Operating System MCQs – Set 43

By Atul Sahu • Computer Science, Operating System

Operating System MCQs – Set 43

UGC NET Paper 2 Computer Science JULY 2016 – Operating System

841. Which is NOT correct about UNIX file system?

Operating System • File Systems: UNIX • UGC NET Paper 2 Computer Science JULY 2016

A. Superblock holds i-node & block info B. i-node has accounting & data pointers C. Each i-node is 256 bytes D. All files/dirs in data blocks

842. FIFO page faults for ref 0 1 2 3 0 1 4 0 1 2 3 4 with 3 and 4 frames.

Operating System • Memory Management – Paging • UGC NET Paper 2 Computer Science JULY 2016

A. 10,9 B. 9,9 C. 10,10 D. 9,10

843. After fork(), parent and child share which?

Operating System • Processes: fork() Behavior • UGC NET Paper 2 Computer Science JULY 2016

A. Heap B. Stack C. Shared memory D. Heap and Stack

844. In UNIX, finished but status-uncollected processes are ____.

Operating System • Processes: States • UGC NET Paper 2 Computer Science JULY 2016

A. Sleeping B. Stopped C. Zombie D. Orphan

845. MTBF = 30 days, MTTR = 12 hrs. Availability ≈ ?

Operating System • Reliability & Availability • UGC NET Paper 2 Computer Science JULY 2016

A. 0.963 B. 0.973 C. 0.983 D. 0.993

846. Which is NOT correct about UNIX signals?

Operating System • Signals • UGC NET Paper 2 Computer Science JULY 2016

A. INT on Ctrl-C requests terminate B. TERM requests clean exit C. QUIT like TERM but dumps core D. KILL is blockable

847. wc -l b & does what?

Operating System • Unix utilities • UGC NET Paper 2 Computer Science JULY 2016

A. Counts lines of a →b in foreground B. Counts lines of a →b in background C. Counts errors D. Copies lines

848. Which module gives CPU control to process selected by short-term scheduler?

Operating System • CPU scheduling • UGC NET Paper 2 Computer Science JULY 2016

A. Dispatcher B. Interrupt C. Scheduler D. Threading

849. In which disk algorithm does head move end-to-end and return without serving?

Operating System • Disk scheduling • UGC NET Paper 2 Computer Science JULY 2016

A. LOOK B. SCAN C. C-LOOK D. C-SCAN

850. In Distributed systems, capacity to adapt to increased load is called:

Operating System • Distributed systems • UGC NET Paper 2 Computer Science JULY 2016

A. Tolerance B. Scalability C. Capability D. Loading

851. Optimal order to store files to optimize access time is:

Operating System • File allocation • UGC NET Paper 2 Computer Science JULY 2016

A. F5,F2,F1,F3,F6,F4 B. F4,F6,F3,F1,F2,F5 C. F1,F2,F3,F4,F5,F6 D. F6,F5,F4,F3,F2,F1

852. Two atomic operations permissible on Semaphores are:

Operating System • Synchronization • UGC NET Paper 2 Computer Science JULY 2016

A. wait, stop B. wait, hold C. hold, signal D. wait, signal

853. Macro in assembly is?

Programming Languages • Assemblers • UGC NET Paper 2 Computer Science JULY 2016

A. subroutine B. complete program C. hardware D. relocatable code

854. Macro-processors are?

Programming Languages • Assemblers • UGC NET Paper 2 Computer Science JULY 2016

A. hardware B. compiler C. registers D. none

855. How many declarations correct? int z=7.0; double void=0.000; short array[2]={0,1,2}; char c="\n";

Programming Languages • C syntax & declarations • UGC NET Paper 2 Computer Science JULY 2016

A. 0 B. 1 C. 2 D. 4

856. Grammar check at compiler phase?

Programming Languages • Compilation phases • UGC NET Paper 2 Computer Science JULY 2016

A. semantic B. code gen C. syntax D. optimization

857. Object code output of?

Programming Languages • Compilers • UGC NET Paper 2 Computer Science JULY 2016

A. OS B. compiler/assembler C. assembler only D. compiler only

858. Which sets y=5 iff x==3?

Programming Languages • Control flow • UGC NET Paper 2 Computer Science JULY 2016

A. if(x=3)y=5 B. if x==3(y=5) C. if(x==3);y=5 D. if(x==3)y=5

859. Which loop body runs ≥1 time?

Programming Languages • Loops • UGC NET Paper 2 Computer Science JULY 2016

A. while B. do…while C. do…while zero+ D. for≠while

860. (13/4*3)%5+1 evaluates to?

Programming Languages • Operators & precedence • UGC NET Paper 2 Computer Science JULY 2016

A. 5.75 B. 2.95 C. 1.4875 D. 5

Disclaimer for MCQ Quiz
This quiz is for educational purposes only…

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Operating System MCQs – Set 43

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