August 1997
CS202: COMPUTER ARCHITECTURE AND DATA COMMUNICATION

QUESTION 1 (Compulsory)

Total Marks: 20 Marks

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SUGGESTED SOLUTIONS
for Question 1
1. (a) What is meant by the following terms?
(i) Register addressing [2]
(ii) Implied addressing [2]
(iii) Fetch cycle [2]
(iv) Execute cycle [2]
(v) I/O direct memory access (DMA) [2]
(b) (i) Explain, with the aid of diagram, the role of a multiplexer in data communications. [3]
(ii) What are the differences between time-division multiplexing (TDM) and frequency-division multiplexing (FDM)? What are the disadvantages of each? [5]
(iii) How does statistical time-division multiplexing (STDM) improve on TDM? What additional resource does STDM have? [2]