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Cisy 201:Computer Organization And Archtecture Question Paper

Cisy 201:Computer Organization And Archtecture

Course:Computer Science

Institution: Kenya Methodist University question papers

Exam Year:2013

KENYA METHODIST UNIVERSITY

END OF 3''RD ''TRIMESTER 2013 (PT) EXAMINATION
FACULTY : COMPUTING & INFORMATICS
DEPARTMENT : COMPUTER SCIENCE AND BUSINESS INFORMATION
UNIT CODE : BBIT 112/CISY 111
UNIT TITLE : COMPUTER ORGANISATION AND ARCHITECTURE
TIME : 2 HOURS

Instructions:

SECTION A: Compulsory

Question One

Describe the following structures components of compute systems. State their functions and how they are organized.

(12mks)

C.P.U
I/O Devices
Memory
Interconnection structure.

Analyse the basic instruction cycle with provision of interrupts. Describe the steps of fetch-execute cycle and interrupt cycle.

(8mks)

What are the limitation of Bus performance. State two.

(4mks)

Describe the following in the context of bus.

(6mks)

Bus arbitration
Timing

SECTION B: Answer any two questions from this section

Question Two

Provide a reason why peripherals cannot be connected directly to system bus.

(3mks)

Describe the following I/O functionality.

(6mks)

Control al timing
CPU communication
Data buffering

Describe the concept of direct memory access as a solution to input/output challenges.

(5mks)

Explain the three categories of I/O devices.

(6mks)

Question Three

Explain the role of the following memories.

(6mks)

Main memory
Cache memory
Virtual memory
Explain the following memory access method and give examples. (8mks)
Sequential
Direct
Random
Associative

The information stored in n level memory hierarchy, M1 to Mn, should satisfy the three important properties inclusion, coherence and locality. Explain the three properties.

(6mks)

Question Four

Describe the structure of hard disk in terms of cylinders, tracks, sectors and R/W heads.

(6mks)

Describe the functions of the following CPU components.

(8mks)

Arithmetic and logic unit
Control unit
Register
Internal bus

Using FLYnn taxonomy describe the three main classes of parallel process.

(6mks)

Cisy 201:Computer Organization And Archtecture Question Paper

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