Veanta Let's Log in Computer-2 Final (2078)

vedanta

Log inLet’s

(A Course in Computer Science)

2Book

Sunil Kumar Gharti Authors

Sushil Upreti

Vedanta Publication (P) Ltd.

Vanasthali, Kathmandu, Nepal
+977-01-4982404, 01-4962082
[email protected]
www.vedantapublication.com.np

vedanta

Log inLet’s

(A course in Computer Science)

2Book

Authors

Sunil Kumar Gharti and Sushil Upreti

All rights reserved. No part of this publication may
be reproduced, copied or transmitted in any way,
without the prior written permission of the publisher.

© Vedanta Publication (P) Ltd.

First Edition: B.S. 2077 (2020 A. D.)
Second Edition: B.S. 2078 (2021 A. D.)

Layout and Design
Pradeep Kandel
Printed in Nepal

Published by:
Vedanta Publication (P) Ltd.
Vanasthali, Kathmandu, Nepal
+977-01-4982404, 01-4962082
[email protected]
www.vedantapublication.com.np

PREFACE

This is the age of information. Information Technology has undoubtedly invaded all
walks of life to such an extent that computer and information literacy has become the
fundamental part of our daily activities. Computer Science is now an essential addition
to the school curriculum at all levels.

Vedanta Let's Log in (A course in Computer Science) is a series of ten books on
Computer Science for basic and secondary level students, designed for the need of new
generation to help acquire knowledge on the theory, application and programming
aspects of computing. This series is based on the new syllabus of Computer Science,
designed and approved as per the curriculum prescribed by Curriculum Development
Center, Ministry of Education, Government of Nepal.

The series covers the history of computer, its accessories, applications and programming
in LOGO and QBASIC in a step-by-step and graded manner following logical and
scienti ic approach. Concept of graphic and web design is also illustrated with many
practical examples. This series not only assists the students and the teachers in the
class but also incorporates latest information and developments in IT with the present
need of the students in Nepal. It also provides other enthusiasts and learners with the
skill and knowledge to cope up with the growing demand of IT skills in market and
daily life.

We earnestly hope that the students would ind the journey through this series an
enjoyable experience and gain a sound working knowledge on the basic aspects of
computing and information technology.

As far as possible, we have sincerely put in our efforts to make the book error free.
However, there is always scope for improvement. Constructive criticism and feedback
are always welcome.

Authors

Contents Page No.

Unit Topics 5
11
1. More about Computers 18
2. How does Computer Work? 27
3. Uses of Computer in Our Daily Life 37
4. Handling Mouse 47
5. More about Keyboard 55
6. Start and Shut Down a Computer 61
7. Computers and Health 76
8. MS - Paint 88
9. Drawing in Tux Paint 98
10. Notepad 101
104
Test Paper I 107
Test Paper II
Test Paper III
Test Paper IV

Lesson

1 More About Computers

Do you know why we use this machine?

This machine is a computer. It makes our works easier and
faster.

Computer – The Smartest Machine

Main features of a computer.
. Computer works on electricity.
. Computer is an electronic device.
. Computer works at a very high speed.
. Computer does not make any mistakes.
. Computer makes our work easier.
. ŽŵƉƵƚĞƌ ŶĞǀĞƌ ŐĞƚƐ ƟƌĞĚ Žƌ ďŽƌĞĚ͘

Computer is a useful machine. It does our works quickly and
easily. We can use computers at many places such as schools,
ŽĸĐĞƐ͕ ŚŽƚĞůƐ͕ ŚŽƐƉŝƚĂůƐ ĂŶĚ ƐŚŽƉƐ͘

5 vedanta Let's Log in (A course in Computer Science) 2

ŝīĞƌĞŶƚ ƚLJƉĞƐ ŽĨ ŽŵƉƵƚĞƌ

Desktop Computer
It is the most commonly

ƵƐĞĚ ĐŽŵƉƵƚĞƌ ŝŶ ĚŝīĞƌĞŶƚ

places. It is placed on a
desk. So, it is called Desktop
computer.

Laptop Computer
Laptop is smaller than desktop
computer. We can place it on
our lap. So, it is called Laptop
Computer. We can carry
Laptop Computer easily from
one place to another.

Tablet
dĂďůĞƚ ŝƐ ƐŵĂůůĞƌ ƚŚĂŶ >ĂƉƚŽƉ͘ tĞ
ĐĂŶ ĚŽ ŵĂŶLJ ƚŚŝŶŐƐ ŽŶ Ă dĂďůĞƚ͘
We can as surf internet, send
e-mail, and type documents on
dĂďůĞƚ͘

Smartphone
Smartphone is the smallest computer and works on
ďĂƩĞƌLJ͘ /ƚ ŝƐ Ă ǀĞƌLJ ŚĂŶĚLJ ĚĞǀŝĐĞ͘ >ŝŬĞ ƚĂďůĞƚƐ͕ ǁĞ
can do many things from smart phone also. We can
surf internet, send emails, and read news on it.

vedanta Let's Log in (A course in Computer Science) 2 6

Main Points to Remember

- Computer is an electronic device.
- Computer makes our work easier and faster.
- ŽŵƉƵƚĞƌ ŶĞǀĞƌ ŐĞƚƐ ƟƌĞĚ Žƌ ďŽƌĞĚ͘
- Computer never makes mistakes.
- ŝīĞƌĞŶƚ ƚLJƉĞƐ ŽĨ ĐŽŵƉƵƚĞƌƐ ĂƌĞ ĚĞƐŬƚŽƉ͕ ůĂƉƚŽƉ͕ ƚĂďůĞƚ͕

and smartphone.

EXERCISE

A. Complete the crossword puzzle with the help of the given
clues.

12

3

4

5

ACROSS 6

1 The smartest machine.

4 Computer with the smallest size.

ϱ ŽŵƉƵƚĞƌ ƚŚĂƚ ĐĂŶ ďĞ ƉůĂĐĞĚ ŽŶ Ă ĚĞƐŬ͘

ϲ ŽŵƉƵƚĞƌ ƚŚĂƚ ĐĂŶ ďĞ ĐĂƌƌŝĞĚ ĞĂƐŝůLJ͘

DOWN
2 Machine that works on electricity.
3 Computer larger than smartphone and smaller than laptop.

7 vedanta Let's Log in (A course in Computer Science) 2

B. Fill in the blanks with the correct words given below.
΀ ĞƐŬƚŽƉ >ĂƉƚŽƉ dĂďůĞƚ ^ŵĂƌƚƉŚŽŶĞ΁

a) The ………………………. computer is the most commonly
used computer.

ďͿ ………………………. computer is easier to carry from one
place to another.

c) The smallest computer is ………………………..

d) The handheld device that can do many things is
………………………..

C. Rearrange the jumbled words and write them in the grid:

1) TSKPEOD ___ ___ ___ ___ ___ ___ ___

2) PAPLOT ___ ___ ___ ___ ___ ___

3) BLATET ___ ___ ___ ___ ___ ___

4) AMSNRTOPEH ___ ___ ___ ___ ___ ___ ___ ___ ___ ___

5) ETNLRCOCIE ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
D. Name any two features of computer.

