State two practices to be observed in order to ensure the safety of the computer user. (2mks)
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Marking SchemeA school has been advised to employ a database administrator. State three responsibilities of this personnel in the school.
(b) Explain two ways in which computers can be used in the transport industry.
(c) Mary was advised to partition a hard disk for her computer. Explain two reasons that may have necessitated this. (d) Explain a reason for conducting each of the following studies in systems development: (i) Schedule feasibility; (ii) Technical feasibility.
RESPONSES
a) Possible responsibilities of a database admin in a school
Distinguish between a microwave transmission and a radio transmission.
(b) Figure 1 shows a computer, network topology. Use it to answer the questions that follow.
(i)Identify the type of topology.
(ii) State the function of each of the parts labelled A and B. (c) A computer laboratory experiences power supply problems. Describe three power related problems that should be addressed.
RESPONSES
b) (i) Bus topology
(ii) A - The Bus cable
c) Problems related to power that should be addressed
Describe three arithmetic errors that may occur during computerised data processing.
(b) Arnold a programmer intends to create a user input interface screen for a system. State three factors that he should consider.
(c)With the aid of an example in each case describe the following types of maintenance. (i) adaptive; (ii) perfective; (iii) corrective.
RESPONSES
a) Arithmetic errors
Truncation error
(i) Adaptive
State two qualities of a good pseudocode.
(b) With the aid of flowchart diagrams, describe each of the following programme control structures:
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