Module 1 - Questions on Processes

Question 1

What is operating system?

Accepted Answer

all of the above

Answer

collection of programs that manages hardware resources

Answer

system service provider to the application programs

Answer

link to interface the hardware and application programs

Question 2

To access the services of operating system, the interface is provided by the

Accepted Answer

System calls

Answer

API

Answer

Library

Answer

Assembly instructions

Question 3

Which one of the following is not true?

Accepted Answer

kernel is made of various modules which can not be loaded in running operating system

Answer

kernel is the program that constitutes the central core of the operating system

Answer

kernel is the first part of operating system to load into memory during booting

Answer

kernel remains in the memory during the entire computer session

Question 4

Which one of the following errors will be handle by the operating system?

Accepted Answer

all of the above

Answer

power failure

Answer

lack of paper in printer

Answer

connection failure in the network

Question 5

The main function of the command interpreter is

Accepted Answer

to get and execute the next user-specified command

Answer

to provide the interface between the API and application program

Answer

to handle the files in operating system

Answer

none of the above

Question 6

In an operating system, resource management can be done via

Accepted Answer

both time and space division multiplexing

Answer

time division multiplexing

Answer

space division multiplexing

Answer

none of the mentioned

Question 7

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

Accepted Answer

log file

Answer

another running process

Answer

new file

Answer

none of the above

Question 8

Which facility dynamically adds probes to a running system, both in user processes and in the kernel?

Accepted Answer

DTrace

Answer

DLocate

Answer

DMap

Answer

DAdd

Question 9

Which one of the following is not a real time operating system?

Accepted Answer

Palm OS

Answer

VxWorks

Answer

Windows CE

Answer

RTLinux

Question 10

The OS X has ____________

Accepted Answer

hybrid kernel

Answer

monolithic kernel

Answer

microkernel

Answer

monolithic kernel with modules

Question 11

The systems which allows only one process execution at a time, are called

Accepted Answer

uniprocessing systems

Answer

uniprogramming systems

Answer

unitasking systems

Answer

none of the above

Question 12

In an operating system, each process has its own

Accepted Answer

all of the above

Answer

address space and global variables

Answer

open files

Answer

pending alarms, signals and signal handlers

Question 13

In Unix, Which system call creates the new process?

Accepted Answer

fork ()

Answer

create ()

Answer

new ()

Answer

none of the above

Question 14

A process can be terminated due to

Accepted Answer

all of the above

Answer

a normal exit

Answer

a fatal error

Answer

being killed by another process

Question 15

What is the ready state of a process?

Accepted Answer

when process is scheduled to run after some execution

Answer

when process is unable to run until some task has been completed

Answer

when process is using the CPU

Answer

none of the above

Question 16

What is interprocess communication?

Accepted Answer

communication between two process

Answer

communication within the process

Answer

communication between two threads of same process

Answer

none of the above

Question 17

A set of processes is deadlocked if

Accepted Answer

each process is blocked and will remain so forever

Answer

each process is terminated

Answer

all processes are trying to kill each other

Answer

none of the above

Question 18

A process stack does not contain

Accepted Answer

PID of child process

Answer

Function parameters

Answer

Local variables

Answer

Return addresses

Question 19

Which system call returns the process identifier of a terminated child?

Accepted Answer

wait

Answer

exit

Answer

fork

Answer

get

Question 20

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

Accepted Answer

Program counter

Answer

CPU registers

Answer

Process stack

Answer

Pipe

Question 21

A Process Control Block(PCB) does not contain which of the following :

Accepted Answer

Bootstrap program

Answer

Code

Answer

Stack

Answer

Data

Question 22

The number of processes completed per unit time is known as __________

Accepted Answer

Throughput

Answer

Output

Answer

Efficiency

Answer

Capacity

Question 23

The state of a process is defined by:

Accepted Answer

the current activity of the process

Answer

the final activity of the process

Answer

the activity just executed by the process

Answer

the activity to next be executed by the process

Question 24

Which of the following is not the state of a process?

Accepted Answer

Old

Answer

New

Answer

Waiting

Answer

Running

Question 25

The Process Control Block is:

Accepted Answer

Data Structure

Answer

Process type variable

Answer

A secondary storage section

Answer

A Block in memory

Question 26

The entry of all the PCBs of the current processes is in:

Accepted Answer

Process Table

Answer

Process Register

Answer

Program Counter

Answer

Process Unit

Question 27

The degree of multiprogramming is:

Accepted Answer

the number of processes in memory

Answer

the number of processes executed per unit time

Answer

the number of processes in the ready queue

Answer

the number of processes in the I/O queue

Question 28

A single thread of control allows the process to perform:

Accepted Answer

only one task at a time

Answer

multiple tasks at a time

Answer

only two tasks at a time

Answer

all of the above

Question 29

The objective of multiprogramming is to :

Accepted Answer

Have some process running at all times

Answer

Have multiple programs waiting in a queue ready to run

Answer

To minimize CPU utilization

Answer

None of the Above

Question 30

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

Accepted Answer

PCB queue

Answer

Job Queue

Answer

Device Queue

Answer

Ready Queue

Question 31

When the process issues an I/O request :

Accepted Answer

It is placed in an I/O queue

Answer

It is placed in a waiting queue

Answer

It is placed in the ready queue

Answer

It is placed in the Job queue

Question 32

When a process terminates :

Accepted Answer

It is removed from all queues

Answer

It is removed from all, but the job queue

Answer

Its process control block is de-allocated

Answer

Its process control block is never de-allocated

Question 33

What is a long-term scheduler ?