1. _______________________________________________
2. _______________________________________________

vedanta Let's Log in (A course in Computer Science) 2 8

E. Name any three types of computer.
1. _________________________________
2. _________________________________
3. _________________________________

&͘ dŝĐŬ ;я Ϳ ƚŚĞ ĐŽƌƌĞĐƚ ĂŶƐǁĞƌ͗
1. The most commonly used computers are ……………………..
ŝ͘ ĞƐŬƚŽƉ ŝŝ͘ >ĂƉƚŽƉ ŝŝŝ͘ ^ŵĂƌƚƉŚŽŶĞ ŝǀ͘ dĂďůĞƚ
Ϯ͘ dĂďůĞƚ ǁŽƌŬƐ ŽŶ ͙͙͙͙͙͙͙͙͘͘ ͘
ŝ͘ tĂƚĞƌ ŝŝ͘ WĞƚƌŽů ŝŝŝ͘ ĂƩĞƌLJ ŝǀ͘ ŝƌ
ϯ͘ dŚĞ ƚLJƉĞ ŽĨ ĐŽŵƉƵƚĞƌ ǁŚŝĐŚ ĐĂŶ ďĞ ĐĂƌƌŝĞĚ ŝŶ Ă ƉŽĐŬĞƚ ŝƐ
called ……………………..
ŝ͘ dĂďůĞƚ ŝŝ͘ ^ŵĂƌƚƉŚŽŶĞ ŝŝŝ͘ >ĂƉƚŽƉ ŝǀ͘ ĞƐŬƚŽƉ
ϰ͘ tŚŝĐŚ ŽŶĞ ŽĨ ƚŚĞ ĨŽůůŽǁŝŶŐ ŝƐ ŶŽƚ ĐŽƌƌĞĐƚ ĂďŽƵƚ
computers?
i. Makes our work easier and faster
ii. Runs on electricity
iii. Never makes mistakes
ŝǀ͘ ^ŽŵĞƟŵĞƐ ĨĞĞůƐ ƟƌĞĚ

9 vedanta Let's Log in (A course in Computer Science) 2

Activity:

Ϳ Ƶƚ ĂŶĚ ƉĂƐƚĞ ƚŚĞ ƉŝĐƚƵƌĞƐ ŽĨ ĐŽŵƉƵƚĞƌƐ Ăƚ ĂƉƉƌŽƉƌŝĂƚĞ ƉůĂĐĞƐ
from last page ŽĨ ƚŚĞ Ŭ͘

Desktop Computer Laptop Computer

dĂďůĞƚ Smartphone

vedanta Let's Log in (A course in Computer Science) 2 10

Lesson

2 How Does a Computer
Work?

Computer is the smartest machine.
Do you know how it works?

Computer is not a single device. Therefore, it is called a
Computer System.
Computer System has two main components:
a) Hardware
ďͿ ^ŽŌǁĂƌĞ

Hardware
We can touch and see hardware. Examples of hardware
ĂƌĞ ŬĞLJďŽĂƌĚ͕ ŵŽƵƐĞ͕ ŵŽŶŝƚŽƌ͕ ĞƚĐ͘

^ŽŌǁĂƌĞ
tĞ ĐĂŶŶŽƚ ƚŽƵĐŚ ĂŶĚ ƐĞĞ ƐŽŌǁĂƌĞ ŽƵƚƐŝĚĞ͘ /ƚ ŝƐ ŝŶƐƚĂůůĞĚ
ŝŶ ƚŚĞ ĐŽŵƉƵƚĞƌ ƐLJƐƚĞŵ͘ džĂŵƉůĞƐ ŽĨ ƐŽŌǁĂƌĞ ĂƌĞ
MS-windows, Notepad, Tux Paint, MS-Paint, etc.

11 vedanta Let's Log in (A course in Computer Science) 2

ŝīĞƌĞŶƚ hŶŝƚƐ ŽĨ ŽŵƉƵƚĞƌ ^LJƐƚĞŵ

Computer System has four units. These units do our work
ƚŽŐĞƚŚĞƌ͘ ŝīĞƌĞŶƚ ƵŶŝƚƐ ĂƌĞ͗
ŝͿ /ŶƉƵƚ hŶŝƚ

From input unit, we give data
or command to the computer.
džĂŵƉůĞƐ͗ <ĞLJďŽĂƌĚ ĂŶĚ DŽƵƐĞ

ŝŝͿ WƌŽĐĞƐƐŝŶŐ hŶŝƚ

This unit actually does our work.
Example: Wh (Central Processing Unit)

ŝŝŝͿ KƵƚƉƵƚ hŶŝƚ

This unit gives the result to us.
Examples: Monitor and Printer

ŝǀͿ ^ƚŽƌĂŐĞ hŶŝƚ

We store our data in storage unit.
Examples: Pen Drive and Hard Disk.

vedanta Let's Log in (A course in Computer Science) 2 12

Computer is a useful device. We use
ĐŽŵƉƵƚĞƌ ĨŽƌ ĚŝīĞƌĞŶƚ ŬŝŶĚƐ ŽĨ ĐĂůĐƵůĂƟŽŶ͘
ZĞŵĞŵďĞƌ͕ ĐŽŵƉƵƚĞƌ ĐĂŶ ŽŶůLJ ǁŽƌŬ ƚŚĞ
ŝŶƐƚƌƵĐƟŽŶƐ ŐŝǀĞŶ ƚŽ ŝƚ͘ tĞ ŶĞĞĚ ƚŽ ŐŝǀĞ
ƉƌŽƉĞƌ ŝŶƐƚƌƵĐƟŽŶƐ ƚŽ ƚŚĞ ĐŽŵƉƵƚĞƌ͘ dŚŝƐ
is called data input. The working system of
ĐŽŵƉƵƚĞƌ ŝƐ ƐŝŵŝůĂƌ ƚŽ ŽƵƌ ďƌĂŝŶ͘ ŽŵƉƵƚĞƌ
ĚŽĞƐ ŝƚƐ ĐĂůĐƵůĂƟŽŶ ŝŶ ƚŚƌĞĞ ƐƚĞƉƐ͗

Let us take an example of Fruit Juicer.

WƌŽĐĞƐƐ Input Output
Step 2 Step 1 Step 3

In the same way, let us see how computer works:

10, 5, × 10 × 5 50

ĂƚĂ ĂŶĚ /ŶƐƚƌƵĐƟŽŶ ŽŵƉƵƚĞƌ ĚŽŝŶŐ ĐĂůĐƵůĂƟŽŶ Result

13 vedanta Let's Log in (A course in Computer Science) 2

Main Points to Remember

- ,ĂƌĚǁĂƌĞ ĂŶĚ ^ŽŌǁĂƌĞ ĂƌĞ ƚǁŽ ŵĂŝŶ ĐŽŵƉŽŶĞŶƚƐ ŽĨ
computer system.

- Computer system has four units.
- We give data or command to the computer from input

unit.
- Processing unit actually does our work.
- Output unit gives result to us.
- We store our data in storage unit.
- Computer performs its work in three steps.

EXERCISE

A. Complete the crossword puzzle with the help of the given
clues.
ACROSS
1) This unit actually does our work.
3) We cannot touch and see the components.
ϱͿ Ŷ ŝŶƉƵƚ ĚĞǀŝĐĞ͘
7) The unit from which we give data to the computer.

