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Dit 101:Information Techniques And Operating System Question Paper

Dit 101:Information Techniques And Operating System

Course:Diploma In It

Institution: Kenya Methodist University question papers

Exam Year:2013

KENYA METHODIST UNIVERSITY

END OF 2''ND ''TRIMESTER 2013 EXAMINATION
FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : CIS & BI
UNIT CODE : DIT 101
UNIT TITLE : INFORMATION TECHNIQUES AND OPERATING
SYSTEM
TIME : 2 HOURS

Instructions:

Answer question one and any other two questions

Question One

Mention any four objectives which must be considered in designing of scheduling algorithm? Explain

(8 marks)

Briefly explain the meaning of the following concepts

Virtual memory

(4 marks)

Cache memory

(4 marks)

State and explain four major components found in the system unit and their functions.

(8 marks)

Describe three main buses.

(6 marks)

Question Two

Describe four conditions that must hold for a deadlock to occur in operating system.

(8 marks)

Explain the term memory protection.

(3 marks)

Differentiate between a bit and a byte.

(2 marks)

Define a virus and list any five effects of a virus.

(7 marks)

Question Three

Describe any three operating system security goals.

(6 marks)

Define interrupts and explain three sources of interrupts in OS.

(6 marks)

Briefly explain the meaning of the term CPU and describe three main components of a Central Processing Unit.

(12 marks)

Question Four

Explain the following memory allocation schemes

Contigeous allocation

(3 marks)

Segmentation

(3 marks)

Briefly describe any three types of secondary storage that are used in information technology applications.

(6 marks)

Differentiate between SRAM and DRAM and with reasons state which is suitable for making cache memory.

(4 marks)

Differentiate between Computer Architecture and Computer Organization.

(4 marks)

Question Five

Describe four strategies to overcome deadlock once it is detected. (8 marks)

The main role of the CPU is to execute instructions. Explain the steps involved during the execution of an instruction.

(8 marks)

Explain the following terms and state how they affect system performance.

Bus width

(2 marks)

Word size

(2 marks)

Dit 101:Information Techniques And Operating System Question Paper

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