University of Pune 2007 B.C.A Computer Application OPERATING SYSTEM - exam paper

[2996]-401
B.C.A. (Semester-IV) Examination-2006
OPERATING SYSTEM
Time: three Hours] [Max. marks: 80
Instructions:
(1) All ques. are compulsory.
(2) Draw figures wherever necessary.

Q1) Attempt any ten out of twelve: (2 marks each) [20]
Define:
(a) Turn Around Time
(b) CPU Utilization
(c) Interrupt Handler
(d) Multiprocessor
(e) Kernel
(f) Frame
(g) Trap
(h) Dispatcher
(i) Logical Address
(j) Swapping
(k) Deadlock
(l) IR





Q2) Attempt any 5 out of six: (5 marks each) [25]

(a) Calculate avg. Turn Around Time and avg. Waiting Time for Non-pre-emptive scheduling algorithm for FCFS and SJF scheme. presume all processes have arrived at time t = 0:
Process CPU Burst
P1 10
P2 1
P3 2
P4 1
P5 5

(b) The Operating System as Resource Manager. Comment.
(c) Explain Processor Registers.
(d) Write short note on Microkernel Architecture.
(e) Explain Single Buffering and Double Buffering.
(f) Explain Fixed Partitioning with the help of diagram.

Q3) Attempt any 1 out of two: [10]

(a) Explain elaborate various I/O Communication Techniques in detail.
OR
discuss basic Instruction Cycle without Interrupt.
(b) Explain Resource Allocation Graphs.



Q4) Attempt any 5 out of six: (5 marks each) [25]

(a) What are the functions of Operating System?
(b) Explain Process Control Block (PCB) in detail.
(c) What is Cache Memory?
(d) Compare Uni-programming and Multi-programming.
(e) What is Long Term, Short Term and Medium Term Scheduler?
(f) Compare:
(1) Pre-emptive and Non-pre-emptive Scheduling
(2) Process Switch and Mode Switch

Earning:   Approval pending.