DOWN
2) We cannot touch and see the component.
4) The unit where we store our data.
6) The unit that gives result to us.

vedanta Let's Log in (A course in Computer Science) 2 14

12

3 4
6
5
7

B. Fill in the blanks with the correct words given below.
΀^ƚŽƌĂŐĞ /ŶƉƵƚ WƌŽĐĞƐƐŝŶŐ KƵƚƉƵƚ΁
1) We store our data in ………………………. unit.
2) Computer gives result from ………………………. unit.
3) We give data to the computer from ……………………….
unit.
4) ͙͙͙͙͙͙͙͙͙͘ ƵŶŝƚ ĚŽĞƐ ĐĂůĐƵůĂƟŽŶ͘

15 vedanta Let's Log in (A course in Computer Science) 2

C. Rearrange the jumbled words and write them in the grid:

1) OTTPUU ___ ___ ___ ___ ___ ___

2) TUINP ___ ___ ___ ___ ___

3) TSOERGA ___ ___ ___ ___ ___ ___ ___

4) TAAD ___ ___ ___ ___

5) LERTSU ___ ___ ___ ___ ___ ___

6) ORCPSESGNI ___ ___ ___ ___ ___ ___ ___ ___ ___ ___

7) WHARREAD ___ ___ ___ ___ ___ ___ ___ ___

8) WSEOFART ___ ___ ___ ___ ___ ___ ___ ___

D. Name the two main components of computer system.
1. _______________________________
2. _______________________________

E. Name the four units of computer system.
1. _________________________________
2. _________________________________
3. _________________________________
4. _________________________________

&͘ dŝĐŬ ;я Ϳ ƚŚĞ ĐŽƌƌĞĐƚ ĂŶƐǁĞƌ͗
1) Which is the output device?

i. <ĞLJďŽĂƌĚ ŝŝ͘ DŽƵƐĞ ŝŝŝ͘ WĞŶĚƌŝǀĞ ŝǀ͘ DŽŶŝƚŽƌ

vedanta Let's Log in (A course in Computer Science) 2 16

2) Which is the input device?
i. Printer ii. Harddisk iii. Monitor iv. Mouse

3) Which one is not hardware?
i. EŽƚĞƉĂĚ ŝŝ͘ DŽƵƐĞ ŝŝŝ͘ <ĞLJďŽĂƌĚ ŝǀ͘ DŽŶŝƚŽƌ

4) tŚŝĐŚ ŽŶĞ ŝƐ ŶŽƚ ƐŽŌǁĂƌĞ͍
ŝ͘ <ĞLJďŽĂƌĚ ŝŝ͘ D^ͲWĂŝŶƚ ŝŝŝ͘ dƵdž WĂŝŶƚ ŝǀ͘ EŽƚĞƉĂĚ

5) Computer performs its work in …………………. steps.
i. ƚǁŽ ŝŝ͘ ƚŚƌĞĞ ŝŝŝ͘ ĨŽƵƌ ŝǀ͘ ĮǀĞ

Lab ActivitY

ZƵŶ ĂůĐƵůĂƚŽƌ ĂƉƉůŝĐĂƟŽŶ ĂŶĚ ĚŽ ƐŽŵĞ ŵĂƚŚĞŵĂƟĐĂů ĐĂůĐƵůĂƟŽŶƐ͘

17 vedanta Let's Log in (A course in Computer Science) 2

Lesson

3 Uses of Computer in
our Daily Life

Computer is a ǀĞƌƐĂƟůĞ ŵĂĐŚŝŶĞ͘ sĞƌƐĂƟůĞ ŵĞĂŶƐ ĂďůĞ ƚŽ ĚŽ
ŵĂŶLJ ĚŝīĞƌĞŶƚ ƚŚŝŶŐƐ͘ /ƚ ŝƐ ƵƐĞĚ ďLJ ĚŝīĞƌĞŶƚ ƉĞŽƉůĞ Ăƚ ĚŝīĞƌĞŶƚ
ƉůĂĐĞƐ ŝŶ ŽƵƌ ĚĂŝůLJ ůŝĨĞ͘ /ƚ ĐĂŶ ĚŽ Ă ǀĂƌŝĞƚLJ ŽĨ ũŽďƐ͘

Let us have a look in some areas where we commonly use
computers.

In Schools

9 dŽ ůĞĂƌŶ ĚŝīĞƌĞŶƚ ƐƵďũĞĐƚƐ͘
9 dŽ ƉƌĞƉĂƌĞ ĂŶĚ ƐĞŶĚ ŶŽƟĐĞƐ͘
9 To prepare students’ mark sheets.
9 To keep record of students’ fees and teachers’ salary.
9 dŽ ŬĞĞƉ ƌĞĐŽƌĚ ŽĨ ŬƐ ŝŶ ƚŚĞ ůŝďƌĂƌLJ͘

vedanta Let's Log in (A course in Computer Science) 2 18

/Ŷ KĸĐĞƐ

9 dŽ ŵĂŬĞ ůĞƩĞƌƐ͘
9 To send e-mails.
9 To keep records of income and expenses.
9 dŽ ŬĞĞƉ ƌĞĐŽƌĚƐ ŽĨ ƐƚĂī͘

In Banks

19 vedanta Let's Log in (A course in Computer Science) 2

9 To keep records of account holders.
9 dŽ ƉƌŝŶƚ ĐŚĞƋƵĞ ďŽŽŬƐ͘
9 To deposit and withdraw money.

In Hospitals

9 dŽ ŬĞĞƉ ƌĞĐŽƌĚƐ ŽĨ ƉĂƟĞŶƚƐ͘
9 dŽ ƉƌĞƉĂƌĞ ďŝůůƐ͘
9 dŽ ƚĞƐƚ ĚŝīĞƌĞŶƚ ĚŝƐĞĂƐĞƐ͘

At Home

vedanta Let's Log in (A course in Computer Science) 2 20

9 To learn new things.
9 To play games.
9 To listen to music and watch movies.
9 dŽ ƚĂůŬ ǁŝƚŚ ĨƌŝĞŶĚƐ ĂŶĚ ƌĞůĂƟǀĞƐ͘
9 dŽ ŐĞƚ ŝŶĨŽƌŵĂƟŽŶ ŽŶ ĚŝīĞƌĞŶƚ ƚŽƉŝĐƐ͘
9 To prepare project reports.

In Departmental Store and Shops

9 dŽ ƉƌĞƉĂƌĞ ĂŶĚ ƉƌŝŶƚ ďŝůůƐ͘
9 To keep records of daily sales.
9 dŽ ŬĞĞƉ ƌĞĐŽƌĚƐ ŽĨ ĚŝīĞƌĞŶƚ ŝƚĞŵƐ͘

21 vedanta Let's Log in (A course in Computer Science) 2

For Entertainment

9 dŽ ĐƌĞĂƚĞ ƐƉĞĐŝĂů ĞīĞĐƚƐ ŝŶ ŵŽǀŝĞƐ͘
9 To make cartoon movies.
9 dŽ ĐƌĞĂƚĞ ďĂĐŬŐƌŽƵŶĚ ŵƵƐŝĐ ĨŽƌ ŵŽǀŝĞƐ͘
9 dŽ ŵĂŬĞ ĚŝīĞƌĞŶƚ ĐŽŵƉƵƚĞƌ ŐĂŵĞƐ͘

In Hotels

9 dŽ Ŭ ŚŽƚĞů ƌŽŽŵ͘
9 dŽ ƉƌĞƉĂƌĞ ďŝůůƐ͘
9 To keep records of guests.
9 dŽ ƉƌĞƉĂƌĞ ŽĸĐŝĂů ůĞƩĞƌ͘

vedanta Let's Log in (A course in Computer Science) 2 22

9 To keep records of food and other items.

Main Points to Remember

- ŽŵƉƵƚĞƌ ŝƐ Ă ǀĞƌƐĂƟůĞ ŵĂĐŚŝŶĞ͘
- Computer is used everywhere in our daily life, such as:

x Schools
x KĸĐĞƐ
x Banks
x Hospitals
x Home
x Departmental Store and Shops
x Entertainment
x Hotels

23 vedanta Let's Log in (A course in Computer Science) 2

EXERCISE

͘ ŽŵƉůĞƚĞ ƚŚĞ ĐƌŽƐƐǁŽƌĚ ŐŝǀĞŶ ďĞůŽǁ ďLJ ǁƌŝƟŶŐ ƚŚĞ ŶĂŵĞ ŽĨ
places where computer is used.

