Computer Studies 2021 Waec Past Questions and Answers

Question 1 :

• WAEC 2021

A collection of wires through which data are transmitted from one part of the computer to another is known as ____________

A. Address
B. Bus
C. Driver
D. Register

Question 2 :

• WAEC 2021

The total possible combinations of th input variables for a logic gate containing three input variables is ____________

A. 3
B. 4
C. 8
D. 12

Question 3 :

• WAEC 2021

What is the least number of 750 MB capacity CD-ROM discs needed to transfer 10 GB size file?

A. 75
B. 31
C. 14
D. 13

Question 4 :

• WAEC 2021

The logic gates represented in Figure 1 is called ____________

A. AND gate
B. NAND gate
C. NOR gate
D. OR gate

Question 5 :

• 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