CBSE Class 4 Computers Worksheet

KNOW YOUR COMPUTER

1) Multiple choice questions :

(i) Plotter is a/an __________ device.
(Processing , Input , Output , Storage)
Answer.Output

(ii) A keyboard usually has ____________ keys.
(110 , 106 , 100 , 105)
Answer.105

(iii) Which of these devices is used to play games on computer?
(Scanner , Plotter , Joystick , Webcam)
Answer.Joystick

(iv) Which of these is a storage device?
(Monitor , pen drive , keyboard , speaker)
Answer.Pendrive

(v) ________ Is called the brain of a computer.
(CPU , Mouse , Keyboard , Monitor)
Answer.CPU

2) Fill in the blanks:

(i) _____ contains ALU, MU and CU.
Answer.CPU

(ii) _____ is used to read a set of lines that represents a number.
Answer.bar code reader

(iii)_____ is used for video chatting and video conferencing.
Answer.webcam

(iv)______ converts a hard copy into soft copy.
Answer.scanner

(v)_______ is used to record sound and music.
Answer.Microphone

(vi) Never pull the _____ of computer devices.
Answer.wires

3.) Write full forms :
CPU , ALU , MU , CU , DVD , CD
Answer.
CPU : Central Processing Unit
ALU : Arithmetic and Logic Unit
MU : Memory Unit
CU : Control Unit
DVD : Digital Video Disk
CD: Compact Disk

4.) Name the following:

(i) It is used to play games on computer.
Answer.Joystick

(ii) It displays the output on the screen.
Answer.Monitor

(iii) It is a synonym of rat.
Answer.Mouse

(iv) It resembles a typewriter.
Answer.Keyboard

(v) It converts hard copy into soft copy.
Answer.Scanner

(vi) It converts small soft copy into hard copy.
Answer.Printer

(vii) These are used to listen to music or sound.
Answer.Headphone

(viii) It is a storage device.
Answer.Pendrive

(ix) It converts large soft copy into hard copy.
Answer.plotter 

1) Multiple choice questions:

C. ____________________________

3. What machine is used to withdraw money in a bank? 

Fill in the Blanks :

1) _______________ is the basic storage unit of a computer.

2) RAM is a _______________ memory.

3) 1 Terabyte = _________________ .

4) ____________ is the smallest unit of a computer.

5) RAM is ______________________________________ .

6) ________________________ and _______________________ are the two types of memory .

7) 1 Byte = __________________ .

8) ____________________ and ____________________ are secondary memory.

9) A computers memory is measured in _______ and ___________ .

10) ______________ and ________________ are two types of primary memory .

New Words

INFORMATION

TIM BERNER-LEE

BROWSER

UNIFORM

RESOURCE

LOCATOR

NOTIFICATION

LARRY PAGE

SERGEY BRIN

EMOTICONS

SEARCH ENGINES

GOOGLE CHROME

ANSWER THE FOLLOWING QUESTIONS:

Question. What is Internet? Explain any two uses.
Ans: The Internet is a global (wide area) network connecting millions of computers. The Internet is often referred as the network of networks or World Wide Web (WWW).
The two uses are:
Online Banking (Net-Banking): The use of internet can also be seen in the field of banking transactions. Many banks such as HSBC, SBI, Axis Bank, HDFC Bank, etc. offers online banking facilities to its customers. They can transfer funds from one account to another using the net-banking facility.
Chatting: There are many chatting software that can be used to send and receive real-time messages over the internet. We can chat with our friend and relatives using any one of the chatting software.

Question. What is a browser? Name any two browser.
Ans: A browser is a software application used to locate, retrieve and display content on the World Wide Web, including Web Pages, images, video and other files.
Examples: Mozilla Firefox, Google Chrome.

Question. What do you mean by E-mail?
Ans: Email, short for "electronic mail," is one of the most widely used features of the Internet, along with the web. It allows you to send and receive messages to and from anyone with an email address, anywhere in the world.
An email address identifies an email box to which messages are delivered. ... An email address, such as john.smith@example.com, is made up from a local-part, the symbol @, and a domain name.

