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Class 3 Computer – Parts of Computer Worksheet

Last updated on June 28th, 2023 at 11:43 pm

Parts of A Computer Class 3 Worksheet


Parts of Computer Class 3 Worksheet Grade 3 Computer Question Answers | a computer system class 3 questions and answers | for the students of CBSE / …


Fill in the blanks:

Input devices are mainly …………………devices. [internal / external]

It is a device that fits under the palm of our hand. …………………mouse

It is an input device which is used for playing games…………………. joystick

Computer receives the data from ………………devices. input

Keyboard, mouse, and scanner are examples of ………………. devices. [input]


Answer the following questions: –


  • [Q] What is the process of entering data and instructions into a computer?
  • We use input devices like a keyboard and mouse to enter data and instructions.


  • [Q] What do you call the information that you enter into the computer?
  • Data


  • [Q] What part of a computer displays the output?
  • Monitor displays the output.


  • [Q] What is known as the brain of a computer?
  • CPU -central processing unit is known as the brain of the computer.


  • [Q] What is a computer?
  • A computer is a smart machine that can do many things – play games, write letters, draw pictures, listen to music, do the math, etc.


  • [Q] Define input?
  • An input device is a device that allows us to enter data and instructions into a computer using a keyboard or mouse.


  • [Q] Define output?
  • When data is processed in a CPU to produce useful information, this is referred to as output.


  • [Q] What are the main parts of the CPU?
  • A CPU is made up of 3 main parts: –
  • MU – Memory Unit
  • CU – Control Unit
  • ALU – Arithmetic and Logical Unit


  • [Q] How many types of monitors are there?
  • There are 3 types of monitors: –
  • CRT – Cathode Ray Tube
  • LCD – Liquid Crystal Display
  • LED – Light Emitting Diode


Write the full forms

IPO Input Process Output
CPU Central Processing Unit
CU Control Unit
VDU Visual Display Unit
MU Memory Unit
CU Control Unit
CRT Cathode Ray Tube
LCD Liquid Crystal Display
LED Light Emitting Diode


Also Check –  Computer Olympiad Mock Test Class 3 – QB

Important points: –

Computers work with data and instructions.

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