Computer Science - Practice Set for Class 3

Chapter 1 - Computer Fundamentals and Devices

Fill in the blanks.

1.          A___________ is used to play games on the computer.

2.          A___________ gives the result on paper.

3.          A___________ mouse is a pointing device.

4.          A___________ is a permanent memory.

5.          A___________ is used to record your voice. 

6.          Printouts are also called __________

7.          _________ is the longest key on keyboard.

8.          _________ is fixed inside the CPU box.

9.          _________ is a set of instructions that runs on the computer.

10.      _________controls all the functions of a computer system.

11.      _________ looks like a TV screen.

12.      CRT , LCD and LED are types of ___________

Tick the correct and cross the wrong ones.

1.          F1, F2……F12 are number keys.

2.          A mouse looks like a TV screen

3.          Computer memory consists of Three Parts.

4.          Enter key is the longest key on a keyboard.

5.          Delete key is used to erase the character to the right of the cursor.

6.          MS-Paint and MS-Word are software programs.

7.          Shift Key is used in combination with other keys.

Answer the following Questions.

1.          What are the two types of computer memories?

2.          Name the part of CPU

3.          Define computer

4.          Name some software programs

5.          What is the function of ALU?

6.          Out of Delete and Backspace key, which  deletes character to the right of the cursor?

Answer: Joystick, Printer, Mouse, ROM, Micro Phone, Hard Copies, Spacebar, Hard Disk, Software, CPU, Monitor, Monitor.   

Chapter 2 – Computer Care

Fill in the blanks.

1.          You should keep the mouse on the _________

2.          Always sit ________ in your chair in front of the computer.

3.          __________ means to close the computer.

4.          __________is used to switch ON or switch OFF the computer.

5.          Always press the keys of the keyboard_____________

6.          You should not touch the ____________ when the computer is ON

7.          You should keep your computer ____________

8.          ____________ the computer after using it.

9.           Do not ______ or_______ in the computer room.

Tick the correct and cross the wrong ones.

1.          Listen carefully to your teacher.

2.          Sit very close to the monitor.

3.          Always go in a queue to the computer room.

4.          Touch the wires when the power button is ON.

5.          You should run in the computer lab.

6.          Do not eat or drink in the computer room.

7.          One can shout in the computer lab.

8.          You should not push the computer table.

Answer the following Questions.

1.          Define the power button.

2.          What will happen if you sit too close to your monitor?

3.          Why should you use the mouse properly?

4.          Why should you not push the computer table?

5.          What do you mean by shutting down the computer?

6.          Should we press the keys of the keyboard gently or hard?

7.          Should we eat or drink in the computer room and thus make it filthy?

8.          Is it required to cover your computer with covers after using it?

Answer: Mouse pad, straight, shut down, power button, gently, wires, clean, cover, eat and drink.  

Chapter 3 – Introduction to MS Windows 7

Fill in the blanks.

1.          Small pictures on desktop are called _________.

2.          The button in the left corner of taskbar is called _______ button.

3.          Microsoft Windows 7 is an ____________ system.

4.          ____________ is a gadget in windows 7.

5.          The band present at the bottom of the desktop is called the _________.

6.          __________ means to close all programs on the computer.

7.          A ____________ is a set of instructions.

8.          ___________ are the tools used to see the information.

9.          Windows 7 ___________ are calendar, clock, weather, picture puzzle, etc.

10.      The Taskbar contains ____________ in the right corner.

Tick the correct and cross the wrong ones.

1.          Microsoft Windows 7 is not an Operating System.

2.          Clock and weather are gadgets in Windows 7.

3.          By Double-clicking an icon, it gets opened.

4.          Date and time appear on the right corner of taskbar.

5.          An operating system controls all the activities of computer.

Answer the following Questions.

