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MULTIMEDIA UNIVERSITY OF KENYA
FACULTY OF COMPUTING & INFORMATION TECHNOLOGY
UNIVERSITY EXAMINATIONS 2017/2018
FIRST YEAR SECOND SEMESTER CAT FOR THE DEGREE OF
BACHELOR OF COMPUTER SCIENCE
UNIT CODE: CCS 2124: UNIT NAME: OPERATING SYSTEMS 1
DATE: JULY 2018 TIME: 2 HOURS
INSTRUCTIONS:
ANSWER YOUR QUESTIONS IN ANSWER BOOKLET PROVIDED
ANSWER ALL QUESTIONS
QUESTION ONE
a. Explain interrupts and traps, and provide a detailed account of how the operating system
handles an interrupt. [5 marks]
b. Define context switching. Outline all the activities of context switching. [5 marks]
c. Define the five (5) states of a process. Draw the process state diagram from its creation to
termination, including all transitions, and briefly describe every state and every
transition. [5 marks]
d. A good solution to the critical section problem must satisfy the three conditions; mutual
exclusion, progress and bounded waiting. Both progress and bounded waiting involve
some form of waiting. Differentiate the waiting in progress and bounded waiting.
[5 marks]
