What is memory paging, and how can it facilitate virtual memory?

Answer:

Corresponding Binary numbers are as following:

A4693FBC=10100100011010010011111110111100.

B697C7A1 = 10110110100101111100011110100001.

Explanation:

A single digit hexadecimal number is a 4 bit binary number.So for each hexadecimal bit we have to find the corresponding 4 bit binary number.

A=1010

4=0100

6=0110

9=1001

3=0011

F=1111

B=1011

C=1100

and write them in the same sequence of their hexadecimal number.

A4693FBC=10100100011010010011111110111100.

B=1011

6=0110

9=1001

7=0111

C=1100

7=0111

A=1010

1=0001

B697C7A1 = 10110110100101111100011110100001.

Answer:

 The main purpose of the constructor in the computer science is to initialize the object of the class. The constructor is basically called after the allocation of the memory in the object. When the object is created, the constructor are basically used to initialize as default value.  

Constructor is also known as special type of the member function. The compiler called the constructor whenever the object has been create and the construction has similar name of the given class.

Example:

 Class test() {

   int p, r;   // variable declaration

   public:

           // constructor

           // Assigning value in the constructor

     p=5;

     r=10;

Cout<<" Constructor value\n";

}

Answer:

void printarr(int nums[],int n)

{

   cout<<"{";//printing { before the elements.

   for(int i=0;i<n;i++) // iterating over the array.

   {

       cout<<nums[i];//printing the elements.

       if(i==n-1)//if last element then come out of the loop.

       break;

       cout<<",";//printing the comma.

   }

   cout<<"}"<<endl;//printing } at the end.

}

Output:-

5

1 2 3 4 5

{1,2,3,4,5}

Explanation:

I have created a function printarr of type void which prints the array elements in one line.I have used for loop to iterate over the array elements.Everything else is mentioned in the comments.

Answer:

The correct option is communication diagram

Explanation:

The communication diagram represents the change of values for an item by a system.

A communication diagram is an expansion of the diagram of objects showing the objects together with the texts traveling from one to another. Besides the connections between objects, the communication diagram demonstrates the messages that the objects send to one another.

The correct option is a) communication diagram

Explanation:

A default constructor is a constructor that present in the class by default with no parameters when we write a new constructor with parameters it is called overloaded constructor.There can be different overloaded constructors in the same class.

The main difference between default constructor and overloaded constructor is that the default constructor does't have any parameters while the overloaded constructors have parameters.

The default constructor takes no arguments and provides standard initialization, while the overloaded constructor has parameters and allows for objects to be initialized with specific values. Both constructors are essential in object-oriented programming for creating and initializing objects.

In object-oriented programming, constructors are special methods used to initialize objects. There are two main types of constructors: the default constructor and the overloaded constructor.

A default constructor is a constructor that takes no arguments. If no constructors are explicitly defined in a class, Java (for example) automatically provides a default constructor, which initializes objects with default values. For instance:

public class Example {
   public Example() {
       // Default constructor
   }
}

An overloaded constructor, on the other hand, has parameters and allows for the creation of objects with specific values. Overloading provides flexibility and the ability to initialize objects in various ways. Here’s an example:

public class Example {
   public Example() {
       // Default constructor
   }
   
   public Example(int value) {
       this.value = value;
       // Overloaded constructor
   }
}

Key Differences

Answer:

// here is code in C.

#include <stdio.h>

// main function

int main(void) {

 // variable

 long long int n;

printf("Enter the value of N:");

 // read the value of n

scanf("%llu",&n);

 // calculate the sum from 1 to N

long long int sum=n*(n+1)/2;

 // print the sum

printf("\nsum of all number from 1 to %llu is: %llu",n,sum);

return 0;

}

Explanation:

Read the value of n from user.Then find the sum of all number from 1 to N with the formula sum of first N natural number.That is (n*(n+1)/2). This will give the sum from 1 to N.

Output:

Enter the value of N:100

sum of all number from 1 to 100 is: 5050

Enter the value of N:1000000

sum of all number from 1 to 1000000 is: 500000500000

Answer:

False

Explanation:

Enterprise Resource Planning (ERP) packages can be complicated. For example: ERP applications such as SAP, Peoplesoft are fairly wide in scope and quite complicated in terms of implementation. Then there are certain desktop versions of ERP which are not so complicated. There are large number of ERP solutions available from different vendors and their complexity is variable but can be quite complex as well.

