University of Pune 2007 B.C.A Computer Application OPERATING SYSTEM - Question Paper

[3196]-401
B.C.A. (Semester-IV) Examination-2007
OPERATING SYSTEM
Time: three Hours] [Max. marks: 80
Instructions:
(1)All ques. are compulsory.
(2)Draw figure wherever necessary.

Q1) Attempt any ten: (2 marks each) [20]

(1)Interrupt
(2)Page
(3)Throughput
(4)Starvation
(5)Time Slice
(6)Multiprogramming
(7)Process
(8)Physical Address
(9)Swapping
(10) Frames
(11) Trap
(12) Waiting Time

Q2) Attempt any five: (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 29
P3 3
P4 7
P5 12

(b)Explain in brief Instruction Cycle.
(c)What is Process? discuss Process Control Block (PCB) in detail.
(d)Explain Segmentation in brief.
(e)Explain Internal and External Fragmentation.
(f)Explain in brief Client/ Server Model.

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

(a)Explain in brief Paging Mechanism in Virtual Memory.
OR
(a)Explain in brief DMA.

(b)Explain in brief Circular Buffering.

Q4) Attempt any five: (5 marks each) [25]

(a)List and briefly describe 3 main I/O Communication Techniques.
(b)Explain Resident Monitor in brief.
(c)Explain Traditional Unix Kernet in detail.
(d)Explain Resource Management in Multiprogramming
(e)Explain various Services given by Operating System
What is Cache? discuss Cache Principles

Earning:   Approval pending.