Operating System MCQs – Set 41

By Atul Sahu • Computer Science, Operating System

Operating System MCQs – Set 41

UGC NET Paper 2 Computer Science JUNE 2014 – Operating System

801. Preemptive priority scheduling (dynamic): a=2 waiting, b=1 running, q=1; P1–P4 arrivals as given. Finish times P1,P2,P3,P4 =

Operating System • CPU Scheduling • UGC NET Paper 2 Computer Science JUNE 2014

A. 4,5,7,8 B. 8,2,7,5 C. 2,5,7,8 D. 8,2,5,7

802. After P1’s extra R1 & R3, the system is ___.

Operating System • Deadlock Avoidance • UGC NET Paper 2 Computer Science JUNE 2014

A. Ready B. Safe C. Blocked D. Unsafe

803. Match deadlock handling techniques: a.Timeout ordering protocol b.Prevention c.Detection d.Recovery → codes? (i) Timeout ordering (ii) Prevention (iii) Detection (iv) Recovery

Operating System • Deadlock Handling • UGC NET Paper 2 Computer Science JUNE 2014

A. iv iii i ii B. iii ii iv i C. i ii iii iv D. ii i iv iii

804. Disk queue requests to cylinders [98,183,37,122,14,124,65,67], head at 53 moving toward 0. Total head movements for SSTF and SCAN =

Operating System • Disk Scheduling • UGC NET Paper 2 Computer Science JUNE 2014

A. 236 & 252 B. 640 & 236 C. 235 & 640 D. 235 & 252

805. Pages 0–7, frames=4. Reference string missing—cannot compute LRU vs Optimal faults.

Operating System • Disk Scheduling • UGC NET Paper 2 Computer Science JUNE 2014

A. … reference string … B. … C. … D. …

806. Which is NOT true about disk-arm scheduling?

Operating System • Disk Scheduling • UGC NET Paper 2 Computer Science JUNE 2014

A. SSTF improves over FCFS B. Requests unaffected by file allocation C. Caching dirs reduces arm moves D. SCAN/C-SCAN avoid starvation

807. Match file allocation: a=Contiguous,b=Linked,c=Indexed,d=Multi-level indexed codes below.

Operating System • File Systems • UGC NET Paper 2 Computer Science JUNE 2014

A. iii iv ii i B. iii ii iv i C. i ii iv iii D. i iv ii iii

808. Unix free disk blocks list is stored in the ___.

Operating System • File Systems • UGC NET Paper 2 Computer Science JUNE 2014

A. i-node B. boot block C. superblock D. FAT

809. Space to store bitmap of 1.3 GB disk with 512 B blocks =

Operating System • File Systems: Bitmaps • UGC NET Paper 2 Computer Science JUNE 2014

A. 332.8 KB B. 83.6 KB C. 266.2 KB D. 256.6 KB

810. Paged system: TLB hit 70%, TLB=30 ns, mem=100 ns. Effective access time = ___.

Operating System • Memory Management • UGC NET Paper 2 Computer Science JUNE 2014

A. 91 ns B. 69 ns C. 200 ns D. 160 ns

811. On a uniprocessor with arrival rate λ=5/min and service time=6 s, CPU utilization ρ is:?

Operating System • Performance Modeling • UGC NET Paper 2 Computer Science JUNE 2014

A. 0.8 B. 0.5 C. 0.6 D. 0.3

812. Linux OS uses

Operating System • Process Scheduling • UGC NET Paper 2 Computer Science JUNE 2014

A. Affinity Scheduling B. Fair Preemptive Scheduling C. Hand Shaking D. Highest Penalty Ratio Next

813. Match schedulers: a=ML feedback,b=FCFS,c=SPN,d=RR codes below.

Operating System • Scheduling • UGC NET Paper 2 Computer Science JUNE 2014

A. i iii ii iv B. iv iii ii i C. iii i iv i D. ii iii iv i

814. What does `seq 1 2 10` print on Linux?

Operating System • Shell Utilities • UGC NET Paper 2 Computer Science JUNE 2014

A. 1 2 10 B. 1 2 3 … 10 C. 1 3 5 7 9 D. 1 5 10

815. Which is non-portable in Windows 2000?

Operating System • Windows Architecture • UGC NET Paper 2 Computer Science JUNE 2014

A. Device management B. Virtual memory management C. Processor management D. User interface

816. Assignment problem: (a) minimize cost, (b) special case of transportation, (c) one activity per resource. Which?

Operating System • Combinatorial Optimization • UGC NET Paper 2 Computer Science JUNE 2014

A. (a)&(b) B. (a)&(c) C. (b)&(c) D. (a),(b)&(c)

817. Java uses threads to enable the environment to be _____.

Operating System • Concurrency • UGC NET Paper 2 Computer Science JUNE 2014

A. Symmetric B. Asymmetric C. Synchronous D. Asynchronous

818. Given process–resource graph, is system deadlocked? If yes, which?

Operating System • Deadlock • UGC NET Paper 2 Computer Science JUNE 2014

A. No B. Yes: A,B,C C. Yes: D,E,G D. Yes: A,B,F

819. Three processes peak 2,5,7 share m resources. For which m no deadlock?

Operating System • Deadlock • UGC NET Paper 2 Computer Science JUNE 2014

A. 7 B. 13 C. 14 D. 70

820. Safety algorithm time complexity for n processes & m resource types is:

Operating System • Deadlock Avoidance • UGC NET Paper 2 Computer Science JUNE 2014

A. O(m n) B. O(m² n²) C. O(m² n) D. O(m n²)

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

0 0 votes

Article Rating

0 Comments

Oldest

Newest Most Voted

Inline Feedbacks

View all comments

Operating System MCQs – Set 41

Related Posts