Types of hardware

 Computer Applications
Class IX



Types of Hardware (chap-1)
1. Hardware- Hardware refers to physical parts of the computer that can be touched physically. For example monitor, keyboard, hard drive etc.
2. Classification of Hardware-
• CPU (Central Processing Unit)
• Memory- A. Primary Memory (Internal Memory)
a. ROM (Read Only Memory)
b. RAM (Random Access Memory
B. Secondary Memory (Auxiliary Memory)
• All Storage devices like hard disk, CD, DVD, pen drive etc.
• Input Devices
• Output Devices
3. Memory in a Computer System-
a. Main Memory or primary memory or internal memory- The memory that holds data and instructions during processing. It is temporary memory.
b. Auxiliary or secondary or external memory- The memory that can store data or files for later use i.e. permanently. 4. Units of Memory - Computers store and process data in the form of binary numbers. A binary number is either a ‘0’ or a ‘1’ and is known as bit, which is the short form for binary digit.
Unit Short Name Full Name
1Bit
Bit
Binary Digit
8 Bits
1 Byte
Byte
1024 bytes
1 KB
Kilo Byte
1024 KB
1 MB
Mega Byte
1024 MB
1 GB
Giga Byte
1024 GB
1 TB
Terra Byte
1024 TB
1 PB
Peta Byte
1024 PB
1 EB
Exa Byte
Assignment 1 (Chap2):-
Q1. Multiple choice questions;-
i. The part of a computer that allows the user to view information on a screen.
a. Mouse b. RAM c. Monitor d. CPU
ii. This part sends signals to other parts of the computer to tell them what to do.
a. Keyboard b. Mouse c. Hard disk d. CPU
iii. This memory is for short term storage and is lost when the computer is turned off.
a. ROM b. RAM c. Hard disk d. CPU
iv. This part allows the user to hear information from the computer.
a. Monitor b. Software c. Input d. Speaker
v. Another name for all the parts of a computer.
a. Monitor b. Software c. Process d. Hardware
Q2. Fill in the blanks-
i. The binary system uses the symbols…………..and…………..
ii. A unit of eight bit memory cell groups is called a………….
iii. RAM stands for………………….
iv. A KB in computer terminology is equal to ………….bytes.
v. Internal storage is also called main…………….
Q3. What are the two types of computer memory?
Q4. Name any four input devices?
Q5. What is the function of memory? What are its measuring units?
Q6. Describe types of hardware used for output. Name two most common output devices.
Q7. Draw any two input, output and storage devices.
Sadhu singh
(T.GT)
Computer Science

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