Vedanta Let's Log in Computer Book 1 Final (2078)

Log inLveedatn’tsa
(A Course in Computer Science)
1Book

Sunil Kumar Gharti Authors

Sushil Upreti

vedanta

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

Log inLveedatn’tsa
(A course in Computer Science)

Authors 1Book

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 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
scientific 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 find 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.
5
Unit Topics 15
1 Computer as a Machine 23
2 Parts of a Computer 31
3 Uses of a Computer 38
4 Using a Mouse 49
5 Know your Keyboard 55
6 Getting Start with Computer 61
7 Dos and Don'ts with Computer 68
8 Drawing in MS-Paint 80
9 Drawing in Tux Paint
Test Paper I, II, III and IV

Lesson

1 Computer as a Machine

Machines are man-made things. Machines make our work easy
and fast. Some examples of machines are Fan, Radio,Television,
Refrigerator, Aeroplane, Motorcycle, Clock, etc. Some
machines need electricity to work, while others do not need it.
These are some machine around us:

A television is a machine with
a screen. It shows us movies,
informative programs, news,
and sports.

A sewing machine is used to
stitch fabric and other materials
together with thread.

A refrigerator is a machine. It
keeps our food cool and fresh.

5 vedanta Let's Log in (A course in Computer Science) 1

A bicycle is a machine with
two wheels which you ride by
sitting on it and pushing two
pedals with your feet.

A crane is a lifting machine. It
is used to lift and move heavy
objects and loads.

A truck is a machine that is used to
transport goods by road.

An aeroplane is a flying machine. It
helps us to fly up in the sky.

A car is a machine with four wheels
and seats for a small number of
people.

vedanta Let's Log in (A course in Computer Science) 1 6

EXERCISE

A. Look at the following pictures. Mark with Tick  for
machine and mark with Cross  for non-machine.
1) a)

b)
2) c)



3)



4) d)

e)

5)

7 vedanta Let's Log in (A course in Computer Science) 1

Machines are very useful because:
 They make our work easy.
 They save our time.
 They work very fast.

The Smartest Machine

Have you seen this machine? Of course, YES.
What is the name of this machine?

......................................................

A computer is a smart machine. It helps us to do our works
quickly. These works include solving sum, listening to music,
playing games, watching movies, and watching cartoons.

Computer helps you to do many things.

Computer helps you to do
mathematical calculations.

vedanta Let's Log in (A course in Computer Science) 1 8

Computer helps you to listen to
music.

Computer helps you to play games.

Computer helps you to watch
cartoons and movies.

Computer helps you to draw
pictures.

9 vedanta Let's Log in (A course in Computer Science) 1

Computer helps you to type words
and sentences.

Main Points to Remember

 Machines are very useful things made by human.
 Machines make our work easier, faster and smoother.
 Machines are of two types: electronic and non-electronic.
 Computer is an electronic machine.
 Computer does many things for us.

vedanta Let's Log in (A course in Computer Science) 1 10

EXERCISE
1. Colour the circle (Green) on the correct machine types:

Electronic Non-Electronic

11 vedanta Let's Log in (A course in Computer Science) 1

2. Join the dots, complete the picture of computer, and
colour it.

3. Mark a tick (√) for the correct statement and a cross (X) for
the wrong one in the box for every sentence.

a) Machines are non-living things.

b) A computer is not a machine.

c) We can take a bath with the help of a computer.

d) We can draw pictures with the help of a computer.

e) We can play games on a computer.

vedanta Let's Log in (A course in Computer Science) 1 12

4. Tick (√) the correct answer.
a) Which of the following is a machine?
i) Door ii) Balloon iii) Doll iv) Bicycle

b) Which of the following is not a machine? iv) Car
i) Table Clock ii) Book iii) Telephone Set

c) Which of the following helps you to work fast?
i) Chair ii) Pencil iii) Fan iv) Computer

d) Which one of the following cannot be done using a computer?
i) Hair Cut ii) Listen to Music
iii) Multiply Numbers iv) Type Letters

e) Which one of the following is not true about computer?
i) Saves time ii) Works Fast
iii) Does not need electricity iv) Does not make mistake

5. Fill in the missing letters to complete the following words.
a) ___ O M ___ ___ T ___ R
b) ___ A ___ ___ I N ___

13 vedanta Let's Log in (A course in Computer Science) 1

c) M ___ ___ I C 2
d) P ___ A ___

ACTIVITIES

a) Make list of the some machines that are used at your home.