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

2.          What is the start menu?

3.          Where do you find the Shut Down button?

4.          Name some gadgets

5.          Define the operating system.

6.          What do you mean by “Shut Down”?

7.          What is the use of a Clock gadget?

Answer: Icons, start, operating, clock, taskbar, shutdown, software, gadgets, start, gadgets, clock.

Chapter 4 – MS- Paint: Start and close

Fill in the blanks.

1.          _____________ bar displays the name of the program.

2.          You can draw and color pictures on computer by using the ____________program.

3.          Paint program is present in __________________.

Tick the correct and cross the wrong ones.

1.          The Title bar contains only two buttons.

2.          Menu bar contains different tabs.

3.          To close Paint, you will click on the exit option.

4.          There are three types of scroll bars.

5.          You cannot start the paint program by using the keyboard.

Answer the following Questions.

1.          Which group is used to use various styles of figures?

2.          Write short –cut command to close the Paint Program.

3.          Name the components of the paint window.

4.          What does the title bar display?

5.          Write the steps to start the Paint Program.

6.          How many tools do you see in the tools group of paint?

7.          What is the color of the drawing area of Paint?

8.          What effect does pressing Alt +F4 have on Paint Program?

Answer: Title, Paint, Accessories

Chapter 5 – MS- Paint: Draw and Color

Fill in the blanks.

1.         A__________ is a closed figure with three or more sides.

2.         To save a drawing, select _________option.

3.         __________ tool is used to make freehand drawings.

4.         To save your work click _______ button and then click Save.

5.         To draw perfect squares, press_______ key while dragging.

6.         __________ tool is used to write some text in the drawing.

7.         The thickness of line can be chosen by clicking the ______ drop-down arrow.

8.         The_____________ tool is selected for drawing a triangle.  

9.         You can draw and ________ pictures in paint.

Tick the correct and cross the wrong ones.

1.         Pencil tool is used to erase your drawing.

2.         A polygon has only two sides.

3.         Perfect circle can be drawn by pressing the shift key.

4.         Fill with color, tool is used to fill color in a closed shape.

5.         You cannot erase your incorrect drawing.

Answer the following Questions.

1.          Name the tool which can be used to draw a circle.

2.          Which tool is used to erase your drawing?

3.          Which key is used to draw perfect squares or circles?

4.          Name any four tools which are used in Paint.

5.          Write the steps to save your drawing.

a)         Click______________ button.

b)         Click______________ option.

c)          Type the ____________ in File Name box.

d)         Click______________ button.

6.          Write the steps to start a new drawing.

Answer: Polygon, save, pencil, paint, shift, text, size, polygon, color.   

Chapter 6- More about Paint

Fill in the blanks.

1.         ________ is used for spray painting.

2.         ________tool is used to see large images.

3.         ________tool is used to copy color from one object to another.

4.         The free from selection tool is used to select __________ area.

5.         You can choose the colors from ___________.

6.         You can choose the thickness of brush from_______ option.

Tick the correct and cross the wrong ones.

1.         Airbrush is used to fill color in air.

2.         Pick Color is used to copy color from objects.

3.         Magnify means to reduce the size of a picture.

4.         To delete an area, use Select Tool.

5.         Brush is used to make freehand drawings.

Answer the following Questions.

1.         Which tool is used to select irregular portions of a drawing?

2.         Which tool is used to copy color from one object to another/

3.         Which brush is used for spray painting?

4.         Complete the steps to magnify an image.

a)         Click____________ tab

b)         Click____________ from_______________ group.

c)         Bring the ______________ to work area.

d)         A _____________ with_______________ appears on the screen.

e)         Click _________ mouse button on that portion you want to___________.

f)          The portion of image appears in _____________________ size.

5.         How many types of selection are possible in Paint?

6.         Can we rotate our Picture in Paint?

7.         Can we pick color of any other object in Paint?

Answer: Airbrush, Magnifier, Pick Color, irregular, color box, size. 

Chapter 7- Introduction to MSW- LOGO

Fill in the blanks.

