Deck 10: Process Scheduling and Synchronization in Multi-Programming Environment

Question 1

A single thread of control allows the process to perform___________      

A)only one task at a time
B)multiple tasks at a time
C)only two tasks at a time
D)all of the mentioned

Answer 1

only one task at a time

Question 2

What is the objective of multiprogramming?

A)have a process running at all time
B)have multiple programs waiting in a queue ready to run
C)to increase cpu utilization
D)none of the mentioned

Answer 2

to increase cpu utilization

Question 3

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

A)job queue
B)pcb queue
C)device queue
D)ready queue

Answer 3

pcb queue

Question 4

When the process issues an I/O request

A)it is placed in an i/o queue
B)it is placed in a waiting queue
C)it is placed in the ready queue
D)it is placed in the job queue

Question 5

What will happen when a process terminates?

A)it is removed from all queues
B)it is removed from all, but the job queue
C)its process control block is de-allocated
D)its process control block is never de- allocated

Question 6

What is a long-term scheduler?

A)it selects processes which have to be brought into the ready queue
B)it selects processes which have to be executed next and allocates cpu
C)it selects processes which heave to remove from memory by swapping
D)none of the mentioned

Question 7

If all processes I/O bound, the ready queue will almost always be___________  and the Short term Scheduler will have a___________  to do.

A)full, little
B)full, lot
C)empty, little
D)empty, lot

Question 8

What is a medium-term scheduler?

A)it selects which process has to be brought into the ready queue
B)it selects which process has to be executed next and allocates cpu
C)it selects which process to remove from memory by swapping
D)none of the mentioned

Question 9

What is a short-term scheduler?___________      

A)it selects which process has to be brought into the ready queue
B)it selects which process has to be executed next and allocates cpu
C)it selects which process to remove from memory by swapping
D)none of the mentioned

Question 10

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

A)the length of their queues
B)the type of processes they schedule
C)the frequency of their execution
D)none of the mentioned

Question 11

In a multiprogramming environment

A)the processor executes more than one process at a time
B)the programs are developed by more than one person
C)more than one process resides in the memory
D)a single user can execute many programs at the same time

Question 12

The context of a process in the PCB of a process does not contain___________      

A)the value of the cpu registers
B)the process state
C)memory-management information
D)context switch time

Question 13

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

A)general purpose registers
B)translation lookaside buffer
C)program counter
D)all of the mentioned

Question 14

Which of the following does not interrupt a running process?

A)a device
B)timer
C)scheduler process
D)power failure

Question 15

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

A)cooperating process
B)child process
C)parent process
D)init process

Question 16

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?

A)dynamic condition
B)race condition
C)essential condition
D)critical condition

Question 17

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

A)mutual exclusion
B)critical exclusion
C)synchronous exclusion
D)asynchronous exclusion

Question 18

Which one of the following is a synchronization tool?

A)thread
B)pipe
C)semaphore
D)socket

Question 19

A semaphore is a shared integer variable

A)that can not drop below zero
B)that can not be more than zero
C)that can not drop below one
D)that can not be more than one

Question 20

Mutual exclusion can be provided by the

A)mutex locks
B)binary semaphores
C)both mutex locks and binary semaphores
D)none of the mentioned

Question 21

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

A)priority inversion
B)priority removal
C)priority exchange
D)priority modification

Question 22

Process synchronization can be done on

A)hardware level
B)software level
C)both hardware and software level
D)none of the mentioned

Question 23

A monitor is a module that encapsulates

A)shared data structures
B)procedures that operate on shared data structure
C)synchronization between concurrent procedure invocation
D)all of the mentioned

Question 24

To enable a process to wait within the monitor___________      

A)a condition variable must be declared as condition
B)condition variables must be used as boolean objects
C)semaphore must be used
D)all of the mentioned

Question 25

Restricting the child process to a subset of the parent's resources prevents any process from___________      

A)overloading the system by using a lot of secondary storage
B)under-loading the system by very less cpu utilization
C)overloading the system by creating a lot of sub-processes
D)crashing the system by utilizing multiple resources