I …………………………………………………………

II …………………………………………………………

III …………………………………………………………

IV …………………………………………………………

b) Aarambha wants to use his computer. Help him to find the
way to reach the computer.

vedanta Let's Log in (A course in Computer Science) 1 14

2 Lesson

2 Parts of a Computer

Our body has different parts. Each body part has very important
work. Some parts of our body are shown below:

Hair Eye
Ear Mouth
Nose
Arm Chest

Hand

Leg Knee

Foot

15 vedanta Let's Log in (A course in Computer Science) 1

Just like our body, computer also has many parts. These parts do
the different works together.

Monitor

Keyboard CPU

Mouse

Monitor

A monitor looks like TV. It displays texts and
pictures. You can also watch movies and
cartoons, on it.

Keyboard

A keyboard has many keys on
it. It is used to type numbers
and letters. You can see on
the monitor screen what you
type from the keyboard.

Mouse

The mouse is used for pointing things, drawing
pictures, and moving the arrow on the computer
screen.
It has two or more buttons.

vedanta Let's Log in (A course in Computer Science) 1 16

CPU (Central Processing Unit)

The main section of a computer is CPU. It
stands for Central Processing Unit.
It processes all the data and instructions
given by you. It is also called the brain of
computer.

Main Points to Remember

 Computer has many parts such as monitor, keyboard, mouse,
and CPU.

 Monitor displays text and pictures.
 Keyboard is used to type letters and numbers.
 Mouse is used to point things and drawing pictures.
 CPU processes data and instructions.

17 vedanta Let's Log in (A course in Computer Science) 1

EXERCISE

1. Colour the parts of the computer:
MonitorinBlue,CPUinRed,KeyboardinGreen,andmouseinYellow.

2. Only circle the words, which are the parts of the computer.

CPU Key Rat PUC Board
Blackboard Phone Speaker
Keyboard Mouse Cupboard Cooker Pen

Cat Printer

3. Write the names of the parts shown below.

_E_B_A_D

vedanta Let's Log in (A course in Computer Science) 1 18

M_U_E

_P_

M_N_T_R

4. Can you tell me, who I am?
a) Use me to point at items shown on the monitor.
_____________________________________
b) I show pictures, text and games on my screen.
_____________________________________
c) Use me to type letters on a computer.
_____________________________________
d) I am the brain of the computer.
_____________________________________

19 vedanta Let's Log in (A course in Computer Science) 1

5. Count the number of monitors, keyboards, CPUs and mouse
devices. Then write the number in the correct box.

Monitors Mouse Keyboards CPUs

6. True or False [Write T or F in each box.]

i. The CPU is the most important section of
a computer.

ii. The Keyboard looks like a television.

vedanta Let's Log in (A course in Computer Science) 1 20

iii. The Mouse helps us to point at items.
iv. The Keyboard works like a pencil of
the computer.
v. The Mouse is also called the brain of
a computer.
7. Suniska is carrying a keyboard. She wants to connect to

with her computer. Help her to find the way to reach her
computer.



21 vedanta Let's Log in (A course in Computer Science) 1

8. Search three more computer parts from the word puzzle
below and color them.

S P R I NT E R S Z
P Q S MO N I T O R
E GX OVZ P VAL
AC P UB VOB E K
K N WS C Y L N R R
E R K E Y B OAR D
R E E GNR S Z F D

ACTIVITY

Label the following picture.

1

24

1. ....................................... 3
3. .......................................
2. .......................................
4. .......................................

vedanta Let's Log in (A course in Computer Science) 1 22

Lesson

3 Uses of Computer

Do we use computers only at home?
No, we use computers in many other places to make work easier
and faster.

In schools for teaching and learning. In departmental store for keeping
records and bills.

In banks for managing account In offices for different works.
details.

23 vedanta Let's Log in (A course in Computer Science) 1

In airports for checking the flights time. In hospital for diagnosing patients.

In film studio for editing films. In library for keeping records of
books.

