16. (a) State the use of each of the following flowchart symbols. (3 marks)
The candidates were required to:
i) State the use of the flow chart symbols;
ii) Determine the output and input values from a given algorithm;
iii) Draw a flowchart for the algorithm.
Many candidates had problems in stating uses of flowchart symbols, determining output and input drawing the flow chart
i) An entry from, or an exit to another part of the program flowchart that is within the same page. It is an on page connector. (1 mark)
ii) A connector used instead of the connector symbol to designate entry to or exit from a page. It is an off page connector (1 mark)
iii) The beginning and/or end in a program. To start and/or stop/terminate in a program. (1 mark)
Source: KCSE Computer Studies 2012 - Paper 1
Question Number: 16 (a)(b)(c)
Marks: 15 Marks
From Topic: System Development
From Subtopic: Stages of system development (SDLC)
Question Level: Form 3
b) Below is an algorithm that is used to compute the values of R, S and T.
From the algorithm, determine the output if the input value of N is:
(i) 7 (3 marks)
(ii)10 (3 marks)
c) Draw a flowchart for the algorithm in Question 16 (b). (6 marks)
Advice to the teachers
Teachers to give candidates more practice in the topic.
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