Operating System Mcqs

Page No. 59

If exec is called immediately after forking ____________


athe program specified in the parameter to exec will replace the entire process

✓


ball the threads will be duplicated

✖


call the threads may be duplicated

✖


dnone of the mentioned

✖



If a thread invokes the exec system call ____________


aonly the exec executes as a separate process

✖


bthe program specified in the parameter to exec will replace the entire process

✓


cthe exec is ignored as it is invoked by a thread

✖


dnone of the mentioned View Answer

✖



A fork system call will fail if ______________


athe previously executed statement is also a fork call

✖


bthe limit on the maximum number of processes in the system would be executed

✓


cthe limit on the minimum number of processes that can be under execution by a single user would be executed

✖


dall of the mentioned

✖



Which of the following calls never returns an error?


agetpid

✓


bfork

✖


cioctl

✖


dopen

✖


View Answer getpid

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


afork

✖


bexec

✓


cioctl

✖


dlongjmp

✖


View Answer exec

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


afork

✖


bexec

✓


cioctl

✖


dlongjmp

✖


View Answer exec

If multiple threads are concurrently searching through a database and one thread returns the result then the remaining threads must be ____________


acontinued

✖


bcancelled

✓


cprotected

✖


dnone of the mentioned

✖


View Answer cancelled

Cancellation point is the point where ____________


athe thread can be cancelled – safely or otherwise doesn’t matter

✖


bthe thread can be cancelled safely

✓


cthe whole process can be cancelled safely

✖


dnone of the mentioned

✖



Cancelling a thread asynchronously ____________


afrees all the resources properly

✖


bmay not free each resource

✓


cspoils the process execution

✖


dnone of the mentioned

✖



When the target thread periodically checks if it should terminate and terminates itself in an orderly manner, it is called?


aAsynchronous cancellation

✖


bSystematic cancellation

✖


cSudden Termination

✖


dDeferred cancellation

✓


View Answer Deferred cancellation

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