Answer:

#include <bits/stdc++.h>

using namespace std;

bool isPrime(int n)

{

   for(int j=2;j<=n-1;j++)  //loop to check prime..

   {

       if(n%j==0)

       return false;

   }

   return true;

}

int main(){

   int n;

   cout<<"Enter the integer"<<endl;//taking input..

   cin>>n;

   if(isPrime(n))//printing the message.

   {

       cout<<"The number you have entered is prime"<<endl;

   }

   else

   {

       cout<<"The number is not prime"<<endl;

   }

return 0;

}

Output:-

Enter the integer

13

The number you have entered is prime

Explanation:

The above written program is in C++.I have created a function called isPrime with an argument n.I have used a for loop to check if the number is prime or not.In the main function I have called the function isPrime for checking the number is prime or not.

A Boolean function called isPrime checks whether an integer is a prime number and is implemented in a Python program that prompts the user for a number and displays a corresponding message. The function returns True for prime numbers and False otherwise.

To design a Boolean function called isPrime, which checks whether a given integer is a prime number, you need to ensure that the function meets certain criteria. A prime number is an integer greater than 1 that has no positive divisors other than 1 and itself. The isPrime function should return True if the number is prime and False otherwise. Here is a simple implementation in Python:

To incorporate this function into a program that prompts the user for a number and displays whether it is prime, you could use:

Note that the above program uses a simple loop to check all possible divisors up until the square root of the number, since a larger divisor would necessarily mean a smaller dividend that would have already been checked.

Answer:

Obfuscation

Explanation:

The fact that the analyst can open the Javascript code means that the code is not encrypted. It simply means that the data the analyst is dealing with here is hidden or scrambled to prevent unauthorized access to sensitive data. This technique is known as Data Obfuscation and is a form of encryption that results in confusing data. Obfuscation hides the meaning by rearranging the operations of some software. As a result, this technique forces the attacker to spend more time investigating the code and looking for encrypted parts.

Answer:b) secure_file_priv

Explanation: MYSQL database is the SQL data collection where the command LOAD DATA INFILE is used for the transporting the data-file from the local server to the MYSQL server. This command helps the reading the file's data or text of the client server at rapid speed

The secure_file_priv is the option that is raised from the LOAD DATA INFILE for the limited loading of files from the directories and also makes it secure. Other options are incorrect because they are used for the location and loading.Thus the correct option is option(b).

Answer: Volume()

Explanation: As the class name is mentioned as the Cylinder class() , it can be easily predicted that the dimension of the cylinder is mentioned in the class .The cylinder in general is the round figure that has top and bottom to enclose it. So ,Volume() is the most appropriate function related with cylinder .

Other options are incorrect because radius() function is for the determining of the radius and area() function is for area determination of cylinder ,which are used in the volume calculation .Thus the correct option is Volume() which requires both area and radius for the cylinder.

Answer: Only A, C, and D

Explanation: Object -oriented programming(OOP) is the programming concept that has data types and functions that are applicable on the data structure.The basic features displayed by the OOPs concepts is encapsulation, polymorphism,abstraction,implementation data etc.

OOPs concept does not consider the factors like hiding of data ,modification factor and separating of interface. Thus option A ,C and D are only options that are not focused by OOPs.

Answer: Could be subdivided into smaller and smaller units.

Explanation:

 The continuous data are basically measured in the small units and can be easily subdivided into smaller parts without changing their actual meaning.

The continuous data also contain numeric value and can be divided into smaller and finer meaningful parts.

The continuous data can be measured according to the precision of the system. The size and volume are the example of the continuous data.

Answer: d) All of the above

Explanation: Mail merge is the technique in which the emails are combined with the predefined labels so that it could be mass mailed. This tool is helpful for sending a mail to several people at one time. Data source that is used in the mass mailing is known as the database that holds a column for variables present in templates.

Therefore, outlook contact list, excel sheet access database table,word table etc can be used as the source of data at the time of mail merge.These tools acts as data source to connect with the templates.Data source is the source that contains the information about the recipient such as address etc.

Thus all the options mention in the question are correct.

A possible data for source that could be used when completing a mail merge could be all the above.

d. all the above

Explanation:

Mail merge allows one to send a particular document to different individuals.

