C 21118 (Pages : 2) न
ரதா பரு வ ‏ا ا م‎ ०४६
SIXTH SEMESTER B.Sc. DEGREE EXAMINA’ TION, MARCH 2017
(CUCBCSS—UG)

Time

11% 45 5

Computer Science
BCS 6B 13—FUNDAMENTALS OF OPERATING SYSTEM

: Three Hours ’ Maximum : 80 Marks

Part A

Answer all questions.
Each question carries 1 mark.

What is degree of multiprogramming ?

What do you mean by a process ?

What is PCB ?

What is hit ratio ?

In ——————— memory management technique, the logical address space is viewed as a collection

of logically related entities such as library routines, data structures, symbol tables, main programs
etc.

What is mutual exclusion ?

7. Name the two primitive operations used to access and manipulate a semaphore variable.

10

Lt.
12.
13.
14.
15.

is a technique of temporarily moving inactive programs from memory of a computer
system.
Name any two popular android operating systems.
is an approach to restricting system access to authorized users.
(10 x 1 = 10 marks)
Part B
Answer all questions.

Each question carries 2 marks.
Explain about real time operating systems.
Define a deadlock.
What is race condition ?
Distinguish between logical and physical address.

What do you mean by authorization ?
(5 x 2= 10 marks)

Turn over