer:

see your answer in image

mark me brainlist

The amount of disk space in sectors that would be required to store 300,000 records is equal to 75,000 sectors.

Given the following data:

First of all, we would determine the number of logical records that can be held by each sector as follows:

Number of logical records per sector = 512/120

Number of logical records per sector = 4.3 ≈ 4.0.

Now, we can calculate the required disk space to store 300,000 records:

Disk space = 300,000/4

Disk space = 75,000 sectors.

For the tracks, we have:

Disk space in tracks = 75,000/96

Disk space in tracks = 781.25 ≈ 782.

Disk space in tracks = 782 tracks.

For the surfaces, we have:

Disk space in surfaces = 782/110

Disk space in surfaces = 7.10 ≈ 8.

Disk space in surfaces = 8 surfaces.

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Answer:

it is....insert tab..B

Explanation:

insert tab includes editing options

Answer:

a. Youthful

Explanation:

The river gets its water from youth stage fluvial water. The river meanders from side to side. East Brownsville will be less stable in international boundary in terms of physical position on the landscape because its base level drops.

Answer:

double decimal1, decimal2;

int whole;

Explanation:

Required

Declare 2 decimals and 1 int.

The syntax to declare a variable is:

data-type variable-name;

To declare decimal, we simply make use of double or float data types.

So, we have:

double decimal1, decimal2; ----> for the decimal variables

And

int whole; ---- for the whole number

Answer:

The answer is "102.2 milliseconds".

Explanation:

Given:

Size of file = 15 MiB

The transmission rate of the total link= 49.7 Gbps

User = 7

Time of setup = 84.5 ms

calculation:

[tex]1\ MiB = 2^{20} = 1048576\ bytes\\\\1\ MiB = 2^{20 \times 8}= 8388608\ bits\\\\15\ MiB= 8388608 \times 15 = 125829120\ bits\\\\[/tex]

So,

Total Number of bits [tex]= 125829120 \ bits[/tex]

Now

The transmission rate of the total link= 49.7 Gbps

[tex]1\ Gbps = 1000000000\ bps\\\\49.7 \ Gbps = 49.7 \times 1000000000 =49700000000\ bps\\\\FDM \ \ network[/tex]

[tex]\text{Calculating the transmission rate for 1 time slot:}[/tex]

[tex]=\frac{ 49700000000}{7} \ bits / second\\\\= 7100000000 \ bits / second\\\\ = \frac{49700000000}{(10^{3\times 7})} \ in\ milliseconds\\\\ =7100000 \ bits / millisecond[/tex]

Now,

[tex]\text{Total time taken to transmit 15 MiB of file} = \frac{\text{Total number of bits}}{\text{Transmission rate}}[/tex]

[tex]= \frac{125829120}{7100000}\\\\= 17.72\\\\[/tex]

[tex]\text{Total time = Setup time + Transmission Time}\\\\[/tex]  

                 [tex]= 84.5+ 17.72\\\\= 102.2 \ milliseconds[/tex]

Answer:

Download the financial report as =FDS codes with cell referencing.

Explanation:

An excel is a spreadsheet that is developed by the Microsoft company for the Windows operating system. It can be also used in iOS, macOS and Android. It has many features including  graphing tools, calculation, pivot tables, etc.

In excel the fastest way to pull out a financial data from an application into the Excel as the refreshable formulas which can be edited or can be uploaded later on is by downloading the financial report as an +FDS code with the cell referencing.

In excel, cell refreshing is a way to refer to a cell in the formula.

Answer:

This can be done by a greedy solution. The algorithm does the following:  

Put song 1 on CD1.

For song 1, if there's space left on the present CD, then put the song on the present CD. If not, use a replacement CD.

If there are not any CDs left, output "no solution".

Explanation:  

The main thing is prove the correctness, do that by the "greedy stays ahead argument". For the primary song, the greedy solution is perfect trivially.  

Now, let the optimal solution match the greedy solution upto song i. Then, if the present CD has space and optimal solution puts song (i+1) on an equivalent CD, then the greedy and optimal match, hence greedy is not any worse than the optimal.Else, optimal puts song (i + 1) on subsequent CD. Consider an answer during which only song (i + 1) is moved to the present CD and zip else is modified. Clearly this is often another valid solution and no worse than the optimal, hence greedy is not any worse than the optimal solution during this case either. This proves the correctness of the algorithm. As for every song, there are constantly many operations to try to do, the complexity is O(n).