1.         A command in LOGO is called a_______________.

2.         _________ button clears the drawing made by turtle.

3.         You can exit LOGO by clicking Exit option of ____________ menu.

4.         You can type instructions in the ___________ input box.

5.         ________ button stops the execution of the commands.

6.         MSW Logo screen is divided into ___________ and ______________.

7.         LOGO is a _____________________ language.

8.         _____________ button finds the errors in a program.

9.         Title bar contains __________, ___________ and __________  buttons.

10.     The typed command always appears in _____________ box.

Tick the correct and cross the wrong ones.

1.        Main screen consists of two turtles.

2.        Execute command works in the same way as Enter Command.

3.         Halt command permanently stops the execution of commands.

4.        LOGO is not a computer language

5.        Recall list box stores all the commands typed in the Command input box. 

Answer the following Questions.

1.         What do you mean by primitives?

2.         Write down three uses of LOGO.

3.         How will you start LOGO?

4.         What is the basic use of the recall list box in the commander window?

5.         How will you exit LOGO?

Answer: primitive, reset, File, command, pause, main screen – commander windows, simple computer, trace, minimize-restore – close, recall list box.

Chapter 8 – LOGO commands

Fill in the blanks.

1.         The __________ command is used to clear the drawing from LOGO screen.

2.         The pointed end of the turtle is called ___________.

3.         The Centre of the drawing area is called _________.

4.         To execute the command, press___________ key.

5.         The ___________ command disappears the turtle from the screen.

6.         The ___________ command is used to show turtle on the screen.

7.         To see the result on the screen, click ___________ button.

8.         BACKWARD command moves the turtle _____________.

9.         FORWARD command moves the turtle ____________.

10.     The bottom part of the turtle is called its ____________.

Tick the correct and cross the wrong ones.

1.         To move forward we use BK command.

2.         You cannot type fd in place of FD.

3.         Turtle cannot move more than 500 steps.

4.         Using BK command you can move the turtle backward.

5.         ST command is used to show turtle on the screen.

Answer the following questions.

1.         Where will you find the turtle when LOGO starts?

2.         Which command is used to clear the drawing made by turtle?

3.         Label the Turtle.

4.         How will you start the LOGO?

5.         How will you move the turtle forward by using the BK command?

6.         What will turtle do after moving 500 steps forward from HOME position?

7.          Explain how to start MSW LOGO.

8.         How can we check the position of Turtle?

9.         How to type the following commands in Input Box?

FD 100   BK 50   RT 90   FD -70   BK -100

And observe the movement of the turtle?

10.     What will be the effect of typing FD50 (no space) in the command input box?

11.     What will be the effect of typing BK -20 on the command input box?

12.     What does CS command do?

Answer: CS, Head, Home, Enter, HT, ST, Execute, Backward, Forward, Tail.     

Rearrange the jumbled words:

1.       USRBH		17.   OBX
2.       ITTLE		18.   EHPAS
3.       CENIPL		19.   TSRAT
4.       AINTP		20.   YOPFLP
5.       OCOLR		21.  MATANOINIA
6.       YOLPOGN		22.   CUP
7.       ILNE		23.   PINRETR
8.       RASERE		24.   OUMES
9.       ALOV		25.   YAKEROBD
10.   QSAUER		26.   TROINOM
11.   ICLREC		27.  RUBSH
12.   RAITSHGT		28.  AGNIMFY
13.   DOUNDER		29.  ORTAET
14.   LELIPES		30.   RIARUBSH
15.   UZPLZE		31.   ELESCT
16.   RUSBH

Answer: Brush ,title ,pencil ,paint ,color ,polygon ,line ,eraser ,oval ,square , circle ,straight ,rounded ,ellipse , puzzle , brush ,box ,shape , start ,floppy , animation, cpu , printer ,mouse ,keyboard ,monitor ,brush ,magnify ,rotate ,airbrush , select .