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18. John Ericsson was the first person to invent _______ .
(a) Mouse (b) Keyboard

(c) Monitor (d) LED
19. The data in a computer is stored in _______ .
(a) Pen drive (b) DVD

(c) Hard disk (d) CD
20. Which of the following app is used to watch cartoons and songs?

(a) (b)

(c) (d)

Answers

1. b. 2. c. 3. b. 4. b. 5. d. 6. b. 7. d. 8. c. 9. d. 10. b.
11. d. 12. d. 13. a. 14. b. 15. b. 16. b. 17. b. 18. c. 19. c. 20. b.

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