ACROSS
1 To keep record of daily sales
2 To keep records of food
ϳ dŽ ŬĞĞƉ ƌĞĐŽƌĚƐ ŽĨ ƉĂƟĞŶƚƐ

DOWN
3 To play games
4 To prepare mark sheets
ϱ dŽ ŵĂŬĞ ůĞƩĞƌƐ
6 To keep records of account holders

3

1

4 5
2

6

7

vedanta Let's Log in (A course in Computer Science) 2 24

͘ ,ĞƌĞ ĂƌĞ ƐŽŵĞ ƉůĂĐĞƐ ǁŚĞƌĞ ĐŽŵƉƵƚĞƌƐ ĂƌĞ ƵƐĞĚ͘ /ĚĞŶƟĨLJ
the picture and write the right alphabet in the box.

Ă͘ ^ĐŚŽŽů ď͘ ŝƌƉŽƌƚ Đ͘ ,ŽƐƉŝƚĂů Ě͘ ^ŚŽƉ
e. Entertainment f. Bank g. Home

25 vedanta Let's Log in (A course in Computer Science) 2

C. Match the following: Group “B”
Group “A” ;ĂͿ dŽ ůĞĂƌŶ ŶĞǁ ƚŚŝŶŐƐ
;ďͿ dŽ ŬĞĞƉ ƌĞĐŽƌĚ ŽĨ ŐƵĞƐƚƐ
ϭ͘ KĸĐĞ (c) To make cartoon movies
Ϯ͘ ĂŶŬ (d) To send e-mails
(e) To deposit money
3. Hotels
4. Home
5.Entertainment

͘ ZĞĂƌƌĂŶŐĞ ƚŚĞ ũƵŵďůĞĚ ǁŽƌĚƐ ƌĞůĂƚĞĚ ǁŝƚŚ ĚŝīĞƌĞŶƚ ƉůĂĐĞƐ
where computer is used and write them in the grid:

ϭ͘ < E ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ

Ϯ͘ Kd^/> W, ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ

3. THLOE ___ ___ ___ ___ ___

4. CIOFEF ___ ___ ___ ___ ___ ___

5. OHEM ___ ___ ___ ___

6. OPSH ___ ___ ___ ___

Activity

sŝƐŝƚ ƚŚĞ ĚŝīĞƌĞŶƚ ƉůĂĐĞƐ ŽĨ LJŽƵƌ ƐĐŚŽŽů ůŝŬĞ ĂĐĐŽƵŶƚ ƐĞĐƟŽŶ͕
ůŝďƌĂƌLJ͕ ĂĚŵŝŶŝƐƚƌĂƟŽŶ ĂŶĚ ůĂďƐ͕ ĂŶĚ ĚŝƐĐƵƐƐ ŚŽǁ ĐŽŵƉƵƚĞƌƐ ĂƌĞ
used in those places.

vedanta Let's Log in (A course in Computer Science) 2 26

Lesson

4 Handling a Mouse

Computer Mouse is an input device. With mouse
ƉŽŝŶƚĞƌ͕ ǁĞ ƐĞůĞĐƚ ƚŚŝŶŐƐ ĂŶĚ ŐŝǀĞ ŝŶƐƚƌƵĐƟŽŶ͘ /ƚ
is used for ƐĞůĞĐƟŶŐ ŝƚĞŵƐ͕ ĚƌĂǁŝŶŐƐ ĮŐƵƌĞƐ͕ and
playing games.
zŽƵ ŚĂǀĞ ĂůƌĞĂĚLJ ůĞĂƌŶƚ ŝŶ 'ƌĂĚĞ / ĂďŽƵƚ ŚŽǁ ƚŽ
hold mouse, Right?

Scroll wheel

>ĞŌ ďƵƩŽŶ ZŝŐŚƚ ďƵƩŽŶ
/ŶĚĞdž ĮŶŐĞƌ DŝĚĚůĞ ĮŶŐĞƌ

27 vedanta Let's Log in (A course in Computer Science) 2

Types of Mouse

ϭ͘ dǁŽͲďƵƩŽŶ ŵŽƵƐĞ

/ƚ ŚĂƐ ŽŶůLJ ƚǁŽ ďƵƩŽŶƐ͗ ůĞŌ ďƵƩŽŶ ĂŶĚ ƌŝŐŚƚ ďƵƩŽŶ͘

2. dŚƌĞĞͲďƵƩŽŶ ŵŽƵƐĞ

/ƚ ŚĂƐ ƚŚƌĞĞ ďƵƩŽŶƐ͗ ůĞŌ ďƵƩŽŶ͕ ŵŝĚĚůĞ ďƵƩŽŶ͕ ĂŶĚ ƌŝŐŚƚ
ďƵƩŽŶ͘

dǁŽͲďƵƩŽŶ DŽƵƐĞ dŚƌĞĞͲďƵƩŽŶ DŽƵƐĞ

ZŝŐŚƚ ƵƩŽŶ ZŝŐŚƚ ƵƩŽŶ

>ĞŌ ƵƩŽŶ DŝĚĚůĞ ƵƩŽŶ >ĞŌ ƵƩŽŶ

3. Ball Mouse

/ƚ ŚĂƐ ŽŶĞ ďĂůů ŽŶ ŝƚƐ ďĂĐŬ ƚŽ ĐŽŶƚƌŽů ƚŚĞ ŵŽƵƐĞ

cursor. Ball

Backside of Ball Mouse

vedanta Let's Log in (A course in Computer Science) 2 28

Note:

dŚĞƐĞ dǁŽͲďƵƩŽŶ ŵŽƵƐĞ ĂŶĚ dŚƌĞĞͲ ďƵƩŽŶ
ŵŽƵƐĞ ŚĂǀĞ Ă ďĂůů ŽŶ ƚŚĞŝƌ ďĂĐŬ͘ tĞ ĚŽ ŶŽƚ
use them nowadays.

4. Scroll Mouse

/ƚ ŚĂƐ ƚǁŽ ďƵƩŽŶƐ͗ ůĞŌ ďƵƩŽŶ ĂŶĚ ƌŝŐŚƚ ďƵƩŽŶ ǁŝƚŚ Ă scroll
wheel in the middle.

>ĞŌ ƵƩŽŶ Scroll Wheel

ZŝŐŚƚ ƵƩŽŶ Scroll Mouse

What do you do with this Scroll Wheel?
You can use this Scroll Wheel to scroll or move the page up and
ĚŽǁŶ͘ zŽƵ ƐĐƌŽůů ƚŚƌŽƵŐŚ Ă ƉĂŐĞ ƚŽ ƐĞĞ ƉĂƌƚƐ ƚŚĂƚ ĚŽ ŶŽƚ Įƚ ŽŶ
the screen. Scrolling means moving up and down through a
page. The scroll mouse is in use nowadays.

29 vedanta Let's Log in (A course in Computer Science) 2

ϱ͘ KƉƟĐĂů DŽƵƐĞ

dŚŝƐ ŵŽƵƐĞ ƵƐĞƐ ůŝŐŚƚ ŝŶƐƚĞĂĚ ŽĨ ďĂůů ƚŽ ƚƌĂĐŬ ƚŚĞ ŵŽǀĞŵĞŶƚ ŽĨ
the cursor.

LED Light

KƉƟĐĂů DŽƵƐĞ

6. Wireless Mouse

dŚŝƐ ŝƐ ĂůƐŽ ĂŶ ŽƉƟĐĂů ŵŽƵƐĞ ďƵƚ ŝƚ
does not have wire to connect to
CPU. It uses wireless signal similar
to remote control of TV to control
the mouse cursor.