Answer:

Following are the code to the given question:

#include<stdio.h>//include header file  

int main() //defining a main method

{  

   int a[100],k,x,s; //defining integer variable and an array  

   printf("Input the number of element want to insert array: ");  //print message

   scanf("%d",&x);  //input value

   printf("Enter array value: \n"); //print message  

   for(k = 0; k<x; k++)  //defining a loop that inputs values

   {  

       scanf("%d",&a[k]);  //use array to input value

   }  

   s = a[0]; //holding first array value in array

   for(k=0;k<x;k++)  //use for loop

   {  

       if(a[k]<s)  //use if block to check the smallest array value

       {  

         s=a[k];//holding smallest array value

       }  

   }  

   printf("smallest number= %d",s);//print smallest value

}  

Output:

Please find the attached file.

Explanation:

In this code an array and another integer variable "a[100], i,n, and s" is is declared, in which the array and n for input the value from the user-end.

In the next step, an "s" variable is declared that inputs the first array element value in s and use a loop to check the smallest array element and prints its value.

Answer:

Explanation:

Answer:

The answer would be A: Random

Explanation:

The random() function returns a generated random number (a pseudorandom number)

the technique used is Data Validation

Answer:

The function is as follows:

int returnsFixed(int arr [],int n){

   int retVal = -1;

   for(int i = 0; i<n;i++){

       if(i == arr[i]){

           retVal = i;

           break;

       }

   }

   return retVal;

}

Explanation:

This defines the functionl it receives the array and the length of the array

int returnsFixed(int arr [],int n){

This initializes the return value to -1

   int retVal = -1;

This iterates through the array

   for(int i = 0; i<n;i++){

This checks if i equals arr[i]

       if(i == arr[i]){

If yes, the return value (i.e. the fixed point) is set to i

           retVal = i;

And the code is exited

           break;

       } This ends the if condition

   } This ends the iteration

This returns the calculated fixed point

   return retVal;

}

The statement that is true about network protocols is that:

A network protocol is a system of principles that governs how data is delivered between devices on the same network.

Primarily, it enables linked devices to interact with one another despite variations in internal operations, architecture, or design.

The way this is done is true the use of Transmission-control protocol/Internet protocol (TCP/IP).

TCP/IP is the primary protocol or communication language of the Internet. Therefore, using a protocol other than TCP/IP can result in data loss.

Learn more about network protocol here:

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Answer:

The program in C++ is as follows:

#include <iostream>

#include <iomanip>

using namespace std;

int* sortArray(int temp [], int n){

   int tmp;

   for(int i = 0;i < n-1;i++){

 for (int j = i + 1;j < n;j++){

  if (temp[i] > temp[j]){

   tmp  = temp[i];

   temp[i] = temp[j];

   temp[j] = tmp;   }  } }

return temp;

}

float average(int temp [], int n){

   float sum = 0;

   for(int i = 0; i<n;i++){

       sum+=temp[i];    }

   return sum/n;

}

int main(){

   int n;

   cout<<"Number of temperatures: ";    cin>>n;

   while(n>10){

       cout<<"Number of temperatures: ";    cin>>n;    }

   int temp[n];

   for(int i = 0; i<n;i++){

       cout<<"Input temperature "<<i+1<<": ";

       cin>>temp[i];    }

   int *sorted = sortArray(temp, n);

   cout<<"The sorted temperature in ascending order: ";

   for( int i = 0; i < n; i++ ) {  cout << *(sorted + i) << " ";   }

   cout<<endl;

   float ave = average(temp,n);

   cout<<"Average Temperature: "<<setprecision(2)<<ave<<endl;

   cout<<"Highest Temperature: "<<*(sorted + n - 1)<<endl;

   cout<<"Lowest Temperature: "<<*(sorted + 0)<<endl;

   return 0;

}

Explanation:

See attachment for complete source file with explanation

Answer:

A class may be a structured diagram that describes the structure of the system.  

It consists of sophistication name, attributes, methods, and responsibilities.  

A mailbox and an email message have certain attributes like, compose, reply, draft, inbox, etc.

