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Recent questions tagged fork-system-call

0 votes

2 answers

31

Operating System
On Solving manually I too getting 14 as answer. but on running more than 14 * are printed.

Overflow04 asked in Operating System Aug 29, 2022

860 views

0 votes

1 answer

32

justify the answer
how many child process will be created for the following code.how many hello and welcome will be printed #include <stdio.h> void main() { fork(); fork(); printf("Hello \n"); fork(); printf("welcome\n"); }

emlin asked in Operating System Jun 26, 2022

by emlin

3.6k views

1 vote

2 answers

33

Geeksforgeeks mock - 2022
Consider the following C program: #include <stdio.h> #include <stdlib.h> #include <unistd.h> int main (void) { pid_t pid; int x = 2; pid = fork ( ); if (pid = = 0); x = 8; fork( ); printf("%d", x); return 0; } Fork ( ) is a system call creates new ... the program is executed on the unix OS?[MSQ] (a) 8 2 2 8 (b) 8 8 2 2 (c) 2 8 8 2 (d) 2 2 8 8

o asked in Operating System Dec 19, 2021

by o

1.4k views

5 votes

8 answers

34

Andrew S. Tanenbaum (OS) Edition 4 Exercise 2 Question 39 (Page No. 177)
Consider the following piece of C code: void main( ) { fork( ); fork( ); exit( ); } How many child processes are created upon execution of this program?

admin asked in Operating System Oct 25, 2019

by admin

3.4k views

13 votes

4 answers

35

fork() using Tree structure
How many times ‘4’ will be printed ? int main() { if (fork() && (!fork())) { if (fork() || fork()) { fork(); } } printf("4 "); return 0; } How to approach these kind of questions using Tree structure ??

Brij gopal Dixit asked in Operating System Jun 13, 2019

by Brij gopal Dixit

8.8k views

2 votes

2 answers

36

Virtual Gate Test Series: Operating System - Fork-Join Concurrency Structure
Consider the code fragment: count = 3; S1; Fork L1; L1: S3; S2; goto L3; S4; Fork L2; L2: S6; goto L3; S5; L3: join count S7 Which one of the following represents correct precedence graph of the above code fragment? the answer is given but I’m getting where am I wrong?

aditi19 asked in Operating System Jun 12, 2019

3.9k views

1 vote

1 answer

37

Galvin Edition 9 Exercise 3 Question 1 (Page No. 149)
#include <sys/types.h> #include <stdio.h> #include <unistd.h> int value = 5; int main() { pid t pid; pid = fork(); if (pid == 0) { /* child process */ value += 15; return 0; } else if (pid > 0) { /* ... ;PARENT: value = %d",value); /* LINE A */ return 0; } } Explain what the output will be at LINE A in this program.

akash.dinkar12 asked in Operating System Mar 19, 2019

by akash.dinkar12

937 views

9 votes

4 answers

38

Fork (ACE)
main() { if(fork()>=0) { printf("*"); if(fork()==0) { printf("*"); } else{ //do nothing } printf("*"); } How many number of times “*” will be printed?

srestha asked in Operating System Feb 27, 2019

3.3k views

24 votes

8 answers

39

GATE CSE 2019 | Question: 17
The following C program is executed on a Unix/Linux system : #include<unistd.h> int main() { int i; for(i=0; i<10; i++) if(i%2 == 0) fork(); return 0; } The total number of child processes created is ________________ .

Arjun asked in Operating System Feb 7, 2019

by Arjun

17.2k views

3 votes

1 answer

40

Ace Test Series: Operating System - Fork()

Na462 asked in Operating System Feb 2, 2019

by Na462

2.2k views

1 vote

2 answers

41

Applied Course | Mock GATE | Test 1 | Question: 48
Assume the following program is compiled and run on a modern Linux machine: main() { int x = 0; int a = fork(); x++; if (a == 0) { a = fork(); x++; } else { x++; } printf("GATE!\n"); printf("x is %d ... $"x"$ may have different values on different runs of the program. $2$ $3$ $5$

