Computer Science - Practice Set for Class 4

Chapter1. How does a Computer Work

A.       Fill in the blanks.

1.The word compute means to_________

2._______means raw facts and figures.

3.The result of processed data is called _________

4.A computer works on the principle of __________ cycle

5.A computer is an ___________ machine

6.Computer cannot __________ and imagine

7.____________ is processed data

8.Processing is calculating or ____________ the data

9.Data is raw___________ or ____________

Answer : Calculate, Data, Input, Electronic , Think and Imagine, Information, Sorting, Facts and Figures.

B.       Mark (T) correct and (F) the wrong ones.

1.    Computer works slowly

2.    Computer stores lots of information

3.    Computer gets tired easily

4.    Data is processed information

5.    Computer converts the instructions into binary codes

6.    CPU is common processing unit.

C.       Answer the following Questions.

1.Define computer

2.Write the names of some places where computer is used.

3.Define the following terms.

Input

Process

Output

Data

Information

4.Write the difference between man and computer

Chapter2. Characteristics of a computer

A.       Fill in the blanks.

1.    ____________ means to do some work without any error.

2.    A computer always follows your___________

3.    A computer cannot take its own ___________

4.    You can use a___________ to schedule your appointments.

5.    A computer works at high_________

6.    You can ___________to songs on the computer

7.    ____________means to perform many activities at the same time.

8.    A computer cannot detect ____________input given by user.

9.    A computer is an ________ machine.

Answer: Accuracy, Instructions, Decisions, Calendar, speed, listen, Versatility, Wrong, Electronic.

B.       Mark (T) correct and (F) the wrong ones.

1.    A computer works at high speed.

2.    A computer cannot store a large amount of data.

3.    You can play games and listen to music on a computer at the same time.

4.    Accuracy and versatility are important feature of a computer at the same time.

5.    You cannot type letters on a computer.

C.       Answer the following Questions.

1.    What do you mean by accuracy of a computer?

2.    Write any one limitation of a computer?

3.    Mention any two characteristic of a computer?

4.    Mention any two uses of a computer.

5.    Write down any two things that you like to do most on a computer. 

Chapter3. Input and Output Devices

A.       Fill in the blanks.

1.    __________ is used to record sound into the computer.

2.    __________ looks like a upside down mouse

3.    __________ is a pointing device

4.    __________is a sequence of black lines on the white background

5.    __________is used to play games on a computer.

6.    __________is commonly used in laptops.

7.    __________is used to read and scan the text.

8.    __________is a pen shaped pointing device.

9.    __________is the brain of a computer.

Answer: Microphone, Trackball, Mouse, Barcode, Joystick, Touchpad, Scanner, Light Pen, CPU

B.       Mark (T) correct and (F) the wrong ones.

1.    ALU stands for Arithmetic and long unit

2.    Speakers are used to hear the sound.

3.    Barcode readers are used in supermarkets.

4.    Scanner is an output device

5.    Light pen is a ball shaped device.

C.       Answer the following Questions.

1.    Write the names of any two:

Input Devices

Output Devices

Storage Devices

2.    Write down the names of different parts of CPU

3.    Name any two types of monitors used nowadays.

4.    What is a scanner?  Also name the two types of scanner.

5.    What is a light pen?

Chapter4. MS- Windows 7

A.       Fill in the blanks.

1.    To permanently delete a file or folder, press __________

2.    A moving text or picture on computer screen is called________

3.    __________acts like a dustbin of a computer.

4.    A ________contains the information on the computer.

5.    A folder is a collection of __________

6.    Recycle bin stores the ____________items

7.    _____________icon contains files and folders

8.    _____________means to change the name of a file

9.    To quit windows, click start button and the____________

Answer:  Shift+delete ,Screen Saver, Recycle Bin, File , File, Deleted, Documents, Rename, Shutdown. 

B.       Mark (T) correct and (F) the wrong ones.

1.    You can also copy a file by pressing Ctrl + C .

2.    Small pictures on desktop are called items.

3.    Windows 7 is not an operating system.

4.    You cannot create more than one new folder.

5.    Recycle bin stores all your important files.

C.       Answer the following Questions.

1.    Write the name of some icons present on a desktop.

2.    What is a file?

3.    Define The Following Terms

Icon

Screen Saver

Wallpaper

4.    How will you exit Windows?

Chapter5. MS-Paint

A.       Fill in the blanks.

1.    Flip or rotate commands are present in ________ group.

2.    ______ Command is used to take printouts of your drawing.

3.    When you cut a part of your drawing, it is temporarily stored in _______

4.    ________ means to turn the image around a central point.

5.    The _______ option is used to make a duplicate copy of selected part of drawing.

6.    The _______ option is used to save the image.

7.    _______ and ________ are two tabs in ribbon.

8.    The ________ option can be used to delete a part of the drawing.

Answer: image, print, clipboard, rotate, copy, save as, home and view, crop

B.       Mark (T) correct and (F) the wrong ones.

1.    You cannot resize an image in paint.

2.    Print command is used to take printouts of your drawing.

3.    You can easily cut, copy and paste an image.

4.    Edit colors command is not present in colors group

5.    Cut, copy and paste commands are present in clipboard group.

C.       Answer the following Questions.

1.    Name the command to view the drawing on full computer screen.

2.    What is the use of “Copy” command?

3.    Write the uses of following commands.

Zoom In

Zoom Out

Gridlines

Rulers

4.    Write down the steps to save your drawings.

Chapter6. LOGO Primitives

A.       Fill in the blanks.

1.    _________  command is used to erase the commands from input box.