Software architecture affects:

Performance, Robustness, Distributability, Maintainability.  

Explanation:

See attachment for the Model object classes which may be utilized in the system implementation to represent a mailbox and an email message.

Advantages:

Large-scale reuse Software architecture is vital because it affects the performance, robustness, distributability, and maintainability of a system.

Individual components implement the functional system requirements, but the dominant influence on the non-functional system characteristics is that the system's architecture.

Three advantages of System architecture:

• Stakeholder communication: The architecture may be a high-level presentation of the system which will be used as attention for discussion by a variety of various stakeholders.

• System analysis: making the system architecture explicit at an early stage within the system development requires some analysis.

• Large-scale reuse:

An architectural model may be a compact, manageable description of how a system is organized and the way the components interoperate.

The system architecture is usually an equivalent for systems with similar requirements then can support large-scale software reuse..

Answer:

Answer:Data Types. Computer systems work with different types of digital data. In the early days of computing, data consisted primarily of text and ...

Answer:

Answer:In this context sound data is stored and transmitted in an analog form. Since computers represent data in digital form, (as bits and bytes) the

Answer:

The Open Software Foundation (OSF) was a not-for-profit industry consortium for creating an open standard for an implementation of the operating system Unix. It was formed in 1988 and merged with X/Open in 1996, to become The Open Group.

Explanation:

YOUR PROFILE PIC IS CUTE :)

Solution :

ENTITY 1               CARDINALITY RATIO                                     ENTITY 2

1. Student                        1 to many                                     Social security card

                      A student may have more than one          

                     social security card (legally with the

                      same unique social security number),

                     and every social security number belongs

                   to a unique.

2. Student                   Many to Many                                    Teacher

                    Generally students are taught by many

                    teachers and a teacher teaches many students.

3.ClassRoom               Many to Many                                   Wall

                      Do not forget that the wall is usually

                      shared by adjacent rooms.

4. Country                 1 to 1                                             Current President

                       Assuming a normal country under normal

                       circumstances having one president at a

                      time.

5. Course               Many to Many                               TextBook

                        A course may have many textbooks and

                       text book may be prescribed for different

                      courses.

6. Item                             Many to Many                           Order

                        Assuming the same item can appear

                         in different orders.

7. Student                       Many to Many                          Class

                        One student may take several classes.

                        Every class usually has several students.

8. Class                                 Many to 1                             Instructor

                       Assuming that every class has a unique

                        instructor. In case instructors were allowed

                        to team teach, this will be many-many.

9. Instructor                  1 to 1                                             Office

                       Assuming every instructor has only one

                      office and it is not shared. In case of offices

                     shared by 2 instructors, the relationship

                    will be 2-1. Conversely, if any instructor has a joint

                    appointment and offices in both departments,

                    then the relationship will be 1-2. In a very general

                  case, it may be many-many.

10. E-bay Auction item             1-Many                           E-bay bid

                        1 item has many bids and a bid is unique

                        to an item.

Answer:

This is worth 50 dollars.

Explanation:

١ - one

٢ - two

٣ - three

٤ - four

٥ - five

٦ - six

٧ - seven

٨ - eight

٩ - nine

٠ - zero

What you see above is the ten digits in Arabic.

Both 5 (٥) and 0 (٠) appear here, thus representing 50.

Following are the Java Program to the given question:

import java.util.Scanner; //import package for user-input

public class Count  //defining a class Count  

{

   public static int countMultiples(int low,int high,int x)//defining a method countMultiples that takes three integer parameters

   {  

       int c=0,i; //defining integer variables that hold value

       for(i=low;i<=high;i++)//defining loop that iterates value between low and high  

       {  

           if(i%x==0)//defining if block that uses % operator to check value

           {

               c+=1; //incrementing c value

           }

       }

       return c; //return c value

   }

   public static void main(String[] args)//main method  

   {  

       int l,h,x;//defining integer variable

       Scanner scnr=new Scanner(System.in); //creating scanner class object  

       l=scnr.nextInt(); //input value

       h=scnr.nextInt();//input value

       x=scnr.nextInt();//input value

       System.out.println(countMultiples(l,h,x)); //calling method and print its value

   }

}

Output:

Please find the attached file.

Program Explanation:

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