Question. What is a web page?
Ans: A web page or webpage is a document, that is viewed in an Internet browser. A web page can be accessed by entering a URL address into a browser's address bar. A web page may contain text, graphics, and hyperlinks to other web pages and files.
A web page is often used to provide information to viewers, including pictures or videos to help illustrate important topics.

Q1. Fill in the blanks:

1. _________ is the latest version of Windows.
Answer : Windows 8

2. _________ is the founder of Microsoft.
Answer : Bill Gates

3. The __________ feature allows us to turn the open Windows transparent and make the desktop visible.
Answer : aero peek

4. Windows is a ________________ User Interface (GUI).
Answer : Graphical

5. __________________ primitive erases all the procedures.
Answer : ERASE ALL

Q2. State true or false:

1. An operating system controls the overall activities of a computer.
Answer : True

2. In Windows, we can run only one program at a time.
Answer : False

3. The shortcut icon has a small jump arrow at its lower right corner.
Answer : False

Q3. Match the following:

1. PU               (a) Orders the turtle to re-appear on the screen

2. HT               (b) Turns the head of the turtle towards the left side

3. ST               (c) Orders the turtle to lift the pen up from the screen

4. HOME         (d) Orders the turtle to disappear from the screen

5. LT               (e) Brings the turtle to the centre of the screen

Answer : [3] [5] [1] [2] [4]

Q4. Write the syntax to

(a) Name or define a procedure
Answer : TO procedure name

(b) Edit a procedure
Answer : EDIT “procedure name

(c) Save a procedure
Answer : SAVE “procedure name

(d) Load or recall a procedure
Answer : LOAD “procedure name

(e) Erase a procedure
Answer : ERASE “procedure name

(f) Erase all the procedures
Answer : ERASE ALL

(g) See all the procedures
Answer : POTS

Q5. Which figure will be drawn when you give the following commands?

(a) REPEAT 360 [ FD 1 RT 1 ]
Answer : Circle

(b) REPEAT 180 [ FD 1 RT 1 ]
Answer : Semicircle

(c) REPEAT 180 [ FD 1 LT 1 ]
Answer : Semicircle

(d) REPEAT 3 [ FD 100 RT 120 ]
Answer : Triangle

(e) REPEAT 4 [ FD 100 RT 90 ]
Answer : Square

(f) REPEAT 5 [ FD 100 RT 72 ]
Answer : Pentagon

(g) REPEAT 6 [ FD 100 RT 60 ]
Answer : Hexagon

(h) REPEAT 5 [ FD 120 RT 144 ]
Answer : Star

Q6. Write the LOGO command for each of the following:

1. Add 26 and 34

2. Add 34,72 and 10

3. Subtract 56 and 45

4. Multiply 35 and 6

5. Multiply 2, 3 and 5

6. Divide 88 by 2

7. Divide 88 by 2 and find the quotient

8. Divide 88 by 2 and find the remainder

9. 23 greater than 67

10. 44 less than 66

11. Display the last word of the sentence GOD IS GREAT

12. Display the last letter of the word COMPUTER

13. Display the first word of the sentence GOD IS GREAT

14. Display the first letter of the word COMPUTER

Answer :

Q7. Identify and correct the errors of the following LOGO commands.

(a) REPEAT 3 ( FD 100 RT 120 )
Answer : REPEAT 3 [ FD 100 RT 120 ]

(b) PRINT REMINDER 45 5
Answer : PRINT REMAINDER 45 5

(c) PRNT SUM 25+6
Answer : PRINT SUM 25 6

(d) PR FIRST “GOD IS GREAT”
Answer : PR FIRST [GOD IS GREAT]

(e) PR LAST “COMPUTER”
Answer : PR LAST “COMPUTER

(f) PR [SUM 10 20 30]
Answer : PR (SUM 10 20 30)

