Digital Electronics N5 December Past Papers and Memos

1. Q1 Various options are given as possible answers to the following questions. Choose the 6 marks
2. Q2 Choose a term from COLUMN B that matches a description in COLUMN A. Write only 5 marks
3. Q3 3.1 Convert each of the following numbers to their binary equivalents: 15 marks
4. Q4 You are requested to design a circuit that will convert the 8.4.2.1 code to Excess-3 BCD. 24 marks
5. Q5 With reference to TTL NAND gates, answer the following questions: 10 marks
6. Q6 ASCII is a code that represents all the characters on a computer keyboard. 5 marks
7. Q7 With reference to computers, answer the following questions: 8 marks
8. Q8 With reference to digital to analog converters answer the following questions: 6 marks
9. Q9 With reference to computers, answer the following questions: 6 marks
10. Q10 10.1 With reference to input and output devices, answer the following questions: 15 marks

Instructions to candidates

1. Answer all the questions.
2. Read all the questions carefully.
3. Number the answers according to the numbering system used in this question paper.
4. Use only a black or blue pen.
5. Calculation processes and calculated answers must be given in THREE fractional radix spaces, for example 10, 101.
6. Write neatly and legibly. (8080365) -3-