Applied Course asked in Operating System Jan 16, 2019

by Applied Course

863 views

1 vote

1 answer

42

fork and exec
what is the output of the following program? int ret = fork(); if(ret == 0) { exec(some_binary); // this call fails printf("child "); }else { wait(); printf("parent\n"); } Runtime Error child parent child parent

dd asked in Operating System Jan 13, 2019

by dd

822 views

0 votes

1 answer

43

UPPCL AE 2018:36
Consider the following program. #include<stdio.h> #include<stdlib.h> #include<unistd.h> int main(void) { pid_t pid; int varl = 100; pid = fork(); if(pid == 0) /* Child process */ varl = 200; fork(); printf( %d , varl); return 0; } Assuming all invocations of fork are ... $200 \; 200 \; 200 \; 200$ $100 \; 100 \; 100 \; 100$ $100 \; 200 \; 200 \; 200$

admin asked in Operating System Jan 5, 2019

by admin

381 views

1 vote

2 answers

44

OS FORK---OUTPUT
int main(void) { int var1=100; int pid; if(pid==fork()) var1=200; fork(); printf("%d",var1); return 0; } what could be the output ? a)100 100 200 200 b)200 200 200 200 c)none

junaid ahmad asked in Operating System Jan 1, 2019

by junaid ahmad

1.5k views

7 votes

2 answers

45

GATE Overflow | Mock GATE | Test 1 | Question: 12
Consider a parent process $P$ that has forked a child process $C$. $C$ has again forked another child process $D$. Now $P$ terminates while $C$ and $D$ are still running. In this case, which of the following statements ... process, until adopted by the parent process of $P$ $P$ immediately becomes an orphan process, until adopted by its parent

Ruturaj Mohanty asked in Operating System Dec 27, 2018

by Ruturaj Mohanty

3.4k views

0 votes

0 answers

46

self doubt fork
ans is 20. pls explain procedure. thanx in advance

Shubham Aggarwal asked in Operating System Dec 7, 2018

by Shubham Aggarwal

406 views

0 votes

2 answers

47

Operating System: Fork
A process executes the following segment of code: int main() { fork(); fork() && fork(); } The number of new processes created is __________ Can someone pls explain me the solution

Pavan Shetty asked in Operating System Nov 24, 2018

by Pavan Shetty

1.8k views

1 vote

2 answers

48

Self doubt -OS-FORK()

Warrior asked in Operating System Nov 10, 2018

1.3k views

3 votes

2 answers

49

#OS Fork () tell the O/P?
A process executes the following segment of code : for(i = 1; i <= n; i++) fork (); fork (); The number of new processes created is

iarnav asked in Operating System Oct 18, 2018

by iarnav

1.9k views

1 vote

1 answer

50

#OS Fork () tell the output?
void forkexample() { // child process because return value zero if (fork() == 0) printf("Hello from Child!\n"); // parent process because return value non-zero. else printf("Hello from Parent!\n"); } int main() { forkexample(); return 0; } Please someone explain how things are working?

iarnav asked in Operating System Oct 17, 2018

by iarnav

808 views

1 vote

2 answers

51

made esay systeam call

amit166 asked in Operating System Oct 12, 2018

598 views

0 votes

0 answers

52

Self Doubt on Fork with logical OR
if (e1 || e2 ) { print "OK" } print "HAI" if e1 is true, with out checking e2 ===> it directly prints OK then HAI let take, it is fork in the place of e1 ===> 1) parent ( which have > 0 ) ===> e1 is true, ===> OK HAI printed 2) child ( which have = 0 ) ==> e1 false, ==> check e2. is it right or wrong?

Shaik Masthan asked in Programming in C Sep 16, 2018

by Shaik Masthan

1.1k views

0 votes

2 answers

53

Fork system call,open file table
The fork system call creates new entries in the open file table for the newly created child process. [True / False] [ what is open file table ? ]

dd asked in Operating System Sep 15, 2018

by dd

1.0k views

4 votes

1 answer

54

RBRTestSeries
The value of z after the execution of the following program is void f(int x) { static int z; z=z+x; } int main() { int y=10; fork(); fork(); f(y); return 0; } Options are: a. 40 b. 30 c. 20 d. 10

sumedha bhatia asked in Operating System Sep 5, 2018

by sumedha bhatia

1.5k views

9 votes

2 answers

55

Fork System Call
A process execute the code: main() { fork(); fork() && fork() || fork(); fork(); printf("Hi"); } The number of times "Hi" will be printed is

nandini gupta asked in Operating System Aug 12, 2018

by nandini gupta

4.7k views

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Recent questions tagged fork-system-call