Wireless Mouse

dŚĞ ŽŶůLJ ĚŝīĞƌĞŶĐĞ ďĞƚǁĞĞŶ ƚŚĞ ǁŝƌĞĚ ĂŶĚ ǁŝƌĞůĞƐƐ ŵŽƵƐĞ ŝƐ
that wireless mouse does not have wire.
Wireless mouse also has a scroll wheel and it uses light to control
the cursor.

vedanta Let's Log in (A course in Computer Science) 2 30

Handling a Mouse

/Ŷ ƚŚĞ ƉƌĞǀŝŽƵƐ ĐůĂƐƐ͕ LJŽƵ ŚĂǀĞ ĂůƌĞĂĚLJ ŬŶŽǁŶ ĂďŽƵƚ

DŽƵƐĞ WŽŝŶƚĞƌ
ƐůĂŶƟŶŐ ĂƌƌŽǁ LJŽƵ ƐĞĞ ŽŶ ƚŚĞ ŵŽŶŝƚŽƌ͘

Single Click
WƌĞƐƐ ŽŶ ƚŚĞ ůĞŌ ďƵƩŽŶ ŽĨ LJŽƵƌ ŵŽƵƐĞ͘

Double Click
WƌĞƐƐ ŽŶ ƚŚĞ ůĞŌ ďƵƩŽŶ ƚǁŝĐĞ ƋƵŝĐŬůLJ͘

Right Click
WƌĞƐƐ ŽŶ ƚŚĞ ƌŝŐŚƚ ďƵƩŽŶ ŽĨ LJŽƵƌ ŵŽƵƐĞ͘

DŽƌĞ ĐƟǀŝƟĞƐ ƵƐŝŶŐ DŽƵƐĞ

Drag and Drop

tĞ ƵƐĞ ƌĂŐ ĂŶĚ ƌŽƉ ĂĐƟŽŶ ƚŽ ŵŽǀĞ ĂŶ ŝƚĞŵ ĨƌŽŵ ŽŶĞ ƉůĂĐĞ ƚŽ

another on the screen using the mouse.

Step 1: Move the

mouse pointer

over an item

that you want

to move.

Step 2: WƌĞƐƐ ƚŚĞ ůĞŌ

ďƵƩŽŶ ĂŶĚ

hold.

Step 3: Holding this

ďƵƩŽŶ͕ ŵŽǀĞ

or drag the pointer to the place where you want to place the

item.

Step 4: ZĞůĞĂƐĞ ƚŚĞ ďƵƩŽŶ͘

31 vedanta Let's Log in (A course in Computer Science) 2

Scrolling

Rolling the scroll wheel of
mouse up and down is called
scroll. Generally, we use index
ĮŶŐĞƌ ƚŽ ƐĐƌŽůů ŵŽƵƐĞ͘ tĞ ƐĐƌŽůů
mouse to see parts that do not
Įƚ ŽŶ ƚŚĞ ƐĐƌĞĞŶ͘

Main Points to Remember

- Mouse is an Input Device.

- DŽƵƐĞ ŚĂƐ ĚŝīĞƌĞŶƚ ďƵƩŽŶƐ͗ >ĞŌ ďƵƩŽŶ͕ ZŝŐŚƚ ďƵƩŽŶ
and Scroll wheel.

- We use mouse to select items, draw pictures, and play
games.

- dŚĞƌĞ ĂƌĞ ĚŝīĞƌĞŶƚ ƚLJƉĞƐ ŽĨ ŵŽƵƐĞ͗ dǁŽͲďƵƩŽŶƐ ŵŽƵƐĞ͕
dŚƌĞĞͲďƵƩŽŶƐ ŵŽƵƐĞ͕ Ăůů ŵŽƵƐĞ͕ KƉƟĐĂů ŵŽƵƐĞ͕ ĂŶĚ
wireless mouse.

- Wireless mouse does not have wire to connect to the
CPU.

- KƉƟĐĂů ŵŽƵƐĞ ƵƐĞƐ ůŝŐŚƚ ƚŽ ƚƌĂĐŬ ƚŚĞ ŵŽǀĞŵĞŶƚ ŽĨ ĐƵƌƐŽƌ͘

- DŽƵƐĞ WŽŝŶƚĞƌ ŝƐ Ă ƐůĂŶƟŶŐ ĂƌƌŽǁ ƚŚĂƚ LJŽƵ ƐĞĞ ŽŶ ƚŚĞ
monitor.

- tĞ ƵƐĞ ƌĂŐ ĂŶĚ ƌŽƉ ĂĐƟŽŶ ƚŽ ŵŽǀĞ ĂŶ ŝƚĞŵ ĨƌŽŵ ŽŶĞ
place to another on the screen using mouse.

- Rolling the scroll wheel of mouse up and down is called
scrolling.

vedanta Let's Log in (A course in Computer Science) 2 32

EXERCISE

A. Color the rectangular block that are not related to
Computer Mouse.

Drag and Drop tŝƌĞůĞƐƐ ƵƩŽŶ

KƉƟĐĂů ůŝĐŬ Wireless Mouse

KƉƟĐĂů DŽƵƐĞ Front Click

Middle Click Scrolling

B. Fill in the blanks with the correct words given below.

[Scroll Draw Light Cursor Input]

1) The mouse is an………………………. device.

2) The mouse helps us to …………………. pictures on the screen.

3) dŚĞ ƐůĂŶƟŶŐ ĂƌƌŽǁ ŽŶ ƚŚĞ ƐĐƌĞĞŶ ŝƐ ĐĂůůĞĚ ͙͙͙͙͙͙͘ ͘

4) KƉƟĐĂů ŵŽƵƐĞ ƵƐĞƐ ͙͙͙͙͙͙͙͙͙͘ ƚŽ ĐŽŶƚƌŽů ƚŚĞ ĐƵƌƐŽƌ
movement.

5) tĞ ƵƐĞ ͙͙͙͙͙͙͙͙͙͘ ǁŚĞĞů ƚŽ ƐĞĞ ƉĂƌƚƐ ƚŚĂƚ ĚŽ ŶŽƚ Įƚ
on the screen.

33 vedanta Let's Log in (A course in Computer Science) 2

C. Complete the crossword given below.
ACROSS
ϭ͘ ĐƟŽŶ ƚŽ ŵŽǀĞ ĂŶ ŝƚĞŵ ĨƌŽŵ ŽŶĞ ƉůĂĐĞ ƚŽ ĂŶŽƚŚĞƌ
ϯ͘ ƚLJƉĞ ŽĨ ŵŽƵƐĞ ƚŚĂƚ ƵƐĞƐ ůŝŐŚƚ
ϱ͘ ŵŽƵƐĞ ǁŝƚŚŽƵƚ ǁŝƌĞ
ϲ͘ WƌĞƐƐŝŶŐ ŽŶ ƚŚĞ ůĞŌ ďƵƩŽŶ
DOWN
ϭ͘ WƌĞƐƐŝŶŐ ŽŶ ƚŚĞ ůĞŌ ďƵƩŽŶ ƚǁŝĐĞ ƋƵŝĐŬůLJ
Ϯ͘ ƐůĂŶƟŶŐ ĂƌƌŽǁ
4. Rolling the scroll wheel up and down

12

3

45

6

vedanta Let's Log in (A course in Computer Science) 2 34

D. Rearrange the jumbled words related to Mouse and write
them in the grid:

1) EONPIRT ___ ___ ___ ___ ___ ___ ___

ϮͿ K/dW> ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ

3) LCORSL ___ ___ ___ ___ ___ ___

4) PTUNI ___ ___ ___ ___ ___

5) SOMEU ___ ___ ___ ___ ___

6) SCORUR ___ ___ ___ ___ ___ ___

E. Write T for the true statement and F for the false one.

ϭͿ dŚĞƌĞ ĂƌĞ ϯ ďƵƩŽŶƐ ŝŶ ŵŽƵƐĞ ŝŶ ƉĂƐƚ͘

2) Ball mouse does not have wires.

