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)
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