class 9 computer system practice exercise

EXERCISE 

CBSE Class 9 Computer Applications 

Que 1. A collection of eight bits is called _____

(a) byte
(c) record
(b) word
(d) file

Que 2. Which of the following is an example of non-volatile memory?

(a) ROM
(b) RAM
(c) LSI
(d) VLSI

Que 3. Which of the following is a unit of measurement used with a computer system?

(a) byte
(b) megabyte
(c) gigabyte
(d) All of the above

Que 4. Which of the following statements is false?

(a) secondary storage is non-volatile
(b) primary storage is volatile
(c) when the computer is turned off, data and instructions stored in primary storage are erased
(d) None of the above

Que 5. What does OCR stand for?

(a) Optical Character Reader
(b) Optical Character Recognition
(c) Operational Character Reader
(d) Only Character Reader

Que 6. Dot Matrix is a type of

(a) Tape
(c) Printer
(b) Disk
(d) Bus

Que 7. The secondary storage devices can only store data but they cannot perform

(a) Arithmetic operations
(b) Logic operations
(c) Fetch operations
(d) Either of the above

Que 8. Which of the following does not represent an I/O device?

(a) Speaker which beeps
(b) Plotter
(c) Joystick
(d) ALU

Que 9. Which of the following is a correct definition of volatile memory?

(a) It loses its contents at high temperatures
(b) It is to be kept in airtight boxes
(c) It loses its contents on failure of power supply
(d) It does not lose its contents on failure of
power supply

Que 10. One thousand bytes represent a

(a) Megabyte
(b) Gigabyte
(c) Kilobyte
(d) None of the above

Que 11. Large amounts of cheques are processed by using

(a) OCR
(b) MICR
(c) OMR
(d) All of the above

Que 12. The concentric circles on the floppy disk are further divided into:

(a) Tracks
(b) Sectors
(c) Cylinders
(d) None of the above

Que 13. Which of the following storage devices can be used for storing large backup data ?

(a) Floppy disks
(b) Hard disk
(c) Magnetic tapes
(d) None of the above

Que 14. Control Unit (CU) is called the _____ of a computer.

(a) Heart
(b) Nerve centre or brain
(c) Primary memory
(d) All of the abovve

Que 15. What does a storage unit provide ?

(a) A place to show data
(b) A place to store currently worked on information
(c) A place to store information

Que 16. What are the four basic components of a computer?

(a) Input devices, output devices, printing, and typing
(b) Input devices, processing unit, storage, and output devices
(c) Input devices, CPU, output devices, and RAM

Que 17. What are examples of storage devices?

(a) Keyboards, flash drive, printer
(b) Flash drive, RAM, DVD-ROM
(c) Hard drive, DVD-ROM, flash drive

Que 18. What is the processing unit?

(a) The brains of the computer
(b) This is the main circuit board that all other internal components are connected to.
(c) A device that receives, processes, and presents information.

Que 19. What does RAM stand for?

(a) Retrieve Alternate Memory
(b) Read Always Memory
(c) Random Access Memory

Que 20. What kind of information can be found in a ROM?

(a) Software
(b) The operating system
(c) Basic Input/Output System