Main Points to Remember

 A computer is a very useful machine.
 Computer can do many things.
 Computers are used in banks, offices, airports, hospitals,

film studio, library and many other places.
 Computers are used to keep records of various kinds of data.

vedanta Let's Log in (A course in Computer Science) 1 24

EXERCISE

1. Search five places where computers are used from the
word puzzle below and mark them.

G B AR S E R TK P
W R S C H O O L R M • SCHOOL
T A L P O A B E T T • AIRPORT
C A I R P O R T O L • HOSPITAL
H O S P I T A L K F • SHOP
N E G B A N K E X T • BANK
D B SY R VL LD Y

2. Here are some places where computers are used. Place the
number on the respective picture.

i) School ii) Bank iii) Hospital iv) Shop v) Library vi) Airport

25 vedanta Let's Log in (A course in Computer Science) 1

3. Here are some activities your friends are doing. Write
tick mark () where you think computers can be used
and cross mark (×) where you think computers cannot be
used.
a. Your friend Kritika is climbing a tree. Can
computer help her to climb the tree?

b. Naresh wants to listen to a new Nepali
Song. Can he use computer to listen to the
song?

vedanta Let's Log in (A course in Computer Science) 1 26

c. Suniska wants to write a letter to her class
teacher. Can computer be useful to write a
letter?

d. Kamal is washing his hands. Can computer
help him to wash his hand?

e. Arshia wants to add few numbers. Can
computer help her for such a calculation?

f. Samragyi is feeling bored. She wants to
play games. Can she use computer to play
games?

g. Bikash is wearing his shoes. Can computer
help him to wear shoes?

h. Mishika has to draw a picture of flower. Can
computer help her to draw the picture?

4. Collect pictures of places where computers are used and
paste them in the given boxes and name them, too.


(a) ___________________ (b) ___________________

27 vedanta Let's Log in (A course in Computer Science) 1

(c) ___________________ (d) ___________________

(e) ___________________ (f) ___________________

vedanta Let's Log in (A course in Computer Science) 1 28

5. Rearrange the jumbled letters to name the places where
computers are used.

I. OCLHOS ________________________

II. ABKN ________________________

III. IPOHSLTA ________________________

IV. ELOHT ________________________

6. Tick () the correct option:

i. In shops, computers help in

(a) sending e-mail (b) making bills

ii. In banks, computers help to

(a) make questions papers (b) count money

iii. In offices, computers help in

(a) playing games (b) typing letters

iv. In hospitals, computers help to

(a) Check patients (b) Book tickets

v. At home, computers are used to

(a) drink water (b) play games

29 vedanta Let's Log in (A course in Computer Science) 1

Lab Activity:
Request your teacher to open TuxPaint and draw a picture.

Play Games:
Request your teacher to open GCompris and play some games.

vedanta Let's Log in (A course in Computer Science) 1 30

Lesson

4 Using a Mouse

You must have seen this picture in computer. This is a Mouse.

It looks like a rat. It has a tail (wire). So, it is called a Mouse which
is connected to the computer.

A mouse is used to give instructions to the computer.
It is also an Input Device. Mouse can also be used to
draw pictures on the screen.

31 vedanta Let's Log in (A course in Computer Science) 1

The arrow on the computer monitor is called the mouse pointer.

A mouse has two or three
buttons, which help you to
click items on the screen. A
‘click’ sound is also heard
when you press a button
on the computer mouse.
This is called clicking the
mouse.

You can click both buttons but only once at a time.
We can use different types of clicks to do different
things on Computer.

Single-Click

Press the left button of your mouse once, you will
hear a ‘click’ sound. This is called ‘Single-Click’ or
simply a ‘Click’. Single-Click is used to select any item.

Double-Click

Press the left button of your mouse twice
very quickly. You will hear ‘click-click’
sound. This is called double-click. You
double-click the mouse to open an item.

Double-click on “This PC” icon to open it
as in the picture.

vedanta Let's Log in (A course in Computer Science) 1 32

Right-Click
Press the right button of your mouse once. You will again hear a
‘click’ sound. This is called “Right-click.” We press right-click on
to open pop-up menus to do different tasks.
Open Paint and right-click on the drawing area. You will see the
below pop-up menu.
The mouse also has a wheel at the centre called the scroll button.
This button helps you move up and down a page.

Scroll Button

The mouse is kept on a mouse pad. When you move the mouse
on the mouse pad, the mouse pointer also moves on the screen.
Mouse Pad
Mouse Pad is a flat surface made from rubber or plastic. It helps
to use mouse smoothly.

33 vedanta Let's Log in (A course in Computer Science) 1

Mouse Pad

Note: You can also find the mouse without a wire. It is called
wireless mouse.

