BCA-07/DCA-102
December Examination 2016
BCA Pt. II/DCA Examination
Operating System I
Paper BCA-07/DCA-102
Time 3 Hours Max. Marks 100
Note: The question paper is divided into three sections B and C. Write answers as per given instructions.
Section A 10 × 2 20
(Very Short Answer Questions)
Note: Answer all questions. Limit to 30 words. All carries 2 marks.
What is shell?
What do you mean by Batch processing?
Name some GUI based operating system.
What is the use of fork( system call?
Why buffering is needed?
Name the principles of securing.
List the usage of spooling.
(viii) Define pages and frames.
What is overlaying?
What do you mean by turnaround time?
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BCA-07/DCA-102 200 2 (P.T.O.)
BCA-07/DCA-102 200 2
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Section B 4 × 10 40
(Short Answer Questions)
Note: Answer any four questions. Limit your answer to 200
words. All carries 10 mark each.
Compare peer-to-peer and client server computing environment.
Write short note on Process Control Block.
Why 'thread' is known as light weight process? Explain.
State critical-section problem. Also suggest the solution for
critical-section problem.
Differentiate compile time loading and run-time loading with
example.
How swapping is implemented by virtual memory? Explain.
What is thrashing? Explain the cause of thrashing.
Discuss access control mechanism in context to data files.
Section C 2 × 20 40
(Long Answer Questions)
Note: Answer any two questions. Limit your answer to 500
words. All carries 20 marks.
10) Define OS. Give the classification of operating system in detail.
11) What are the benefits of multithreading? Discuss multithreading
model in detail.
12) Explain the concept of demand paging with suitable example.
13) Write short note on the following:
Encryption and Decryption mechanism
Inverted page table