MCA-11
December Examination 2016
MCA IInd Year Examination
Operating System
Paper MCA-11
Time 3 Hours Max. Marks 80
Note: The question paper is divided into three sections B and C. Write answers as per given instructions.
Section A 8 × 2 16
(Very Short Answer Questions)
Note: Answer all questions. As per the nature of the question delimit your answer in one word, one sentence or maximum upto 30 words. Each question carries 2 marks.
What is deadlock?
List the features of real time system.
What is thrashing?
Define operating system.
What do you mean by batch?
Explain system call.
Give one difference between parallel system and distributed system.
(viii) What is I/O buffering?
572
MCA-11 100 3 (P.T.O.)
MCA-11 100 3 (Contd.)
572
Section B 4 × 8 32
(Short Answer Questions)
Note: Answer any four questions. Limit to answer questions is
200 words.
What is process? Describe process state transition diagram in
detail.
When does Race condition arises? Give the solution of Race
condition.
Compare sequential access and random access files.
Write short note on Interrupt Handlers.
Discuss the uses and design issues of thread.
Explain the concept of swapping in detail.
Explain three allocation methods in file system implementation.
Illustrate with proper diagram.
Why security and protection is necessary in operating system?
Explain.
Section C 2 × 16 32
(Long Answer Questions)
Note: Answer any two questions. You have to delimit your each
answer maximum upto 500 words. Each question carries
16 marks.
10) Give the necessary conditions of deadlock. Explain Banker's
algorithm with example.
MCA-11 100 3
572
11) What is demand paging? Consider the following reference
string 0. 1. Assume
there are 3 frames. Apply LRU replacement algorithm to the
reference string above and find out how many page fault are
produced. Illustrate the LRU page replacement algorithm in
detail and also two feasible implementation of LRU algorithm.
12) What is distributed operating system? How distributed system
coping the failure? Explain.
13) Write short note on the following:
Remote procedure call
Cryptography in OS