Operating System Questions & Answers [Processes] ⋆ csestudy247

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This page provide you Operating system multiple choice question with answer that is very useful for Semester , DRDO , ISRO , Banking , Railway Exam.

These MCQs Based on the Processes Chapter of operating System

Operating system

An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs.

Q.1 A program in execution is called ?

A) Process

B) Software

C) Compiler

D) Application

ANSWER= (A) Process

Q.2 A program is an — entity.

A) Active

B) Passive

C) Both A & B

D) None

ANSWER= (B) Passive

Q.3 Process is ?

A) Software

B) A Program in execution

C) Contents of main memory

D) None

ANSWER= (B) A Program in execution

Q.4 Which system call is used in unix to terminate the execution of process ?

A) Fork

B) Create

C) Exit

D) Exe

ANSWER= (C) Exit

Q.5 Which of the following does not interrupt the running process?

A) Timer interrupt

B) Power failure

C) Scheduler process

D) None

ANSWER= (C) Scheduler process

Q.6 A program is an active entity.

A) True

B) False

C) May be

D) None

ANSWER= (B) False

Q.7 CPU performance is measured through ?

A) Hit ratio

B) Throughput

C) MHz

D) None

ANSWER= (B) Throughput

Q.8 —- is used to store temporary data for process ?

A) Data Section

B) Stack

C) Heap

D) Program Counter

ANSWER= (B) Stack

Q.9 — Memory that is dynamically alloccated during process execution ?

A) Data Section

B) Stack

C) Heap

D) Program Counter

ANSWER= (C) Heap

Q.10 A process stack does not contain ?

A) Local variable

B) Function parameters

C) PID of child process

D) Return addresses

ANSWER= (C) PID of child process

Q.11 A process structure does not contain

A) Code

B) stack

C) Data

D) Bootstrap program

ANSWER= (D) Bootstrap program

Q.12 Why is CPU Scheduling done

A) Increase CPU Utilisation

B) Decrease CPU Utilisation

C) Decrease cost

D) None

ANSWER= (A) Increase CPU Utilisation

Q.13 The most optimal CPU scheduling algorithm is

A) Shortest job first

B) First come first serve

C) Round robin

D) None

ANSWER= (A) Shortest job first

Q.14 Which of the following is not process state ?

A) New

B) Running

C) Ready

D) Finished

ANSWER= (D) Finished

Q.15 Which of the following is not the state of process

A) New

B) Old

C) Waiting

D) Running

ANSWER= (B) Old

Q.16 The state of a process is define by

A) The final activity of the process

B) The activity just executed by the process

C) The activity to next be executed by the process

D) The current activity of the process

ANSWER= (D) The current activity of the process

Q.17 What is the ready state of a process ?

A) When process is schduled to run after some execution

B) When process is unable to run until some task has been completed

C) When process is using the CPU

D) None

ANSWER= (A) When process is schduled to run after some execution

Q.18 Running multiple programs at the same time is called:

A) Multitasking

B) Foreground tasking

C) Single tasking

D) None

ANSWER= (A) Multitasking

Q.19 Only state transition that is initiated bt the user process itself is ?

A) Dispatch

B) Block

C) Backup

D) None

ANSWER= (B) Block

Q.20 Suppose that a process is in ‘BLOCKED’ state waiting for some I/O service. When the service is completed, it goes to the

A) Ready state

B) Block State

C) Running State

D) Terminated state

ANSWER= (A) Ready state

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