Main Points to Remember

 Mouse is an Input Device.
 Mouse has different buttons. They are left, right and scroll

button.
 We use mouse to select items, draw pictures, and play

games.
 We use Mouse Pad to use mouse smoothly.
 Pressing the left button once is called single-click or simply

click.
 Pressing the left button twice very quickly is called double-

click.
 We press right-click to display pop-up menu.

vedanta Let's Log in (A course in Computer Science) 1 34

EXERCISE

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

2. Ask your teacher to help you to open Notepad using
Mouse and type your name and the name of your school.

3. Circle the words that are related to Computer Mouse.

Right Click Mouse Pad Rat Pointer
Tail Cat Double Click Left Click
Letter Pad Back Click

4. Draw a line to show the different parts of a Mouse.

Right Button Scroll Wheel

Mouse Wire Left Button

5. Colour and label the different parts of a Mouse.

35 vedanta Let's Log in (A course in Computer Science) 1

6. Manil bought a Mouse. He wants to connect it to his
computer. Help him to find the way to reach his computer.

7. I am a Mouse of your Computer. I help you to use computer.
Color the mouse on my correct tasks.

• Right Click

• Up Click

• Left Click

vedanta Let's Log in (A course in Computer Science) 1 36

• Scroll

• Type

8. Find the below words related to Mouse from the given
word puzzle below and color them.

MOUSE PAD, CLICK, BUTTON, SCROLL, CURSOR, POINTER

KASD F GC X E C
B MO U S E P A D U
UODM C L I C K R
T K HV R E N S X S
T J O Z O D T D WO
OG I S L L R F E R
NR P O I N T E R T

37 vedanta Let's Log in (A course in Computer Science) 1

Lesson

5 Know Your Keyboard

We use pencil or pen to write
on a copy or notebook.
Can we use pencil to write on
computer? No, we can’t.

How do you write on a computer?
We write on a computer by using a
keyboard.

Keys on the Keyboard

Keyboard has many buttons. These buttons are called KEYS.

We can type by pressing keys on the keyboard of a computer.

vedanta Let's Log in (A course in Computer Science) 1 38

Note:

The keys on a computer keyboard
are different from the key of locks
which you use to open the door
locks.

Before we had computer,
typewriter was used to type
documents. It has many
buttons on it. These buttons
are called keys. The keys we
press on the keyboard shows
respective letter or number on
the monitor or screen. Cursor
is a small blinking line on the
monitor.

Cursor

39 vedanta Let's Log in (A course in Computer Science) 1

Do You Know?

Christopher Sholes invented the QWERTY
Keyboard in 1868. TYPEWRITER is the
longest word that can be typed using
only the top row of keys.

ALPHABET KEYS

The alphabet keys are used for typing words and sentences. The
letters A to Z are written on these keys. In the first row, you can
see the keys QWERTY. So, it is called QWERTY keyboard.

In the above picture, only the alphabet keys are coloured.
There are usually 104 keys on a keyboard.

ACTIVITY

You have seen the figure of both keyboard and typewriter.
a. Now, Color the letters of your name.

vedanta Let's Log in (A course in Computer Science) 1 40

b. Color the alphabet keys in red.

c. Color the letters of the name of our country.

NUMBER KEYS

The number keys are used for typing
numbers. They are also called numeric keys.
Your keyboard has one set of number keys.

It is placed above the alphabet keys and another set is on the
right side of the keyboard (0-9).

41 vedanta Let's Log in (A course in Computer Science) 1

Note:

Numeric keypad can be used only when the NUM LOCK is ON.
Now, color both set of keys that form the number 1247.

Color both set of numeric keys is blue.

SPECIAL KEYS

SPACEBAR

SPACEBAR is the longest key
on the keyboard. This key is
used to type blank spaces
between two letters or words.

vedanta Let's Log in (A course in Computer Science) 1 42

ENTER KEY

The ENTER key is pressed to type from the next
line.

CAPS LOCK Key

If the CAPS LOCK is ON, then all the letters that are typed appear
in CAPITAL on the monitor.
When you press CAPS LOCK, you can see the light indicator for
CAPS LOCK.

If the CAPS LOCK is OFF, the letters that are typed appear in
small letters on the monitor.
To bring the CAPS LOCK ON you have to press once the CAPS
LOCK key. It is available on the left side of your keyboard. To turn
it OFF, you have to press the same key once again.

