Showing posts with label Medium term scheduler. Show all posts
Showing posts with label Medium term scheduler. Show all posts

Saturday, September 12, 2020

Operating system MCQ

Q.1 Translator for low level programming language were termed as

(A) Assembler 

(B) Compiler

(C) Linker 

(D) Loader

Ans: (A)


Q.2 Analysis which determines the meaning of a statement once its grammatical structure

becomes known is termed as

(A) Semantic analysis 

(B) Syntax analysis

(C) Regular analysis 

(D) General analysis

Ans: (A)


Q.3 Load address for the first word of the program is called

(A) Linker address origin 

(B) load address origin

(C) Phase library 

(D) absolute library

Ans: (B)


Q.4 Symbolic names can be associated with

(A) Information 

(B) data or instruction

(C) operand 

(D) mnemonic operation

Ans: (B)


Q.5 The translator which perform macro expansion is called a

(A) Macro processor 

(B) Macro pre-processor

(C) Micro pre-processor 

(D) assembler

Ans: (B)


Q.6 Shell is the exclusive feature of

(A) UNIX 

(B) DOS

(C) System software 

(D) Application software

Ans: (A)


Q.7 A program in execution is called

(A) Process 

(B) Instruction

(C) Procedure 

(D) Function

Ans: (A)


Q.8 Interval between the time of submission and completion of the job is called

(A) Waiting time 

(B) Turnaround time

(C) Throughput 

(D) Response time

Ans: (B)


Q.9 A scheduler which selects processes from secondary storage device is called

(A) Short term scheduler. 

(B) Long term scheduler.

(C) Medium term scheduler. 

(D) Process scheduler.

Ans: (C)


Q.10 The scheduling in which CPU is allocated to the process with least CPU-burst time is called

(A) Priority Scheduling 

(B) Shortest job first Scheduling

(C) Round Robin Scheduling 

(D) Multilevel Queue Scheduling

Ans: (B)


Q.11 The term ‘page traffic’ describes

(A) number of pages in memory at a given instant.

(B) number of papers required to be brought in at a given page request.

(C) the movement of pages in and out of memory.

(D) number of pages of executing programs loaded in memory.

Ans: (C)


Q.12 The “turn-around” time of a user job is the

(A) time since its submission to the time its results become available.

(B) time duration for which the CPU is allotted to the job.

(C) total time taken to execute the job.

(D) time taken for the job to move from assembly phase to completion phase.

Ans: (C)


Q.13 Which of the following can be used as a criterion for classification of data

structures used in language processing.

(A) nature of a data structure 

(B) purpose of a data structure

(C) lifetime of a data structure 

(D) all of the above.

Ans: (D)


Q.14 Memory utilization factor shall be computed as follows

(A) memory in use/allocated memory.

(B) memory in use/total memory connected.

(C) memory allocated/free existing memory.

(D) memory committed/total memory available.

Ans: (B)


Q.15 Program ‘preemption’ is

(A) forced de allocation of the CPU from a program which is executing on the CPU.

(B) release of CPU by the program after completing its task.

(C) forced allotment of CPU by a program to itself.

(D) a program terminating itself due to detection of an error.

Ans: (A)


Q.16 An assembler is

(A) programming language dependent.

(B) syntax dependant.

(C) machine dependant.

(D) data dependant.

Ans: (C)


Q.17 Which of the following is not a fundamental process state

(A) ready 

(B) terminated

(C) executing 

(D) blocked

Ans: (D)


Q.18 ‘LRU’ page replacement policy is

(A) Last Replaced Unit. 

(B) Last Restored Unit.

(C) Least Recently Used. 

(D) Least Required Unit.

Ans: (C)


Q.19 Which of the following is true?

(A) Block cipher technique is an encryption technique.

(B) Steam cipher technique is an encryption technique.

(C) Both (A) and (B).

(D) Neither of (A) and (B).

Ans: (C)


Q.20 Which of the following approaches do not require knowledge of the system state?

(A) deadlock detection. 

(B) deadlock prevention.

(C) deadlock avoidance. 

(D) none of the above.

Ans: (D)


Q.21 Program generation activity aims at

(A) Automatic generation of program

(B) Organize execution of a program written in PL

(C) Skips generation of program

(D) Speedens generation of program

Ans: (A)


Q.22 Which amongst the following is not an advantage of Distributed systems?

(A) Reliability 

(B) Incremental growth

(C) Resource sharing 

(D) None of the above

Ans: (A)


Q.23 An imperative statement

(A) Reserves areas of memory and associates names with them

(B) Indicates an action to be performed during execution of assembled program

(C) Indicates an action to be performed during optimization

(D) None of the above

Ans: (B)


Q.24 Which of the following loader is executed when a system is first turned on or restarted

(A) Boot loader 

(B) Compile and Go loader

(C) Bootstrap loader 

(D) Relating loader

Ans: (C)


Q.25 Poor response time is usually caused by

(A) Process busy

(B) High I/O rates

(C) High paging rates

(D) Any of the above

Ans: (D)


Q.26 “Throughput” of a system is

(A) Number of programs processed by it per unit time

(B) Number of times the program is invoked by the system

(C) Number of requests made to a program by the system

(D) None of the above

Ans: (A)

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