Waec Computer Studies Past Questions and Answers

Question 61:

• WAEC 2021

Use the logic gate in Fig 2 to answer question 12.
Which of the logic gates will give an output opposite to the input state?

A. X
B. Y
C. Z
D. X and Y

Question 62:

• WAEC 2021

Use the logic gate in Fig 2 to answer question 13.
Which of the following statements is true about logic gates X and Y?

A. They both have multiple output variables
B. The output state of each depends on the input state
C. The output is true only if all inputs are true
D. They are both equivalent gates.

Question 63:

• WAEC 2021

The logical equation for the logic circuit in Figure 3 is ____________

A. \(\overline{A+B}\) \(\overline{C}\)
B. Z=A.B+C
C. Z=A+B.C
D. Z=\(\overline{A.B}\) + \(\overline{C}\)

Question 64:

• WAEC 2021

The operation of a computer and peripherals attached to it is controlled by

A. Application
B. Hardware
C. Live ware
D. System software

Question 65:

• WAEC 2021

COBOL was developed for ____________

A. Business operations
B. Game developers
C. Mobile application developers
D. Search engines optimization