It is generally used in office environment where some information is to be communicated  to a number of people. The information is attached by adding the data sources.

The information source is a report, spreadsheet or database that contains customized data, for example, names, locations, and telephone numbers.

Answer:

// here is code in java.

import java.util.*;

// class defintion

class Main

{

// main method of the class

public static void main (String[] args) throws java.lang.Exception

{

   try{

    // scanner object to read input string

       Scanner s=new Scanner(System.in);

        // variables

   double amount;

   int ch;

   double bef_tax, aft_tax;

   System.out.print("Please enter the jackpot amount:");

   // read the amount from user

   amount=s.nextDouble();

   System.out.print("enter Payment choice (1 for cash, 2 for installments): ");

   // read the choice

   ch=s.nextInt();

// if choice is cash then calculate amount before and after the tax

   if(ch==1)

   {

       bef_tax=amount*.65;

       aft_tax=(amount*.70)*.65;

       System.out.println("instantly received amount before tax : "+bef_tax);

       System.out.println("instantly received amount after tax : "+aft_tax);

   }

// if choice is installment then calculate amount before and after the tax

   else if(ch==2)

   {

       bef_tax=amount/20;

       aft_tax=(amount*.70)/20;

       System.out.println("installment amount before tax :  "+bef_tax);

       System.out.println("installment amount after tax : "+aft_tax);

   }

   }catch(Exception ex){

       return;}

}

}

Explanation:

Read the jackpot amount from user.Next read the choice of Payment from user. If user's choice is cash then calculate 65% instantly amount received by user before and after the 30% tax.Print both the amount.Similarly if user's choice is installments then find 20 installments before and after 30% tax.Print the amount before and after the tax.

Output:

Please enter the jackpot amount:200                                                                                                                          

enter Payment choice (1 for cash, 2 for installments): 2                                                                                                      

installment amount before tax :  10.0                                                                                                                        

installment amount after tax : 7.0

Answer:

The number of presentation groups of 3 students that can be selected from a group of 5 students equals 10.

Explanation:

The number of different presenters equals the no of possible combinations of 3 students from a pool of 5 students.

Thus the number of possible combinations equals

[tex]\binom{5}{3}=\frac{5!}{(5-3)!\times 3!}=10[/tex]

Answer:

// here is code in C++.

#include <bits/stdc++.h>

using namespace std;

// function that return the number of vowels in the input string

int count_vowels()

{

// variable

   string str;

   int v_count=0;

   cout<<"enter the string:";

   // read the string

   cin>>str;

   // fuind the length

   int len=str.length();

   // check for vowel

   for(int x=0;x<len;x++)

   {

       char ch=str[x];

       if(ch=='a'||ch=='e'||ch=='i'||ch=='o'||ch=='u'||ch=='A'||ch=='E'||ch=='I'||ch=='O'|ch=='U')

       {

           v_count++;

       }

   }

   // return the count

   return v_count;

}

// driver function

int main() {

// call the function and print the result

cout<<"number of vowels in string is : "<< count_vowels()<<endl;

return 0;

}

Explanation:

In the function count_vowels(), read a sting and then find its length.Then check each character of the string is vowel or not.If it is vowel then Increment the v_count. After the loop return the count to main function and print it.

Output:

enter the string: welcometoprogramming

number of vowels in string is : 7

Answer: Code of ethics

Explanation: Code of ethics in professional field or organizational field is referred as the principles that are responsible for the correct conduct of business organization by governing its functioning and decisions.It is a major key of business field as it maintains right practices,handles issues, provides guidance etc.

Other options are incorrect because business ethics cannot be implemented as principle for the governing the organization working and employees. Common good practice and approach is the basic good conduct and approaching but these factors don't govern the business.

Answer:

// here is code in java.

import java.util.*;

// class definition

class Solution

{

// main method of the class

public static void main (String[] args) throws java.lang.Exception

{

   try{

    // scanner object to read innput

       Scanner s=new Scanner(System.in);

        // variables

       long  min,years,days;

          long  temp;

          System.out.print("Please enter minutes:");

          // read minutes

          min=s.nextLong();

          // make a copy

temp=min;

 // calculate days

days=min/1440;

 // calculate years

years=days/365;

 // calculate remaining days after years

days=days%365;

 // print output

System.out.println(temp+" minutes is equal to "+years+" years and "+days+" days");

   }catch(Exception ex){

       return;}

}

}

Explanation:

Read the number of minutes from user and assign it to variable "minutes" of long long int type.Make a copy of input minutes.Then calculate total days by dividing the input minutes with 1440, because there is 1440 minutes in a day.Then find the year by dividing days with 365.Then find the remaining days and print the output.