3) Drag and Drop means pressing on the
ƌŝŐŚƚ ďƵƩŽŶ ƚǁŝĐĞ͘

ϰͿ KƉƟĐĂů ŵŽƵƐĞ ƵƐĞƐ ůŝŐŚƚ ƚŽ ĐŽŶƚƌŽů ƚŚĞ ĐƵƌƐŽƌ͘

5) Mouse is an input device.
ϲͿ ^ŝŶŐůĞ ĐůŝĐŬ ƌĞĨĞƌƐ ƚŽ ƉƌĞƐƐŝŶŐ ŽŶ ƚŚĞ ůĞŌ ďƵƩŽŶ ŽŶĐĞ͘
&͘ EĂŵĞ ĂŶLJ ĨŽƵƌ ŵŽƵƐĞ ĂĐƟŽŶƐ͘
1) ___________________________
2) ___________________________
3) ___________________________
4) ___________________________

35 vedanta Let's Log in (A course in Computer Science) 2

'͘ tƌŝƚĞ ĚŽǁŶ ƚŚĞ ĚŝīĞƌĞŶĐĞ ďĞƚǁĞĞŶ ǁŝƌĞĚ ĂŶĚ ǁŝƌĞůĞƐƐ
mouse.
_________________________________________________
_________________________________________________
_________________________________________________
_________________________________________________

LAB ACTIVITIES

DŽƵƐĞ WƌĂĐƟĐĞ

1. Play the “Click and Draw” game in GCompris.

2. KƉĞŶ D^ WĂŝŶƚ ĂŶĚ ĚƌĂǁ Ă ŚŽƵƐĞ ĂŶĚ Ă ƚƌĞĞ͕ ĂŶĚ ĂƉƉůLJ ƐƵŝƚĂďůĞ
colors using a mouse.

vedanta Let's Log in (A course in Computer Science) 2 36

Lesson

5 More about Keyboard

<ĞLJďŽĂƌĚ ŝƐ Ă ĐŽŵƉƵƚĞƌ ĚĞǀŝĐĞ ǁŚŝĐŚ ǁĞ ƵƐĞ ƚŽ ƚLJƉĞ ůĞƩĞƌ͕
ŶƵŵďĞƌ͕ Žƌ ƐLJŵďŽů͘ /ƚ ĐŽŶƐŝƐƚƐ ŽĨ Ă ŶƵŵďĞƌ ŽĨ ďƵƩŽŶƐ͘ dŚĞƐĞ
ďƵƩŽŶƐ ĂƌĞ ĐĂůůĞĚ ŬĞLJƐ͘

/Ŷ ƚŚĞ ƉƌĞǀŝŽƵƐ ĐůĂƐƐ͕ LJŽƵ ŚĂǀĞ ĂůƌĞĂĚLJ ŬŶŽǁŶ ĂďŽƵƚ

Alphabet keys: They are used for typing the words and
sentences.

Number keys: dŚĞLJ ĂƌĞ ƵƐĞĚ ĨŽƌ ƚLJƉŝŶŐ ŶƵŵďĞƌƐ͘

^W Z͗ /ƚ ŝƐ ƵƐĞĚ ƚŽ ƉƵƚ ďůĂŶŬ ƐƉĂĐĞƐ ďĞƚǁĞĞŶ ǁŽƌĚƐ͘

ENTER key: It is used to move cursor to the next line while
typing.

W^ >K < ŬĞLJ͗ /ƚ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ĐĂƉŝƚĂů ůĞƩĞƌƐ͘

37 vedanta Let's Log in (A course in Computer Science) 2

Now, let’s explore some other keys of the keyboard.

&ŝŐ͘ <ĞLJďŽĂƌĚ >ĂLJŽƵƚ ǁŝƚŚ ĚŝīĞƌĞŶƚ ƐƉĞĐŝĂů ŬĞLJƐ

^,/&d <ĞLJ
dŚĞ ^ŚŝŌ ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ƐƉĞĐŝĂů ƐLJŵďŽůƐ͘ zŽƵ ĐĂŶ ƐĞĞ ƚǁŽ
ĐŚĂƌĂĐƚĞƌƐ ;ŽŶĞ ŶƵŵďĞƌ ĂŶĚ ĂŶŽƚŚĞƌ ƐLJŵďŽůͿ ŽŶ ƚŚĞ ƵƉƉĞƌ ƐŝĚĞ
of the numeric keys and some other keys. You have to press
SHIFT key to type the upper characters Ăƚ ƚŚĞ ƐĂŵĞ ƟŵĞ͘

Note:

zŽƵ ĐĂŶ ĂůƐŽ ƚLJƉĞ ƚŚĞ ĐĂƉŝƚĂů ůĞƩĞƌ ǁŝƚŚ ^,/&d ŬĞLJ н
ĂŶLJ ĂůƉŚĂďĞƚ ŬĞLJ ǁŚĞŶ W^ >K < ŝƐ Žī͘

ZZKt <ĞLJƐ UP arrow

ZZKt ŬĞLJƐ ĂƌĞ ƵƐĞĚ ƚŽ

move the cursor around

the monitor, i.e., from

ůĞŌ ƚŽ ƌŝŐŚƚͬƌŝŐŚƚ ƚŽ ůĞŌ͕ LEFT arrow RIGHT arrow
Žƌ ĨƌŽŵ ƚŽƉ ƚŽ ďŽƩŽŵͬ

ďŽƩŽŵ ƚŽ ƚŽƉ͘ DOWN arrow

vedanta Let's Log in (A course in Computer Science) 2 38

Note:

cursor ŝƐ Ă ƐŵĂůů ďůŝŶŬŝŶŐ ůŝŶĞ ƐĞĞŶ ŽŶ ƚŚĞ ŵŽŶŝƚŽƌ
ǁŚŝĐŚ ƐŚŽǁƐ ƚŚĞ ƉŽƐŝƟŽŶ ŽĨ ƚŚĞ ŶĞdžƚ ůĞƩĞƌ Žƌ ŶƵŵďĞƌ
while you type it.

<^W <ĞLJ

<^W ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ erase anything typed on the ůĞŌ ƐŝĚĞof
the cursor.

For example,

You have to correct the spelling of
͚E WW >͛ dK ͚E W >͛͘
WŽƐŝƟŽŶ ƚŚĞ ĐƵƌƐŽƌ ĂŌĞƌ ƚŚĞ ĮƌƐƚ
‘P’ using arrow keys and then press
ŽŶ ƚŚĞ <^W ŬĞLJ ƚŽ ĞƌĂƐĞ ĂŶ
extra ‘P’.

> d <ĞLJ

DELETE key is used to erase ƚŚĞ ůĞƩĞƌ ŽŶ ƚŚĞ right side of the
cursor.

For example,

You have to correct the spelling
of ‘MOUYSE’ TO ‘MOUSE’.
WŽƐŝƟŽŶ ƚŚĞ ĐƵƌƐŽƌ ďĞĨŽƌĞ ͚z͛
using arrow keys and then press
on DELETE key to erase the
ƵŶǁĂŶƚĞĚ ůĞƩĞƌ ͚z͛͘

39 vedanta Let's Log in (A course in Computer Science) 2

EhD >K < <ĞLJ

zŽƵ ŚĂǀĞ ĂůƌĞĂĚLJ ƐĞĞŶ ƚŚĞ ŶƵŵďĞƌ
keys on the right side of your
ŬĞLJďŽĂƌĚ͘ /ƚ ůŽŽŬƐ ůŝŬĞ ĐĂůĐƵůĂƚŽƌ͘ /ƚ
is called numeric pad. If you want to
ƵƐĞ ƚŚĞ ŶƵŵĞƌŝĐ ŬĞLJďŽĂƌĚ͕ ƚŚĞ EhD
>K < ŬĞLJ ƐŚŽƵůĚ ďĞ ON.