43 vedanta Let's Log in (A course in Computer Science) 1

Main Points to Remember

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

 Number keys: They are used for typing numbers.
 SPACEBAR: It is used to type blank spaces.
 ENTER key: It is used to type from the new line.
 CAPS LOCK: It is used to type capital letters.
 Cursor: A small blinking line on the monitor.

EXERCISE

1. Color the below keyboard according to the color code
below:
Alphabet keys – Red Number keys – Blue
ENTER keys – Green SPACEBAR – Yellow



vedanta Let's Log in (A course in Computer Science) 1 44

2. Count the number of keys of each type in the given layout of
keyboard and write in the blanks below.

i. Alphabet keys ……….. ii. SPACEBAR ………..

iii. Number keys ……….. iv. ENTER keys ………..

3. Match the following.

Column A Column B

a) i. Number key

b) ii. ENTER key

c) iii. Alphabet key

d) iv. SPACEBAR

45 vedanta Let's Log in (A course in Computer Science) 1

4. Use the correct words given below to fill in the blanks.
(Number key, Alphabet key, ENTER key, SPACEBAR)
a) Key used to type from the new line ……………………..

b) Key used to type your name ……………………..

c) Key used to type your class ……………………..

d) The longest key on the keyboard is ……………………..

5. Search for the word in the box from the below puzzle below.

AL Y R XR F E M • ENTER
S P A C EBARW • KEYBOARD
A L P H AB E T T • SPACEBAR
B R B UAT NOC • NUMBER
NUMB ER T K G • ALPHABET
E GS S ZE E X N
K E Y B OA R D D

6. Write True or False.

a) BACKSPACE key erases letter to the right of the cursor.

b) There are usually 94 keys on the keyboard.

c) When CAPS LOCK is off, letters appear in UPPERCASE
(capital).

d) A keyboard looks like a typewriter.

e) The longest key on the keyboard is ARROW key.

7. Tick the correct answer.

a. …………………. is used to write capital letters.
i. BACKSPACE Key ii. CAPS LOCK key
iii. DELETE key iv. SPACEBAR

vedanta Let's Log in (A course in Computer Science) 1 46

b. Buttons on the keyboard are called …………………. .
i. space ii. alphabet iii. key iv. Cursor

c. Number of keys usually available on keyboard is ........
........................
i. 84 ii. 94 iii. 104 iv. 100

d. The longest key of the keyboard.
i. BACKSPACE Key ii. CAPS LOCK key
iii. DELETE key iv. SPACEBAR

e. A small blinking line on the monitor is ...............................
i. key ii. space iii. cursor iv. Shift

LAB ACTIVITIES

1. Open a text editor such as Notepad and type a paragraph
about you and your family.

2. Type the text in below format in Notepad.

-------------------------------------------
@@
#
0000000
00000
000
0

-------------------------------------------

47 vedanta Let's Log in (A course in Computer Science) 1

3. Type your date of birth.

4. Type your FULL NAME in CAPITAL letters.

5. Find out the number of these keys on a keyboard in your
computer lab.

I. SHIFT
II. CAPS LOCK
III. SPACEBAR
IV. ENTER
V. ARROW KEYS

6. Color the symbols found on a keyboard in the computer of
your school's lab.

@θ ∏ ⊕

≤ %∃

) #∴ ⊥

⇒{ ? >

+∞ * =

&√ ! σ

vedanta Let's Log in (A course in Computer Science) 1 48

6Lesson Getting Start with
your Computer

Computer works on electricity like
television or fan. You might have seen
the wires from the CPU connected to
the electric socket through UPS.

UPS provides a continuous supply of the current
(electricity) to the computer for some time even
the electricity goes off. This gives you enough
time to close the application and shut down the
computer properly.
Starting your computer
Follow the steps below to switch on your Computer
Step 1: Switch on the main switch where the wires of UPS is
connected.

[Note: People do not use UPS everywhere. In this case, the wires of CPU and monitor
are connected directly to the main switch.]

49 vedanta Let's Log in (A course in Computer Science) 1

Step 2: Switch on the UPS if available.
Step 3: Switch on the CPU by pressing the power button.

Step 4: Switch on the Monitor by pressing the power button on
it.

Step 5: Wait for some time until you see the desktop.

vedanta Let's Log in (A course in Computer Science) 1 50