(g) TO “SQUARE
Answer : TO SQUARE

(h) EDIT “SQUARE”
Answer : EDIT “SQUARE

(i) PRINT QUOTINT 12/3
Answer : PRINT QUOTIENT 12 3

Q8. Write the full forms for the following abbreviations

1. LOGO
Answer : Logic Oriented Graphic Oriented

2. BK
Answer : Back

3. FD
Answer : Forward

4. ST
Answer : Show Turtle

5. HT
Answer : Hide Turtle

6. PD
Answer : Pen Down

7. PU
Answer : Pen Up

8. LT
Answer : Left

9. RT
Answer : Right

10. PR
Answer : Print

11. GUI
Answer : Graphical User Interface

12. CS
Answer : Clear Screen

13. CT
Answer : Clear Text

Q9. Answer in one word or sentence:

1. What is the extension of a LOGO file?
Answer : .lgo

2. Which command is used to erase all the procedures?
Answer : ERASE ALL

3. Which primitive is used to look at the names of all the procedures defined? A
Answer : POTS

4. Which primitive is used to fill colour in the pictures?
Answer : FILL

5. In LOGO, which menu is used change the pen size and colour?
Answer : Set menu

6. In LOGO, which menu option is used to set the pen colour?
Answer : Set>Pen color option

7. In LOGO, which menu option is used to increase the size of an object ?
Answer : Zoom>In

8. Where do you type commands in LOGO?
Answer : Command Input Box

9. What is a shortcut?
Answer : Refer Page 27

10. What is an icon?
Answer : The small labeled pictures displayed on the desktop are known as icons.

Q10. Answer the following:-

1. Why do we use PRINT primitive?
Answer : Answer-Refer Page 62 or Page 56 last paragrap

2. Which are the five mathematical functions used in LOGO for doing calculations?
Answer : Answer: SUM, DIFFERENCE, PRODUCT, QUOTIENT and REMAINDER'

3. Write and explain any two features of Windows.
Answer : Answer-Refer Page 21

4. What is the use of ‘Computer’ icon?
Answer : Answer-Refer Page 27 or Page 23 1st paragraph

5. What are the parts of a procedure? Explain briefly.
Answer : Answer-Refer Page 71 or Page 64 2nd paragraph

Q11. Differentiate between each of the following :

1. CS and CT -
Answer : CS primitive is used to clear the complete picture drawn on the main screen or graphics screen. CT primitive is used to clear the text present in the Recall list box and the command in the Input box.

2. File and folder –
Answer : A folder is a collection of related information stored together. But a folder is a collection of relevant files and sub-folders.

3. First and Last primitives –
Answer : First primitive is used to print the first letter of a word or to print the first word of a sentence. Last primitive is used to print the last letter of a word or to print the last word of a sentence.

4. Quotient and Remainder function –
Answer : Quotient function divides the first input number by the second input number and gives the quotient. Remainder function divides the first input number by the second input number and displays only the remainder on the screen.

Q12. Write the Shortcut keys:

1. Save a document
Answer : Ctrl + S

2. Print a document
Answer : Ctrl + P

3. Close an application
Answer : ALT + F4

4. Open a document
Answer : Ctrl + O

5. Create a new file
Answer : Ctrl + N

6. Delete files permanently
Answer : Shift + Del

Q. A: FILL IN THE BLANKS:
1. A network is a collection of two or more computers connected to one another to share  _________ .
2.  WWW stands for __________ .
3. A _________ is a collection of web pages.
4. ___________ and ____________ are the two most popular web browsers.
5. The first page of any website is known as ____________ .

Q. B: STATE TRUE OR FALSE:
1. A web site is a special program to access information.
2. An e-mail is sent through the internet.
3. An ISP is the company that gives us access to the internet for a fee.
4. The World Wide Web is not a part of the Internet.