2.    The LOGO commands are called __________

3.    ___________ command prints the text in drawing area .

4.    ___________ command shows the turtle.

5.    ___________ command prints the text in recall  list box.

6.    __________ hides the turtle.

7.    __________ command brings the turtle to its home position.

8.    __________command erases the incorrect lines drawn by turtle.

Answer: CT, Primitives, LABEL, ST, PR, HT, HOME, PE

B.       Mark (T) correct and (F) the wrong ones.

1.    RT command is used to turn the turtle left from input box

2.    HIDE turtle shows the turtle on screen.

3.    PRINT command prints only sentences.

4.    CT and CS commands do the same work.

5.    FD and BK are also LOGO primitives.

C.       Answer the following Questions.

1.    Which command is used to bring the pen down?

2.    Which command is used to pick the eraser?

3.    Which command is used to clear the drawing?

4.    Name the following LOGO primitives.

        

FD :                         HT :

CT :                         PR :

RT :                         BK :  

ST :                        CS :

LT :                        SETH :

PU :                        PD:

PE :                         PPT:

5.    Write the difference between PRINT and LABEL commands.

6.    What is the basic use of CS command?

7.    To print multiple words , we must  enclose the sentence with :

Chapter7. LOGO Calculations

A.       Fill in the blanks.

1./   is the sign of _____________ operation.

2.___________ command displays the result in commander window.

3.___________ command displays the result in drawing area.

4.The * symbol is used for _______________

5.PRINT command is used to display the result in __________ window.

6.The symbol + is used for ____________

7.PR 30-20 will print ________ in commander window.

8.The ( sum 5 10) will print_______________

9.The QUOTIENT 50 5 will give result as ______________

Answer: division, PRINT, LOGO, multiplication, commander, addition, 10, 15, 10.

   

B.       Mark (T) correct and (F) the wrong ones.

1.    PR 10*20 is the correct way to find product.

2.    Quotient is the result you get after multiplying two numbers

3.    LABEL command will display the result in recall list box.

4.    PRINT command will print the result in drawing area.

5.    SUM gives you addition of two numbers.

C.       Answer the following Questions.

1.    Name the mathematical operations which can be performed using LOGO commands.

2.    Name the two commands which are used to perform mathematical operations.

3.    Write the output for the following commands.

a)        PR 50-30

b)        PR 7*9

c)        PR (SUM 7 10 13 4)

d)        LABEL 50*5

e)        LABEL 100-20

f)         PR SUM 31 32

g)        LABEL 100-100

h)        PR QUOTIENT 64 8

4.    Which of the following commands is not equivalent?

a)        PR QUOTIENT 10 5 and PR 10/5

b)        PR PRODUCT 3 4 and PR 3*4

c)        PR 2+3+4 and PR SUM 2 3 4

 

Chapter8. Introduction to MS Word 2010

A.       Fill in the blanks.

1.    _________ displays the name of document.

2.    _________ displays the page number and number of words.

3.    Ctrl + B is used to make text ______________

4.    Ribbon contains tabs and ________________

5.    ____________ is word processing software.

6.    Title bar displays the ___________ of file.

7.    Ctrl + U are used to ____________the text.

8.    ________ is used to make text italic.

9.    ________means changing font size, style and color.

10.  The size of the letters in the text is called the ________.

Answer: Title Bar, Status Bar, bold, groups, MS word, name, underline, Ctrl+L, Formatting, Font Size.

B.         Mark (T) correct and (F) the wrong ones.

1.    There is only one scroll bar in MS Word.

2.    Status bar displays the name of file.

3.    Ribbon contains several tabs and groups.

4.    You can easily see page number and number of words in documents.

5.    Paint button is present on Quick Access Toolbar.

C.       Answer the following Questions.

1.    Name the shortcut key to save the file.

2.    Name the shortcut key to make text bold.

3.    Name the shortcut key to open a document.

4.    What is basic use of rulers in a document?

5.    How will you exit from MS Word?

D.       Write the functions of the following shortcut keys.

Ctrl+S

Ctrl+N

Ctrl+O

Ctrl+B

Ctrl+U

Ctrl+I

Arrange the jumbled words:

1.UPC

2.UTNIP

3.ADTA

4.UTOTUP

5.SESCORP

6.ORINMFTAINO

7.ATDA

8.CUCATERA

9.EMMROY

10.  IDLIEGCEN

11.  ALECNADR

12.  CION

13.  ESDKOTP

14.  IEFL

15.  OLFERD

16.  LLAWPRAPE

17.  OZOM                 

18.  OPYC

19.  TUC

20.  IFLP

21.  ORATET

22.  OLOG

23.  ABLEL

24.  RIPNT

25.  IGRHT

26.  ELFT

27.  BRBINO

28.  USM

29.  ORPUCDT

30.  DAD

31.  IDIVDE

32.  UMTLIPYL

33.  ABLEL

                                  

Answers: 1. CPU 2.INPUT 3.DATA 4.OUTPUT  5.PROCESS 6.INFORMATION 7.DATA 8.ACCURATE   9.MEMORY 10. DILIGENCE   11. CALENDER 12.ICON 13.DESKTOP 14.FILE  15. FOLDER 16.WALLPAPER 17.ZOOM 18.COPY   19.CUT 20.FLIP 21.ROTATE 22.LOGO 23.LABEL 24.PRINT 25.RIGHT 26. LEFT 27.RIBBON 28.SUM 29.PRODUCT 30.ADD 31.DIVIDE 32.MULTIPLY 33.LABEL