21. Which computer is commonly used in homes and offices?
A) Microcomputer
B) Supercomputer
C) Mainframe
D) Analog computer
Answer: A) Microcomputer
22. Laptop is an example of:
A) Microcomputer
B) Supercomputer
C) Mainframe
D) Analog computer
Answer: A) Microcomputer
23. Tablet computers are mainly used for:
A) Heavy scientific calculations
B) Portable computing
C) Industrial control
D) Weather prediction
Answer: B) Portable computing
24. Smartphones are categorized as:
A) Microcomputers
B) Supercomputers
C) Mainframe computers
D) Analog computers
Answer: A) Microcomputers
25. Which computer type is used in large organizations?
A) Microcomputer
B) Laptop
C) Mainframe
D) Tablet
Answer: C) Mainframe
26. The first electronic computer was:
A) UNIVAC
B) ENIAC
C) IBM PC
D) Mark I
Answer: B) ENIAC
27. The main operations of a computer include:
A) Input, Process, Output
B) Read, Write, Print
C) Type, Save, Delete
D) Copy, Paste, Edit
Answer: A) Input, Process, Output
28. Which device is used to enter data into the computer?
A) Input device
B) Output device
C) Storage device
D) Processing device
Answer: A) Input device
29. Which of the following is a storage device?
A) Hard disk
B) Mouse
C) Printer
D) Monitor
Answer: A) Hard disk
30. Which part stores data permanently?
A) RAM
B) Hard disk
C) CPU
D) Cache
Answer: B) Hard disk