Threads Fork Exec MCQs

9 MCQs — Operating System MCQs

Practice Threads Fork Exec MCQs with correct answers and explanations. These questions are from the Operating System MCQs section.

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Threads Fork Exec	Threads Pools
Threads Signal Handling	Threads Ult Klt
Two Port Network	Virtual Memory
Virtual Memory Demand Paging	Virtual Memory Frame Allocation
Virtual Memory Page Replacement Algorithms 1	Virtual Memory Page Replacement Algorithms 2
Virtual Memory Thrashing

Which of the following system calls does not return control to the calling point, on termination?

A. Fork
B. Exec
C. Ioctl
D. Longjmp

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The following program results in the creation of? main() { if(fork()>0) sleep(100); }

A. An orphan process
B. A zombie process
C. A process that executes forever
D. None of the mentioned

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Which of the following system calls transforms executable binary file into a process?

A. Fork
B. Exec
C. Ioctl
D. Longjmp

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How many times the following C program prints yes? main() { fork();fork();printf(""yes""); }

A. Only once
B. Twice
C. Four times
D. Eight times

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Which of the following calls never returns an error?

A. Getpid
B. Fork
C. Ioctl
D. Open

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A fork system call will fail if ______________

A. The previously executed statement is also a fork call
B. The limit on the maximum number of processes in the system would be executed
C. The limit on the minimum number of processes that can be under execution by a single user would be executed
D. All of the mentioned

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If a thread invokes the exec system call ____________

A. Only the exec executes as a separate process
B. The program specified in the parameter to exec will replace the entire process
C. The exec is ignored as it is invoked by a thread
D. None of the mentioned

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If exec is called immediately after forking ____________

A. The program specified in the parameter to exec will replace the entire process
B. All the threads will be duplicated
C. All the threads may be duplicated
D. None of the mentioned

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If a process does not call exec after forking ____________

A. The program specified in the parameter to exec will replace the entire process
B. All the threads should be duplicated
C. All the threads should not be duplicated
D. None of the mentioned

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