Ž LJŽƵ <ŶŽǁ͍

To use numeric keypad, you have to press
or EƵŵ >ŽĐŬ <ĞLJ to switch the Num Lock
light on. Otherwise, you can not type
ŶƵŵďĞƌƐ ĨƌŽŵ ƚŚŝƐ ŶƵŵĞƌŝĐ ŬĞLJƉĂĚ͘

Notes:

^,/&d <ĞLJ

There are two SHIFT ŬĞLJƐ ŽŶ LJŽƵƌ ŬĞLJďŽĂƌĚ ĂŶĚ ďŽƚŚ ĚŽ ƚŚĞ
same work.
,ĂǀĞ LJŽƵ ŶŽƟĐĞĚ ƚŚĞ ƚǁŽ ůĞƩĞƌƐ ŽŶ ƚŚĞ ƐĂŵĞ ŬĞLJ ŽĨ ŬĞLJďŽĂƌĚ͍
/Ĩ LJŽƵ ŚĂǀĞ ŶŽƚ ŶŽƟĐĞĚ ŝƚ͕ ƐĞĞ ƚŚĞ ƉŝĐƚƵƌĞ ďĞůŽǁ͘

Upper key

vedanta Let's Log in (A course in Computer Science) 2 Lower key
40

tŚĞŶ LJŽƵ ƉƌĞƐƐ ŽŶ ŽŶĞ ŽĨ ƚŚĞ ĂďŽǀĞ ŬĞLJƐ͕ ƚŚĞ ůŽǁĞƌ ŬĞLJ ǁŝůů ďĞ
ƐĞĞŶ ŽŶ ƚŚĞ ŵŽŶŝƚŽƌ͘ /Ĩ LJŽƵ ǁĂŶƚ ƚŽ ƚLJƉĞ ƚŚĞ ƵƉƉĞƌ ƐLJŵďŽů͕ LJŽƵ
have to press the SHIFT key along with the required key.

d <ĞLJ

You can see the TAB key on
ƚŚĞ ůĞŌ ƐŝĚĞ ŽĨ LJŽƵƌ ŬĞLJďŽĂƌĚ͘
When you press on TAB key, it
ďƌŝŶŐƐ ƚŚĞ ĐƵƌƐŽƌ ƚŽ ƚŚĞ ƌŝŐŚƚ ďLJ
many spaces.

For Example:

dLJƉĞ LJŽƵƌ ĮƌƐƚ ŶĂŵĞ ĂŶĚ ƚŚĞŶ
press on the TAB key. You will
see the cursor to the right side with some spaces. Then type
your last name.

^ <ĞLJ

You can see ESC key on the
ƵƉƉĞƌ ůĞŌ ĐŽƌŶĞƌ of your
ŬĞLJďŽĂƌĚ͘ ESC key is used to
cancel or close a menu or a
ĚŝĂůŽŐ ďŽdž͘
Example:
If you want to close this
window, press ESC key once.

41 vedanta Let's Log in (A course in Computer Science) 2

Main Points to Remember

Cursor: ďůŝŶŬŝŶŐ ůŝŶĞ ŽŶ ƚŚĞ ŵŽŶŝƚŽƌ ƚŚĂƚ ƐŚŽǁƐ ƚŚĞ
ƉŽƐŝƟŽŶ ŽĨ ƚŚĞ ŶĞdžƚ ůĞƩĞƌ Žƌ ŶƵŵďĞƌ ƚŽ ĞŶƚĞƌ͘
ƌƌŽǁ <ĞLJƐ͗
They are used for moving the cursor on the
<^W ŬĞLJ͗ monitor.

DELETE key: /ƚ ŝƐ ƵƐĞĚ ƚŽ ĞƌĂƐĞ ĂŶLJƚŚŝŶŐ ƚLJƉĞĚ ŽŶ ƚŚĞ ůĞŌ ƐŝĚĞ
of the cursor.
W^ >K < ŬĞLJ͗
EhD >K < ŬĞLJ͗ It is used to erase anything typed on the right
side of the cursor.
TAB key:
/ƚ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ W/d > ůĞƩĞƌƐ͘
ESC key:
SHIFT key: /ƚ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ŶƵŵďĞƌƐ ƵƐŝŶŐ ƚŚĞ ŶƵŵĞƌŝĐ
> d <ĞLJ͗ keypad.
<^W <ĞLJ͗
ZZKt <ĞLJƐ͗ /ƚ ŝƐ ƵƐĞĚ ƚŽ ŵŽǀĞ ƚŚĞ ĐƵƌƐŽƌ ƚŽ ƚŚĞ ƌŝŐŚƚ ďLJ ŵĂŶLJ
spaces.
^,/&d <ĞLJ͗
/ƚ ŝƐ ƵƐĞĚ ƚŽ ĐĂŶĐĞů Žƌ ĐůŽƐĞ Ă ŵĞŶƵ Žƌ ĚŝĂůŽŐ ďŽdž͘

/ƚ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ƚŚĞ ƵƉƉĞƌ ƐLJŵďŽů͘

/ƚ ĞƌĂƐĞƐ ůĞƩĞƌ ƚŽ ƚŚĞ ƌŝŐŚƚ ŽĨ ƚŚĞ ĐƵƌƐŽƌ͘

/ƚ ĞƌĂƐĞƐ ůĞƩĞƌ ƚŽ ƚŚĞ ůĞŌ ŽĨ ƚŚĞ ĐƵƌƐŽƌ͘

They are used to move the cursor in UP, DOWN,
> &d͕ ĂŶĚ Z/',d ĚŝƌĞĐƟŽŶƐ͘

/ƚ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ƐƉĞĐŝĂů ƐLJŵďŽůƐ͘

vedanta Let's Log in (A course in Computer Science) 2 42

EXERCISE

͘ ŽůŽƌ ƚŚĞ ŬĞLJďŽĂƌĚ ĂĐĐŽƌĚŝŶŐ ƚŽ ĐŽůŽƌ ŝŶƐƚƌƵĐƟŽŶ ŐŝǀĞŶ ďĞůŽǁ͗
ϭ͘ d ŬĞLJ ʹ ZĞĚ Ϯ͘ ^ ŬĞLJ ʹ ůƵĞ ϯ͘ ^,/&d ŬĞLJƐ ʹ KƌĂŶŐĞ

ϰ͘ > d ŬĞLJ ʹ zĞůůŽǁ ϱ͘ W^ >K < ŬĞLJ ʹ WƵƌƉůĞ
ϲ͘ ƌƌŽǁ ŬĞLJƐ ʹ ƌŽǁŶ ϳ͘ EhD >K < ŬĞLJ ʹ ^ŬLJ ůƵĞ

B. Fill in the blanks with the correct words given below.
; ZZKt ŬĞLJ W^ >K < d ^ ^,/&dͿ
1) The ………………………. is used to cancel a menu or dialog
ďŽdž͘
2) The ………………………. is used to move the cursor to the
ƌŝŐŚƚ ďLJ ŵĂŶLJ ƐƉĂĐĞƐ͘
3) dŚĞ ͙͙͙͙͙͙͙͙͙͘ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ƚŚĞ ƵƉƉĞƌ ƐLJŵďŽů͘
4) The ………………………. is used for moving the cursor on
the monitor.
5) dŚĞ ͙͙͙͙͙͙͙͙͙͘ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ůĞƩĞƌ ŝŶ ĐĂƉŝƚĂů͘

43 vedanta Let's Log in (A course in Computer Science) 2

C. Complete the crossword given below.

ACROSS
2. This key is used to erase anything on the right side of

the cursor.
ϱ͘ dŚŝƐ ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ ŵŽǀĞ ƚŚĞ ĐƵƌƐŽƌ ƚŽ ƚŚĞ ƌŝŐŚƚ ďLJ ŵĂŶLJ

spaces.
ϲ͘ dŚŝƐ ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ůĞƩĞƌƐ ŝŶ ĐĂƉŝƚĂů͘

DOWN
ϭ͘ dŚŝƐ ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ ƚLJƉĞ ŶƵŵďĞƌƐ ĨƌŽŵ ŶƵŵĞƌŝĐ ƉĂĚ͘
ϯ͘ dŚŝƐ ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ ĞƌĂƐĞ ĂŶLJƚŚŝŶŐ ŽŶ ƚŚĞ ůĞŌ ƐŝĚĞ ŽĨ ƚŚĞ

cursor.
ϰ͘ dŚŝƐ ŬĞLJ ŝƐ ƵƐĞĚ ƚŽ ĐĂŶĐĞů Žƌ ĐůŽƐĞ ƚŚĞ ĚŝĂůŽŐ ďŽdž͘

3

241

6
5

vedanta Let's Log in (A course in Computer Science) 2 44

D. Rearrange the jumbled words and write them in the grid:

1) UKMNOCL ___ ___ ___ ___ ___ ___ ___ ___

2) ORSURC ___ ___ ___ ___ ___ ___

3) IFSTH ___ ___ ___ ___ ___

4) ECS ___ ___ ___

5) EEETDL ___ ___ ___ ___ ___ ___

6) W ^ < ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ ͺͺͺ
E. Name the key used to move the cursor by many spaces.

