message queues,shared memory,semaphore IPC

Which system call is used to create Sys V message Queue ?

• msgctl

• semget

• shemget

• msgget

Which is not the correct option for removing a message queue ?

• ipcrm -m

• ipcrm -Q

• ipcrm -q

• None of the above

Message queues are created in

• kernelspace

• userspace

• All of the above

• None of the above

Command used to check shared memory is

• ipcs -q

• ipcs -s

• ipcs -m

• ipcs

Which is Fastest IPC ?

• shared memory

• Message Queue

• Socket

• All of the above

What is the persistancy level of Shared memory segments ?

• kernel

• file system

• process

• signal

The structure which keeps the information about shared memory in the kernel is

• struct msgid_ds

• struct ipc_perm

• struct semid_ds

• struct shmid_ds

One process requires M resource to complete a job. What should be the minimum number of resources available for N processes so that at least one process can continue to execute without blocking/waiting ?

• M

• M * N + 1

• M * N - 1

• M * N

Semaphore P( ) operation usually does the following

• wakes up a sleeping process

• decrements the semaphore count and the process sleeps if needed

• increments the semaphore count

• None of the above

Which call to use to set the resource count of semaphore ?

• sem_setcount( )

• semget( )

• semctl( )

• sem_set_count( )