Accepted Answer

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

Answer

It selects which process has to be executed next and allocates CPU

Answer

It selects which process to remove from memory by swapping

Answer

None of the mentioned

Question 34

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

Accepted Answer

empty, little

Answer

full, little

Answer

full, lot

Answer

empty, lot

Question 35

What is a medium-term scheduler ?

Accepted Answer

It selects which process to remove from memory by swapping

Answer

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

Answer

It selects which process has to be executed next and allocates CPU

Answer

None of the mentioned

Question 36

What is a short-term scheduler ?

Accepted Answer

It selects which process has to be executed next and allocates CPU

Answer

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

Answer

It selects which process to remove from memory by swapping

Answer

None of the mentioned

Question 37

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

Accepted Answer

The frequency of their execution

Answer

The length of their queues

Answer

The type of processes they schedule

Answer

None of the Above

Question 38

The only state transition that is initiated by the user process itself is :

Accepted Answer

block

Answer

wakeup

Answer

dispatch

Answer

none of the above

Question 39

In a time-sharing operating system, when the time slot given to a process is completed, the process goes from the running state to the :

Accepted Answer

Ready state

Answer

Blocked state

Answer

Suspended state

Answer

Terminated state

Question 40

In a multiprogramming environment :

Accepted Answer

more than one process resides in the memory

Answer

the processor executes more than one process at a time

Answer

the programs are developed by more than one person

Answer

a single user can execute many programs at the same time

Question 41

Suppose that a process is in “Blocked” state waiting for some I/O service. When the service is completed, it goes to the :

Accepted Answer

Ready state

Answer

Running state

Answer

Suspended state

Answer

Terminated state

Question 42

The context of a process in the PCB of a process does not contain :

Accepted Answer

context switch time

Answer

the value of the CPU registers

Answer

the process state

Answer

memory-management information

Question 43

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

Accepted Answer

Translation lookaside buffer

Answer

General purpose registers

Answer

Program counter

Answer

All of the Above

Question 44

Which of the following does not interrupt a running process ?

Accepted Answer

Scheduler process

Answer

A device

Answer

Timer

Answer

Power failure

Question 45

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

Accepted Answer

cooperating process

Answer

child process

Answer

parent process

Answer

init process

Question 46

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

Accepted Answer

race condition

Answer

dynamic condition

Answer

essential condition

Answer

critical condition

Question 47

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

Accepted Answer

mutual exclusion

Answer

critical exclusion

Answer

synchronous exclusion

Answer

asynchronous exclusion

Question 48

Which one of the following is a synchronization tool?

Accepted Answer

semaphore

Answer

thread

Answer

pipe

Answer

socket

Question 49

A semaphore is a shared integer variable

Accepted Answer

that can not drop below zero

Answer

that can not be more than zero

Answer

that can not drop below one

Answer

that can not be more than one

Question 50

Mutual exclusion can be provided by the

Accepted Answer

binary semaphores

Answer

mutex locks

Answer

both mutex locks and binary semaphores

Answer

none of the above

Question 51

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

Accepted Answer

priority inversion

Answer

priority removal

Answer

priority exchange

Answer

priority modification

Question 52

Process synchronization can be done on

Accepted Answer

both hardware and software level

Answer

hardware level

Answer

software level

Answer

none of the above

Question 53

A monitor is a module that encapsulates

Accepted Answer

all of the above

Answer

shared data structures

Answer

procedures that operate on shared data structure

Answer

synchronization between concurrent procedure invocation

Question 54

To enable a process to wait within the monitor,

Accepted Answer

a condition variable must be declared as condition

Answer

condition variables must be used as boolean objects

Answer

semaphore must be used

Answer

all of the above

Question 55

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

Accepted Answer

overloading the system by creating a lot of sub-processes

Answer

overloading the system by using a lot of secondary storage

Answer

under-loading the system by very less CPU utilization

Answer

crashing the system by utilizing multiple resources

Question 56

A parent process calling _____ system call will be suspended until children processes terminate.

Accepted Answer

wait

Answer

fork

Answer

exit

Answer

exec

Question 57

Cascading termination refers to termination of all child processes before the parent terminates ______

Accepted Answer

Normally

Answer

Abnormally

Answer

Normally or abnormally

Answer

None of the above

Question 58

With _____________ only one process can execute at a time; meanwhile all other process are waiting for the processor. With ______________ more than one process can be running simultaneously each on a different processor.

Accepted Answer

Uniprogramming, Multiprocessing

Answer

Multiprocessing, Multiprogramming

Answer

Multiprogramming, Uniprocessing

Answer

Multiprogramming, Multiprocessing

Question 59

In UNIX, each process is identified by its :

Accepted Answer

Process Identifier

Answer

Process Control Block

Answer

Device Queue

Answer

None of the above

Question 60

In UNIX, the return value for the fork system call is _____ for the child process and _____ for the parent process.

Accepted Answer

Zero, A nonzero integer

Answer

A Negative integer, Zero

Answer

Zero, A Negative integer

Answer

A nonzero integer, Zero

Question 61

The child process can :

Accepted Answer

be a duplicate of the parent process

Answer

never be a duplicate of the parent process

Answer

cannot have another program loaded into it

Answer

never have another program loaded into it

Question 62

The child process completes execution, but the parent keeps executing, then the child process is known as :

Accepted Answer

Zombie

Answer

Orphan

Answer

Body

Answer

Dead

Question 63

Inter process communication :

Accepted Answer

allows processes to communicate and synchronize their actions without using the same address space

Answer

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

Answer

allows the processes to only synchronize their actions without communication

Answer

none of the above

Question 64

Message passing system allows processes to :

Accepted Answer

communicate with one another without resorting to shared data

Answer

communicate with one another by resorting to shared data

Answer

share data

Answer

name the recipient or sender of the message

Module 1 - Questions on Processes

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