Q. C: MULTIPLE CHOICE QUESTIONS:

1.  ___________ is one of the most popular search engines and has been founded by Larry Page and Sergey Brin.
a. Yahoo                    b. Google                 c. Bing

2. ______ is regarded as the founder of World Wide Web.
a. Sabeer Bhatia         b. Tim Berners-Lee        c. Sergey Brin

3. ______ is a special program to open websites.
a. WWW               b. Web Browser            c. Web Page

Q.A- Multiple Choice Questions:

Q.1. Storage which stores or retains data after power off is called-
(A) Volatile storage
(B) Non-volatile storage
(C) Sequential storage
(D) Direct storage
Answer : B

Q.2. A permanent memory, which halls data and instruction for start-up the computer and does not erase data after power off.
(A) Network interface card
(B) CPU
(C) RAM
(D) ROM
Answer : D

Q.3. Which of the following memories must be refreshed many times per second?
(A) EPROM
(B) ROM
(C) Static RAM
(D) Dynamic RAM
Answer : D

Q.4.USB-type storage device is -
(A) Secondary
(B) Axillary
(C) Tertiary
(D) Primary
Answer : A

Q.5. Which device is used to back up the data?
(A) Floppy Disk
(B) Tape
(C) Network Drive.
(D) All of the above
Answer : D

Q.B - Fill in the blanks:

Q.1. A half byte is known as_ nibble _

Q.2. Main memory of computer is _Internal_

Q.3. _ ROM _ is the permanent memory built into your computer.

Q.4. With a CD you can_ read_.

Q.5. RAM is a_ main_memory.

Q1. DEFINE

1. Insertion point______________________________________________________________

2. Screen saver________________________________________________________________

Q2.Fill ups

1. ____________is used to change color scheme and font size.

2. ____________ and _________ are two gadgets.

3. _____________is an image which pops up on computer when computer is left idle for some time.

Q3.one word answer

1. Name any two features of Ms word

_____________________________________

2. Name any two functions of word processor

_____________________________________

New Words

GLIMPSE

RIBBON

TRADITIONAL

VERSION

COMMANDS

ORGANIZED

DOCUMENTS

QUICK

ACCESS

TOOLBAR

Q1. What are tabs? Give the name of any two tabs.
Ans: Tabs are placed at the top of the Ribbon. Each tab represents core tasks we do in given program. Example: Home tab and View tab.

Q2. What are commands? Give the name of any two commands.
Ans: Commands are arranged in different groups. A command can be a button, a menu, or a box where you enter information. Examples: Paste and Bold.

Q3. What are groups? Give the name of any two groups.
Ans: Groups are sets of related commands.
Examples: Clipboard group and Proofing group.

Q4. How you will change font size in MS Word 2010?
Ans: To change font size in MS Word 2010, follow the given steps: Step I: Select the text. Step II: Click on Home tab. Step III: Select the required font size in Font size box in Font group.

I . Fill in the blanks :

1. A ________________ command is used to avoid repetition of commands.

2. The Copy command is available in the _______________ menu.

3. The ____________ command is used to reverse the previous command.

4. A _____________ command is used to write text on the logo screen.

5. __________________ on a word to select it.

6. To make changes, first ______________ the text before performing any operation on it.

7. Blank lines can be inserted in an already existing document by pressing the _______________ key.

II. State whether the following statements are √ or X :

1. You need not save your files before closing them. ____

2. The selected character gets highlighted as white characters on a black back ground. ____

3. You can not draw circles and curves using the REPEAT command. ____

4. MS Word can be used to type letters, paragraph ,etc. ____

5. A REPEAT command can be used within another REPEAT command. ____ 

Q.A- Multiple Choice Questions:

1. The _____________ pen is a small input device used to select and display objects on a screen.
A. Ink
B. Magnetic
C. Light
D. None of the above

2. _______ keys are present on the top row of the keyboard.
A. Function
B. Type writer
C. Numeric
D. Navigation

3. The device primarily used to provide hardcopy is the
A. CRT
B. Computer Console
C. Printer
D. Card Reader

4. Dot-matrix, Deskjet, Inkjet and Laser are all types of which computer peripherals?
A. Printers
B. Software
C. Monitors
D. Keyboards

5. Which among the device that converts computer output into a form that can be transmitted over a telephone line?
A.Teleport
B.Multiplexer
C.Concentrator
D.Modem

6. A light sensitive device that converts drawing, printed text or other images into digital form is
A. Keyboard
B. Plotter
C. Scanner
D.OMR

Q.B - Fill in the blanks:

1. The most widely used input device is the ____________.

2. The term used to define all input and output devices in a computer system is ____________.

3. Information that comes from an external source and is fed into computer software is called _____.

4. The most common method of entering text and numerical data into a computer system is through the use of a ____________.

