cameroon gce O level June 2023 computer science 2

cameroon gce O level June 2023 computer science 2

cameroon gce O level June 2023 computer science 2

Long term use of computer equipment can lead to health problems. State one health problem that may result from:
(i ) Long term use of the keyboard.
(ii) Long term use of the screen.
(iii) What problem does ergonomics address?
(iv) How can ergonomics be applied in order to solve the problem of (i ) and (ii) above?

(a) Consider the following Boolean expression
Q = (A . B) + (A + B)
Draw the logic circuit that corresponds to the expression of Q.
Copy and complete the truth table in Table 2:

(4 marks)
(iii) What does a truth table represent? (2 marks)
(b) Briefly explain each of the following:
Computer network
Computer ethics
Network protocol
(0 (2 marks)
(2 marks)
(2 marks)
With the aid of a sketch, briefly explain the difference between tracks and sectors on a magnetic disk(c)