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alina1380 [7]
3 years ago
9

Windows OS and Mac OS are examples of which type of operating system?

Computers and Technology
2 answers:
NeX [460]3 years ago
7 0
Unix I believe is what you're looking for.
german3 years ago
5 0
Windows OS and Mac OS are examples of single user, multi tasking Operating Systems.
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What is a motherboard?
laila [671]

Answer:

A mother board is something that helps a electronic run im guessing

Explanation:

6 0
3 years ago
Read 2 more answers
Using the program below, explain what the output will be at LINE A. 1 #include 2#include 3#include 4 5 int value - 128; 6 7 int
slega [8]

Answer:

This is the complete correct program:

#include <stdio.h>

#include<sys/types.h>

#include<unistd.h>

int value = 128;

int main()

{

  pid_t pid;

  pid=fork();

  if (pid==0) /* child process */

  {

  value +=8;

  return 0; }

  else if (pid > 0) {/* parent process */

 wait (NULL);

 printf ("PARENT: value =%d\n" ,value); /* LINEA */

 return 0;

}

}

The output of the LINE A is:

PARENT: value = 128

Explanation:

The fork() function used in the program creates a new process and this process is the child process. The child process is same as the original process having its own address space or memory.

In the child process the value of pid is 0. So the if condition checks if pid==0. Then the child process adds 8 to the value of its variable according to the following statement  

value +=8;

Now the original process has value = 128. In else if part the parents process has the value of pid greater than zero and this portion of the program is of the parent process :

else if (pid > 0)

{ wait (NULL);

printf ("PARENT: value =%d\n" ,value);

return 0; }

So the value 128 is printed at the end in the output.

wait(NULL) is used to wait for the child process to terminate so the parent process waits untill child process completes.

So the conclusion is that even if the value of the variable pid is changed in the child process but it will not affect the value in the variable of the parent process.

5 0
3 years ago
The following SQL statement contains which type of subquery? SELECT title FROM books WHERE EXISTS (SELECT isbn FROM orderitems W
Rudiy27

Answer:

(a) Correlated.

Explanation:

Correlated subquery :These sub queries reference columns from outer table or uses values from outer query.These sub queries are processed atleast once for every row processed.So because of this reason correlated sub queries can be slow.Since the query in the question also uses value from the outer query so it is a correlated query.

4 0
3 years ago
In c please
Paraphin [41]

Answer:

#include <stdio.h>

#include <ctype.h>

void printHistogram(int counters[]) {

   int largest = 0;

   int row,i;

   for (i = 0; i < 26; i++) {

       if (counters[i] > largest) {

           largest = counters[i];

       }

   }

   for (row = largest; row > 0; row--) {

       for (i = 0; i < 26; i++) {

           if (counters[i] >= row) {

               putchar(254);

           }

           else {

               putchar(32);

           }

           putchar(32);

       }

       putchar('\n');

   }

   for (i = 0; i < 26; i++) {

       putchar('a' + i);

       putchar(32);

   }

}

int main() {

   int counters[26] = { 0 };

   int i;

   char c;

   FILE* f;

   fopen_s(&f, "story.txt", "r");

   while (!feof(f)) {

       c = tolower(fgetc(f));

       if (c >= 'a' && c <= 'z') {

           counters[c-'a']++;

       }

   }

   for (i = 0; i < 26; i++) {

       printf("%c was used %d times.\n", 'a'+i, counters[i]);

   }

   printf("\nHere is a histogram:\n");

   printHistogram(counters);

}

5 0
3 years ago
3. Write a method squareOfAsterisks that displays a solid square (the same number of rows and columns) of asterisks whose side i
iren2701 [21]

Answer:

Following are the program to this question:

#include <iostream>//defining header file

using namespace std;

void squareOfAsterisks(int x) //defining method squareOfAsterisks

{

   int i,j; //defining integer variable

   for(i=1;i<=x;i++) //defining loop to print column value

   {

   for(j=1;j<=x;j++) //defining loop to print row value

   {

   cout<<"*"; //print value

   }

   cout<<endl; //for line break

   }

}

int main() //defining main method

{

int x; //defining integer variable

cout<<"Enter any number: "; //print message

cin>>x; //input value from user

squareOfAsterisks(x); //calling the method and pass the value

return 0;

}

Output:

Enter any number: 4

****

****

****

****

Explanation:

The description of the above program can be given as follows:

  • In the given program a method "squareOfAsterisks" is declared, that accepts an integer value "x" in its arguments, inside the method two integer variable I, j is used, that uses a to print the given pattern.
  • In the main method, an integer variable x is declared, which takes input from the user end, and then calls the method, that is "squareOfAsterisks" and passes its value.
8 0
3 years ago
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