_________________________________________________
&͘ EĂŵĞ ƚŚĞ ŬĞLJ ǁŚŝĐŚ ŝƐ ƵƐĞĚ ƚŽ ĂĐƟǀĂƚĞ ƚŚĞ ŶƵŵĞƌŝĐ ŬĞLJƉĂĚ͘

_________________________________________________
G. What will appear on the screen if you press on:

1) н ..............................

2) ..........................

45 vedanta Let's Log in (A course in Computer Science) 2

LAB ACTIVITIES

A. Type the following text on Notepad.
1. What is your name?
2. My favorite game is …………………
3. I study in class 2 (two).
ϰ͘ DLJ ŚŽƵƐĞ ŶƵŵďĞƌ ŝƐ <ŚĂͲϭϮͲd͘
5. Hello WORLD. I am here.

B. Search the word in the box from the word puzzle.

T Y R XRFEM K <^W
Q B C K SP C E SHIFT
L P B BET E T d
R R OWK E Y S R ESC
N UMB ERTK C Q ZZKt< z^
E G S S Z EEXNW
S H I F T PD D Z

vedanta Let's Log in (A course in Computer Science) 2 46

6Lesson Start and Shut Down
a Computer

Start and Shut Down a Computer

/Ŷ ƉƌĞǀŝŽƵƐ ůĞƐƐŽŶ͕ LJŽƵ ŚĂǀĞ ůĞĂƌŶƚ ĂďŽƵƚ ƚŚĞ ĚŝīĞƌĞŶƚ ƉĂƌƚƐ ŽĨ
ĐŽŵƉƵƚĞƌ ĂŶĚ ƚŚĞŝƌ ĨƵŶĐƟŽŶƐ͘ zŽƵ ĂůƐŽ ŬŶŽǁ ƚŚĂƚ Ăůů ƚŚĞ ƉĂƌƚƐ ŽĨ
ĐŽŵƉƵƚĞƌ ĂƌĞ ĐŽŶŶĞĐƚĞĚ ƚŽ ƚŚĞ hW ďLJ ǁŝƌĞƐ͘ /Ŷ ƚŚŝƐ ůĞƐƐŽŶ LJŽƵ
will learn how to switch ON and switch OFF a computer.

Hello Rina! Do you know how to start and
shut down your computer? Today, I am going
to show you how to do these things.

Steps to switch ON computer

Step 1: Switch ON the main power switch.

Step 2: Switch ON the hW^͘

47 vedanta Let's Log in (A course in Computer Science) 2

Step 3: Switch ON the Wh ďLJ ƉƌĞƐƐŝŶŐ
ƚŚĞ ƉŽǁĞƌ ďƵƩŽŶ ŽŶ ƚŚĞ Wh
casing.

Step 4: Switch ON the Monitor ďLJ
ƉƌĞƐƐŝŶŐ ƚŚĞ ƉŽǁĞƌ ďƵƩŽŶ ŽŶ
the monitor.

Now you will see the welcome screen.

Step 5: Type username and
password, if necessary.

tĂŝƚ ĨŽƌ ƐŽŵĞ ƟŵĞ͘ zŽƵ ǁŝůů ƐĞĞ ƚŚĞ
desktop where we can do our work.

If you want to use printer and speakers,
switch them ON also.
Now, your computer is ready to work.

vedanta Let's Log in (A course in Computer Science) 2 48

Ž zŽƵ <ŶŽǁ͍

dŚĞ ǁŚŽůĞ ƉƌŽĐĞƐƐ ŽĨ ƐƚĂƌƟŶŐ Ă ĐŽŵƉƵƚĞƌ ŝƐ ĐĂůůĞĚ ďŽŽƟŶŐ.
tŚĞŶ ĞůĞĐƚƌŝĐŝƚLJ ŐŽĞƐ Žī͕ hW^;hŶŝŶƚĞƌƌƵƉƟďůĞ WŽǁĞƌ

^ƵƉƉůLJͿŐŝǀĞƐ ƵƐ ĞŶŽƵŐŚ ƟŵĞ ƚŽ ƐŚƵƚ ĚŽǁŶ ƚŚĞ ĐŽŵƉƵƚĞƌ
properly.
WĂƐƐǁŽƌĚ ŚĞůƉƐ ƚŽ ƵƐĞ ƚŚĞ ĐŽŵƉƵƚĞƌ ďLJ ĂƵƚŚŽƌŝnjĞĚ ƉĞƌƐŽŶ
only.

Steps to switch OFF a computer

Step 1: ^ĂǀĞ ĂŶĚ ĐůŽƐĞ Ăůů ƚŚĞ ŽƉĞŶ ĮůĞƐ ĂŶĚ ƉƌŽŐƌĂŵƐ͘
Step 2: Click on the ǁŝŶĚŽǁ ďƵƩŽŶ . ƐƚĂƌƚ ŵĞŶƵ ĂƉƉĞĂƌƐ͘

Step 3: Move the pointer to the ^ŚƵƚĚŽǁŶ ďƵƩŽŶ and click on
it.

Step 4:WƌĞƐƐ the ƉŽǁĞƌ ďƵƩŽŶ on the monitor to switch it Žī.

49 vedanta Let's Log in (A course in Computer Science) 2

Step 5: Switch K&& hW^͘
Step 6: Switch OFF the ƉŽǁĞƌ ƐƵƉƉůLJ ďƵƩŽŶ.

Main Points to Remember

- ^ƚĂƌƟŶŐ ƚŚĞ ĐŽŵƉƵƚĞƌ ŝƐ ĐĂůůĞĚ ďŽŽƟŶŐ͘
- ^ǁŝƚĐŚŝŶŐ Žī ƚŚĞ ĐŽŵƉƵƚĞƌ ƉƌŽƉĞƌůLJ ŝƐ ĐĂůůĞĚ ƐŚƵƚ ĚŽǁŶ͘
- tĞ ƐŚŽƵůĚ ƐŚƵƚ ĚŽǁŶ ƚŚĞ ĐŽŵƉƵƚĞƌ ƉƌŽƉĞƌůLJ ĂŌĞƌ

ĐŽŵƉůĞƟŶŐ ŽƵƌ ǁŽƌŬ͘
- hW^ ;hŶŝŶƚĞƌƌƵƉƟďůĞ WŽǁĞƌ ^ƵƉƉůLJͿ ƉƌŽǀŝĚĞƐ ƵƐ

electricity to shut down the computer properly even
ĂŌĞƌ ĞůĞĐƚƌŝĐŝƚLJ ŐŽĞƐ Žī ŝŶ ƚŚĞ ŵŝĚĚůĞ ŽĨ ŽƵƌ ǁŽƌŬ͘

vedanta Let's Log in (A course in Computer Science) 2 50