Computer Studies 9th Class 2018 MCQs & Question Answer Leave a comment

Marks: 85                            Time: 3 Hrs

COMPUTER STUDIES (Science Group)

 SECTION “A” (COMPULSORY)

MULTIPLE CHOICE QUESTIONS (M.C.Qs) (Marks: 15)
Q1 Choose the correct answer for each the given options:
  1. LCD stands for:
      • Light Code Digit
      • Light Color Display
      • Liquid Crystal Display
      • None of these

     

  2. The command that deletes directories along with files is:
      • DEL
      • DELTREE
      • RD
      • RMDIR

     

  3. Transistors were the invention of:
      • First Generation
      • Second Generation
      • Third Generation
      • Fourth Generation

     

  4. For Engineering Applications the machine used is:
      • Laser printer
      • Pen plotter
      • Electrostatic plotter
      • Ink-jet printer

     

  5. Non-volatile memory is:
      • SRAM
      • DRAM
      • DIMM
      • None of these

     

  6.  Laser beam technology is used in:
      •  Optical disk
      •  Magnetic tape
      •  Magnetic disk
      •  None of these

     

  7.  According to the Associative Law of Boolean Algebra:
      •  A(BC)= (AB)C
      •  B=BB
      •  B = B(B+O)
      •  A+ B= B+ A

     

  8.  The command that can show date in a prompt is :
      •  Prompt $date
      •  Prompt $t
      •  Prompt $d
      •  Prompt $p

     

  9. The Characteristic of a monitor that effects on the sharpness of an image on screen is called:
      •  Convergence
      •  Pixel
      •  Dot pitch
      •  Bandwidth

     

  10.  A convenient place to store documents, graphics or other files that access quickly is :
      •  My network place
      •  My documents
      •  My computer
      • Folder

     

  11. Arithometer is the invention of :
      • . Charles babbage
      •  Charles Xavier
      •  Joseph Jacquard
      • Leibniz

     

  12. The process of creating sectors and tracks on disk is :
        •  Booting
        •  Formatting
        •  Tracking
        •  Listing

       

  13.  CD-Writer is used as device for
      •  Input
      •  Output
      •  Both input/output
      •  Storage

     

  14.  The place that is used to connect various external devices to the computer is :
      •  Serial
      •  USB
      •  Port
      •  Bus

     

  15.  Antivirus software removes it :
      •  Bad sector
      •  Dust
      •  Insects
      •  Virus

     

 

Section “B” Short Question Answer                 (Marks : 36)

Note : Answer Any 9 Question From this section. All Question carry equal marks.

Q 2. What is wallpaper ? How can we change the wallpaper of the desktop?

Q 3. Classify the monitor according to colour capabilities.

Q 4. Where we can find the deleted files and folders in the windows operating system? aslo write              how the file and folder send over there ?

Q 5. State and prove the following boolean’s rules.

      • A  + 1 =1
      • A • 0 = 0
      • A = Ā  = 1
      • Ā = A

Q 6. Differentiate between SRAM and DRAM.

Q 7. why do we need an operating system?

Q 8. Convert the following into given equivalent system.

    1. (10110100111)2  = (?)16
    2. (1705)8 = (?)10
    3. (340)10 = (?)2
    4. (10001101)2  =  (?)10

Q 9. Define 1st generation of computer. name any three famous computers of 1st generation.

Q 10. Give the appropriate DOS command for the task given below.

    1. Print a file ABC.txt to printer
    2. Change the directory from XYZ to Root.
    3. Show the list of all files whose name starts with the letter “C”.
    4. Copy the entire contents of a disk to another disk.

Q 11. Solve the following binary Numbers.

      1. ( 1110011)2  +  (11011)2
      2. (11010011)2  – (11111)2
      3. (1010101)2  x  (111)2
      4. find the 2’s complement of (101011)2

Q 12. What do you mean by pointing input device? Write Some examples of such devices.

Q 13. Which the help of Karnaugh map Simplify consists of both analog and digital system.

    1. .
    2. .

Q 14. Name the define the computer which consists of both analog and digital system.

Q 15. State and prove the demorgan’s equation.

 

 

Section  ” C

( Detailed Answer Questions )           (Marks = 24)

NOTE: Attempt any four questions from this section. All Questions carry equal marks

Q 16. What is karnaugh map? How can K-Map help to simplify a boolean expression?

Q 17. Define CPU describe its functions and draw block diagram.

Q 18. Define the various coding schemes used in the computer system.

Q 19. Define keyboard? Explain its different parts.

Q 20. What is windows desktop? Explain its important elements.

Q 21. Define ports and is types in details.

 

 

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