 Output:

 please enter the minutes:1000000000

 1000000000 minutes is equal to 1902 years and 214 days.

Answer:

True.

Explanation:

The direction of growth of the stack is downwards it moves from high memory to low memory. Sometimes the growth of stack is in upward direction but it depends on the compiler but mostly the direction of growth is downwards.When the function calls are made they start from high memory address to low memory address.

Answer:

float diameter =7.5;

float PI=3.14159265359 ;

// Calculating circumference and area of the circle

Explanation:

Here we declared two variable diameter and PI of float type  and assigning  the value 7.5,3.14159265359 respectively after that we making a single line comment by using //(forward) slash.

#include<iostream> //header file

using namespace std; // namespace

int main() // main method

{

float diameter =7.5; // Assign the value 7.5 to diameter

float PI=3.14159265359 ;//Assign 3.14159265359 to PI

// Calculating circumference and area of the circle.

return(0);

}

Answer:

float diameter=2*r; //hold the diameter of a circle

float PI; // float variable named PI.

Explanation:

Here we have declared two variable i.e diameter and PI of type float. The variable diameter will hold the diameter of a circle i.e  2*r  where r is the radius of a circle.

Following are the program in c++

#include <iostream> // header file

using namespace std; // namespace

int main() // main function

{

   float r=9.2; // variable declaration

float diameter=2*r; //hold the diameter of a circle

float PI=3.14; // float variable named PI hold 3.14

cout<<"diameter IS :"<<diameter<<endl<<"PI IS :"<<PI; // display value

  return 0;

}

Output:

diameter IS :18.4

PI IS :3.14

Answer:b) Business sections that most extensively use data mining are manufacturing.

Explanation: Data mining is the digging and extraction of the data from the large data sets or databases.The data is analyzed according to various parameters and categories and then extracting process works. It helps in the businesses for making decision ,efficient working, discovery of data etc.

Data mining is usually done by the clients. It extracts the unnecessary information also to remove it and can be combined with spreadsheets.The only incorrect option is option(B) because data mining is mostly used by end users or data mining experts in the business field.

Explanation:

The pointer is the variable that will store the address of the other variable of the same datatype.

Following are the disadvantages of using a pointer.

1. Pointer sometimes causes a segmentation fault in the program.

2. Sometimes pointer leads to a memory leak.

3. A pointer variable is slower than normal variable.

4. Sometimes the program is crash if we using pointer because sufficient memory is not allocated during runtime.

5. If we using pointer it is difficult to find the error in the program.

Answer:

  The javadoc is the type of the tool which accompanies JDK and it is utilized for producing code of the java documentation in the  HTML design from the source code of the java, that basically required documentation in the predefined code format.

Most of the software development company does not use javdoc because the files of the javadoc are light in weight and it can be easily traceable by using the different types of the tools.

In case of the Public javadoc, while make changing in the API system the javadoc an easily be tracked.

Answer: Voice encryption is the end to end encryption/encoding of the the communication taking place through the telephone or mobile devices. The encryptors of voice turn the communication conversation into the digital form which result in stream of bits.

Digital security is the protection and securing of the  devices related with the mobile and online technology. It is important to maintain the security of the information conveyed through the communication. It maintains the protection from the online stealing of the data and fraud.

Voice encryption is essential for protecting communications over the internet by converting voice data into an encrypted, indecipherable form. It ensures that only individuals with the proper decryption keys can access the information, thereby maintaining its confidentiality and integrity, while also safeguarding against interception and tampering. Establishing secure key exchange is crucial for privacy on insecure channels.

Voice encryption is a crucial digital security measure that serves to protect sensitive information communicated over voice channels. In the digital world, information can be easily intercepted, modified, or stolen. Encryption acts as a barrier that only allows access to information for those who have the correct key. The process involves converting the voice data into a scrambled form that is nearly impossible to understand without the proper decryption key. This is vital for maintaining the confidentiality, integrity, and authenticity of the communication.

