Operating System Practice Test 1

Question 1 of 20

1. In operating system, each process has its own __________

all of the mentioned

open files

pending alarms, signals and signal handlers

address space and global variables

Question 1 of 20

Question 2 of 20

2. In indirect communication between processes P and Q __________

there is another machine between the two processes to help communication

there is another process R to handle and pass on the messages between P and Q

there is a mailbox to help communication between P and Q

none of the mentioned

Question 2 of 20

Question 3 of 20

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

Translation lookaside buffer

General purpose registers

Program counter

All of the mentioned

Question 3 of 20

Question 4 of 20

4. A process can be terminated due to __________

all of the mentioned

normal exit

killed by another process

fatal error

Question 4 of 20

Question 5 of 20

5. A monitor is a module that encapsulates __________

shared data structures

all of the mentioned

synchronization between concurrent procedure invocation

procedures that operate on shared data structure

Question 5 of 20

Question 6 of 20

6. The OS X has ____________

monolithic kernel

hybrid kernel

microkernel

monolithic kernel with modules

Question 6 of 20

Question 7 of 20

7. In UNIX, each process is identified by its __________

None of the mentioned

Process Control Block

Process Identifier

Device Queue

Question 7 of 20

Question 8 of 20

8. What is the main function of the command interpreter?

to provide the interface between the API and application program

to handle the files in operating system

to get and execute the next user-specified command

none of the mentioned

Question 8 of 20

Question 9 of 20

9. The address of the next instruction to be executed by the current process is provided by the __________

Program counter

CPU registers

Pipe

Process stack

Question 9 of 20

Question 10 of 20

10. Which module gives control of the CPU to the process selected by the short-term scheduler?

interrupt

scheduler

none of the mentioned

dispatcher

Question 10 of 20

Question 11 of 20

11. If a process fails, most operating system write the error information to a ______

another running process

new file

log file

none of the mentioned

Question 11 of 20

Question 12 of 20

12. Which one of the following is a synchronization tool?

socket

thread

semaphore

pipe

Question 12 of 20

Question 13 of 20

13. The only state transition that is initiated by the user process itself is __________

wakeup

block

dispatch

none of the mentioned

Question 13 of 20

Question 14 of 20

14. What is a long-term scheduler?

It selects processes which have to be executed next and allocates CPU

It selects processes which heave to remove from memory by swapping

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

None of the mentioned

Question 14 of 20

Question 15 of 20

15. Which algorithm is defined in Time quantum?

priority scheduling algorithm

round robin scheduling algorithm

multilevel queue scheduling algorithm

shortest job scheduling algorithm

Question 15 of 20

Question 16 of 20

16. Restricting the child process to a subset of the parent’s resources prevents any process from __________

overloading the system by creating a lot of sub-processes

crashing the system by utilizing multiple resources

under-loading the system by very less CPU utilization

overloading the system by using a lot of secondary storage

Question 16 of 20

Question 17 of 20

17. What is Interprocess communication?

allows processes to communicate and synchronize their actions

allows processes to communicate and synchronize their actions when using the same address space

none of the mentioned

allows the processes to only synchronize their actions without communication

Question 17 of 20

Question 18 of 20

18. The state of a process is defined by __________

the activity just executed by the process

the activity to next be executed by the process

the final activity of the process

the current activity of the process

Question 18 of 20

Question 19 of 20

19. Which one of the following can not be scheduled by the kernel?

none of the mentioned

user level thread

kernel level thread

process

Question 19 of 20

Question 20 of 20

20. The Zero Capacity queue __________

is referred to as a link

is referred to as a message system with buffering

none of the mentioned

is referred to as a message system with no buffering

Question 20 of 20

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