Operating System Set 10 MCQs

Q1 | A single thread of control allows the process to perform

only one task at a time

multiple tasks at a time

only two tasks at a time

all of the mentioned

Q2 | What is the objective of multiprogramming?

have a process running at all time

have multiple programs waiting in a queue ready to run

to increase cpu utilization

none of the mentioned

Q3 | Which of the following do not belong to queues for processes?

job queue

pcb queue

device queue

ready queue

Q4 | When the process issues an I/O request

it is placed in an i/o queue

it is placed in a waiting queue

it is placed in the ready queue

it is placed in the job queue

Q5 | What will happen when a process terminates?

it is removed from all queues

it is removed from all, but the job queue

its process control block is de-allocated

its process control block is never de- allocated

Q6 | What is a long-term scheduler?

it selects processes which have to be brought into the ready queue

it selects processes which have to be executed next and allocates cpu

it selects processes which heave to remove from memory by swapping

none of the mentioned

Q7 | If all processes I/O bound, the ready queue will almost always be and the Short term Scheduler will have a to do.

full, little

full, lot

empty, little

empty, lot

Q8 | What is a medium-term scheduler?

it selects which process has to be brought into the ready queue

it selects which process has to be executed next and allocates cpu

it selects which process to remove from memory by swapping

none of the mentioned

Q9 | What is a short-term scheduler?

it selects which process has to be brought into the ready queue

it selects which process has to be executed next and allocates cpu

it selects which process to remove from memory by swapping

none of the mentioned

Q10 | The primary distinction between the short term scheduler and the long term scheduler is

the length of their queues

the type of processes they schedule

the frequency of their execution

none of the mentioned

Q11 | In a multiprogramming environment

the processor executes more than one process at a time

the programs are developed by more than one person

more than one process resides in the memory

a single user can execute many programs at the same time

Q12 | The context of a process in the PCB of a process does not contain

the value of the cpu registers

the process state

memory-management information

context switch time

Q13 | Which of the following need not necessarily be saved on a context switch between processes?

general purpose registers

translation lookaside buffer

program counter

all of the mentioned

Q14 | Which of the following does not interrupt a running process?

a device

timer

scheduler process

power failure

Q15 | Which process can be affected by other processes executing in the system?

cooperating process

child process

parent process

init process

Q16 | When several processes access the same data concurrently and the outcome of the execution depends on the particular order in which the access takes place, is called?

dynamic condition

race condition

essential condition

critical condition

Q17 | If a process is executing in its critical section, then no other processes can be executing in their critical section. This condition is called?

mutual exclusion

critical exclusion

synchronous exclusion

asynchronous exclusion

Q18 | Which one of the following is a synchronization tool?

thread

pipe

semaphore

socket

Q19 | A semaphore is a shared integer variable

that can not drop below zero

that can not be more than zero

that can not drop below one

that can not be more than one

Q20 | Mutual exclusion can be provided by the

mutex locks

binary semaphores

both mutex locks and binary semaphores

none of the mentioned

Q21 | When high priority task is indirectly preempted by medium priority task effectively inverting the relative priority of the two tasks, the scenario is called

priority inversion

priority removal

priority exchange

priority modification

Q22 | Process synchronization can be done on

hardware level

software level

both hardware and software level

none of the mentioned

Q23 | A monitor is a module that encapsulates

shared data structures

procedures that operate on shared data structure

synchronization between concurrent procedure invocation

all of the mentioned

Q24 | To enable a process to wait within the monitor

a condition variable must be declared as condition

condition variables must be used as boolean objects

semaphore must be used

all of the mentioned

Q25 | Restricting the child process to a subset of the parent’s resources prevents any process from

overloading the system by using a lot of secondary storage

under-loading the system by very less cpu utilization

overloading the system by creating a lot of sub-processes

crashing the system by utilizing multiple resources