Protection of encryption keys is fundamental to the security of encrypted data. Modern cryptographic protocols rely on the secrecy of keys, as most encryption methods themselves are publicly known. Applications like Signal protect users by keeping encryption keys secure on their own devices. For secure online communication and end-to-end encryption, it is essential to have a system for verifying encryption keys to establish trustworthiness, and to prevent Man in the Middle attacks, where a malicious entity intercepts and potentially alters the messages.

Authentication plays a significant role in ensuring that communication comes from a genuine source, especially online where impersonation is easier. Digital encryption also helps protect certain metadata from eavesdroppers, though not all types of metadata can be shielded. Without encryption, all voice and digital communication would risk exposure to unwanted parties, like hackers or government agencies. Hence, establishing a secure method to exchange encryption keys is vital for privacy over insecure channels, like the internet.

Answer: Internet filter

Explanation:

Internet filters are referred to as software which prevents individuals from accessing certain kind of websites. These filters are predominantly used in order to block content that might be considered inappropriate for some users. These filters are widely used in public library and computers used by schools and colleges.

Answer: Page link

Explanation:

 Page link is the type of the technology that usually found in the website and it used to link the web pages with the databases. The page link basically contain the list of the web page link of the organization.

Then, the linked page of the data is basically the web page which describe the various hyper data links.

The page link basically used linking the one post to another easily and it automatically linked the various business activity with the business partner.  

The correct answer is Dynamic page.

Dynamic pages link web pages with databases, allowing user interaction and automatic updates to content. This technology supports complex business applications and enhances user experience.
In modern web development, technologies like PhP, Javascript, and database connector strings are used to create dynamic pages that link web pages with databases. These pages allow users to interact with the website, and the content on the page can change based on user input, automating much of business activity with business partners.

For example, when a user submits a form on a dynamic web page, the data can be immediately stored in a database, making it easier to manage and retrieve information. This approach enhances both functionality and user experience, as well as supports complex business applications.
The correct answer is Dynamic page.

Answer: Straight-through cable.

Explanation: Straight-through cable are the cables that are used for connecting the host and client.It is the type of twisted-pair cable wire which forms the connection the local area network(LAN).This copper wire sis used for the connection of the client devices like printer etc top the hub.

The connection formed through the straight -through cable is made with the RJ-45 connectors having similar conductor(pin) arrangement .Thus, connection of two host back to back is done by straight-through cables.

Final answer:

To connect two hosts directly with a twisted pair cable, a crossover cable is needed, which has the transmit and receive pairs crossed over to enable direct device-to-device communication. While modern network interfaces may auto-sense and negate the need for crossover cables, they remain important for use with older or non-auto-sensing devices.

Explanation:

To connect two hosts directly using a twisted pair cable in a back-to-back configuration, you would use a crossover cable. This type of cable is designed to connect two network devices of the same type, such as two computers, without the need for a switch or hub in between. The crossover cable crosses over the transmit and receive pairs, allowing the devices to communicate directly. Twisted pair cables, such as Cat5e or Cat6, are commonly used for this purpose, with the wiring specifically configured within the RJ45 connectors to enable this direct communication.

For example, in a standard Ethernet cable which is a straight-through cable, the wires are connected identically on both ends. However, for a crossover cable, one end of the cable has the green pair of wires switched with the orange pair, meaning pin 1 becomes pin 3 and pin 2 becomes pin 6 on the other end. This switch allows the transmit (TX) pins on one end to match up to the receive (RX) pins on the other, enabling two network devices to communicate.

Using a crossover cable is less common nowadays with modern network interfaces often including auto-sensing technology that can automatically adjust to communicate over straight-through cables. However, it's still important for compatibility with older equipment or situations where auto-sensing isn't available.

Answer: (A) Client/server networks can easily scale, which might require the purchase of additional client licences.

Explanation:

The client server model are easily scalable as it makes the system more efficient and has high ability to make the program for scale.

The Client /server local area networks (LANs) offer improved security for shared assets, more easily execution, expanded reinforcement effectiveness for system based information, and the potential for the utilization of excess power supplies and RAID drive exhibits.

A server is intended to share its assets among the customer PCs on the system. Commonly, servers are situated in verified zones, for example, bolted storage rooms or server farms (server rooms), since they hold an association's most profitable information and don't need to be gotten to by administrators consistently.