Chapter 2

                                 Computer Hardware

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Exercises

1. Mark True or False:

a) RAM is a volatile memory.

Ans: True

b) Blu-ray discs can store up to 700 MB of data.

Ans: False

c) 1024 MB is equal to 1GB.

Ans: True

d) CDs are magnetic storage mediums.

Ans: False

e) Printer is an output device.

Ans: True

2. Match column A with column B:

Column A
Column B
Del Key
makes letters from uppercase to lowercase and
 from lowercase to uppercase.
Enter key
creates one space when pressed once 
between words.
Shift Key
deletes the character to the left of the 
cursor, helping to correct typing mistakes.
Esc Key
used to start a new line or confirm 
an action.
Space Key
used to remove the selected texts, 
files, or objects.
Backspace Key
used to cancel the last operation, close dialogue 
boxes, and exit screens in software applications.

Ans:

Column A

Column B

Del Key
used to remove the selected texts, 
files, or objects.
Enter key
used to start a new line or confirm 
an action.
Shift Key
makes letters from uppercase to lowercase and 
from lowercase to uppercase.
Esc Key
used to cancel the last operation, close dialogue 
boxes, and exit screens in software applications.
Space Key
creates one space when pressed once 
between words.
Backspace Key
deletes the character to the left of the 
cursor, helping to correct typing mistakes.


3. Answer the following questions:

a) Write the names of the main parts of a computer.

Ans: Monitor, CPU, Keyboard, Mouse, RAM, Hard Disk, Power Supply

b) What is the name of the hand-held pointing device that detects two-dimensional motion relative to a surface?

Ans: Mouse

c) Which input device allows us to capture audio-visuals and stream them to a computer?

Ans: Webcam

d) Which button of a Mouse is used to move the page up and down?

Ans: Scroll Wheel 

e) What is ROM? Mention its different types.

Ans: ROM (Read-Only Memory) is a non-volatile memory used to store firmware.
Types: 
PROM (Programmable ROM)
EPROM (Erasable Programmable ROM)
EEPROM (Electrically Erasable Programmable ROM)

f) What is Cache memory?

Ans: Cache memory is a small-sized high-speed memory that stores frequently used data for quick access by the processor.

g) Define Microprocessors.

Ans: A microprocessor is the central unit of a computer that performs arithmetic and logical operations. It acts as the brain of the computer.

h) Mention any two magnetic storage mediums.

Ans: Hard Disk Drive (HDD)
         Floppy Disk

(i) What is the basic difference between a DVD and a Blu-ray disc?

Ans: DVD can store up to 4.7 GB, while a Blu-ray disc can store 25 GB or more, providing better video and audio quality.


4. Find out the input devices and output devices from the box given below and make two lists.

Keyboard, Monitor, Mouse, Scanner, Speaker, Touchpad, Printer, Microphone, Webcam, Projector, Barcode reader.

Input Devices

Output Devices














Ans: 

Input Devices

Output Devices

Keyboard

Monitor

Mouse

Speaker

Scanner

Printer

Touchpad

Projector

Microphone


Webcam


Barcode reader