5. ____________ is an example of output device.

6. ____________ Devices that let the computer communicate with you.

7. ____________ Devices that allow you to put information into the computer.

8. Using output devices one can ____________.

A. Check the Right Answer

1. Which generation of computers will have knowledge of their own?
a. First
b. Second
c. Fourth
d. Fifth
Answer : Fifth

2. What is the maximum storage capacity of a DVD?
a. 1.4 GB
b. 17 GB
c. 3.4 GB
d. 2.4 GB
Answer : 17 GB

3. What is the full form of DVD?
a. Digital Volume Disk
b. Digital Video Disk
c. Digital Video Dial
d. Disk Video Dial
Answer : Digital Video Disk

4. Which disk stores data on its dual side?
a. CD
b. Flash Drive
c. DVD
d. Blu-Ray Disc
Answer : Blu-Ray Disc

B. Fill in the blanks :

1. When we start a computer, the Operating System is loaded into ……………………………
Answer : RAM

2. 1 GB is equal to …………………
Answer : 1024 MB

3. ……………… drive is a plug and play device used for copying and moving data from one computer to another.
Answer : FLASH

4. Hard Disk was invented by IBM team lead by ………….
Answer : REY JOHNSON

C. State True (T) or False ( F)

1. Optical storage media can store more data as compared to a hard disk.
Answer : FALSE

2. Information on a hard disk is recorded on both sides of the disk.
Answer : TRUE

3. RAM stands for Read Access Memory.
Answer : FALSE

4. CD and DVD are similar in terms of shape and size.
Answer : TRUE

D. Application Based the following

1.Sohail could not finish his project work in the class. So, he wants to carry the softcopy of the project to his house in order to finish it. Which device will you suggest him to fulfill the task?
Answer : PEN DRIVE/ CD/ DVD

2.Raghav wants to copy 3 movies on a disk, so as to see them at his place. Which type of disk would be the most suitable for this purpose?
Answer : DVD

A. Tick the correct options:

1. _______________ is used to perform common tasks, such as changing the appearance of files and folders.
Toolbar
Desktop
Program
Folders

2. A ______________ is a collection of related information.
Folder
File
Bag
Book

3. __________undoes the last action.
Ctrl + Y
Ctrl + Z
Ctrl + F4
Ctrl + O

4. Restore option restores the deleted items from ___________ to its original location.
My Computer
My Document
Recycle bin
Control Panel

B. Write the shortcut keys for the following tasks:

1. ______________ Copy the items to the clipboard.

2. ______________ Renames the selected item.

3. ______________ Displays the open dialog box for opening the saved file.

4. _____________ Undoes the last action.

5. __________Paste the copied item or items from the clipboard.

C. Match the columns:

1. Ctrl + O            a. Closes the active document.

2. Alt + F4            b. Undoes the last action.

3. Ctrl + Z            c. Displays the open dialog box.

4. Ctrl + F4          d. Closes the active program window.

D. Answer the following questions:

Q1. How do you search for a file?

Q2. What is Document library?

Q3. What are the components of Windows Explorer?

Q4. What are Accessories?

Q5. What is Navigation Pane?

A) Fill in the blanks for the following :

1. A __________ is an optical storage media that can store upto 700MB of data.

2. A _______________ is the main storage medium for computers.

3. _____________________ is the built-in memory designed to store data and instructions

while the computer is working.

4. __________________ includes typing, editing and formatting the text.

5. _____________ and ___________ options in the Edit menu are used to move the text from

its original location to a new location.

6. _____________ and ___________ option is used to duplicate the text.

7. The _______________ button is used to change the colour of the selected text.

8. A ____________________ is a collection of many web pages linked together.

9. Two or more computers connected together with cables to share information is called a ____________________.

10. A ___________________ is a program to visit webpages.

B) Encircle ONLY ONE correct option of the following :

1. The keyboard shortcut to close a document is _________________.

(a) Alt + F4 (b) Ctrl + F4 (c) Alt + W (d) Ctrl + W

2. Which menu contains the Drop Cap option?

(a) File (b) Edit (c) Insert (d) Format

3. 1 Byte is equal to _____ Bits.

(a) 5 (b) 6 (c) 7 (d) None of these

C) Write the fullforms for the following :

1. DVD 2. TB
3. CPU 4. KB
5. WWW

D) Write the menu options and keyboard shortcuts for the following :
1. New document ____________________________ _______________________
2. Save a document ____________________________ _______________________
3. Open a document ____________________________ _______________________
4. Print a document ____________________________ _______________________
5. Close a document ____________________________ _______________________
6. Exit MS Word ____________________________ _______________________ 

E) State True or False for the following:
1. The clipboard is a reserved place which stores data permanently.
2. To select the entire document, triple click in the selection area or press Ctrl + A.
3. Larry Page is regarded as the founder of WWW.
4. Mozilla Firefox is a browser which lets us to access web pages.
5. Misspelt words are indicated with bold letters.

F) Answer in one word or sentence for each of the following :
1. On which side of the taskbar we have the clock?
2. Which are the two binary numbers?
3. What is the use of a Pen Drive?
4. Write the steps to delete the text.
5. How will you select a paragraph? 

G) Answer the following questions :
1. Write any 3 uses of internet.
2. What is the difference between center alignment and justify alignment?
3. What is the difference between copying the text and moving the text?
4. Which option from the Edit menu is used to delete the selected text?
5. What is a flash disk?

H) Write the storage capacity for the following memory devices:
1. Floppy Disk: _____________________________
2. CD: _____________________________
3. DVD: _____________________________
4. Flash Drive: _____________________________
5. Multimedia Card: _____________________________
6. Hard Disk: _____________________________ 

A. Check the Right Answer

1. Which of these are considered as input devices?
a. Joystick
b. Light Pen
c. Track Ball
d. All of these
Answer : All of these

2. Which one is not a pointing device?
a. Mouse
b. Track Ball
c. Microphone
d. Light Pen
Answer : Microphone

3. Which output device allows you to hear sound?
a. Speakers
b. Printer
c. Monitor
Answer : Speakers

4. Which device gives the output onto a paper?
a. Monitor
b. Printer
c. Speakers
Answer : Printer

B. Fill in the blanks :

1. The devices through which we enter data and instructions are called ………… devices.
Answer : INPUT

2. The printed copy is also called …………………..
Answer : HARD COPY

3. A computer system performs …… basic functions.
Answer : 3

4. The ……………… keys include Alphabet and Numeric keys.
Answer : TYPING

5. The additional parts of a computer system are known as …………………………
Answer : PERIPHERALS

6. ………………… monitors are thinner and lighter than CRT Monitors.
Answer : LCD

7. The ……………… printer uses laser beams and dry ink to print the output on paper.
Answer : LASER

8. A ……….. is a computer screen, which is sensitive to the touch.
Answer : TOUCH SCREEN

9. A CPU is the ……… of a computer where it processes and stores the information.
Answer : BRAIN

10. A ................. copies the text and pictures directly into the computer.
Answer : SCANNER

C. Answer the following

1. What are the physical parts of a computer called?
Answer : HARDWARE

2. Into how many groups can we divide the keys of a standard keyboard?
Answer : FOUR

3. What is used to scan the printed bar codes present on the various products?
Answer : BAR CODE READER

4. Name the device which is connected to the computer and is used for capturing still images and live videos.
Answer : WEB CAMERA

D. Application Based the following

1. Varun wants to buy a thin and light monitor in place of his old CRT monitor. What type of a monitor should Varun buy?
Answer : LCD/LED

2. Surabhi wants to record her voice into the computer. Which device will you suggest her to use?
Answer : MICROPHONE