Model Question Computer science class 9 set 1

 

Time: 1: 30 hrs                                                                                                   

Class: 9                                                                                                                  FM: 40

Subject: Computer science                                                                                PM: 16

Group A

Computer Fundamental (20 marks)  

1. Answer the following question.                              [10]

a. What is integrated circuit? List its advantages over transistor.

b.Draw the label diagram of the computer architecture?

c. What is barcode? Which device is used to Read barcode.

d.Why do computer need primary memory?

e. What is GIGO?

2. Convert  as instructed:                                 

a.(1110110011)₂ into Hexadecimal

b. (664)₈ into Decimal

3. Perform the binary calculation.                    ]

a. 11110001+10101111                      b. 1111-11

4. Write down the full form.                            

a. ALU b. VLSI            c. OCR             d. LED

5. Give technical term of following.                

a.The combination of 1024 kilobytes.

b. The process of detecting and removing error form the program.

c. The memory that can directly access by the cpu.

d. The input device which convert  text or image into digital form.

6. Match the following.                                                

 Group A                                 Group B

Data                                         Error due to  the wrong input

Information                             Storage device

GIGO                                       Error in the program

Bug                                          Raw fact or symbol

                                                Processed data

Group B

Qbasic Programming (20 marks)

7.Answer the following question.

a.What is variable? list different types of variable.

b.What do you meant by looping?

c.What is library functions?

8.Rewrite the following program with correcting the bugs.             [2]

CLS

REM to generate series 1,9,25………upto 10^th term

x=1

a=1

WHILE x>=10

PRINT a²

a=a+1

x=x+1

LOOP

END

9. Write the output of the following program                                   [2]

CLS

A$="BAKULAHI"

FOR I=LEN(A$) TO 1 step -1

B$=LEFT$(A$,I)

PRINT B$

NEXT I

END

10.Read the following program and answer the following question. 

CLS

N=1

A=1

WHILE N<=10

PRINT A

A=A+1

N=N+2

WEND
END

a. How many time loop repeat?

b. What will happen, if N=N+1 Statement is removed from program.

11. a. Write a Qbasic program that calculate the simple interest.                      [2]

b. Write a program that display the sum of digit in an integer.             [3]

c. Write a  program that display the reverse of  an string.                                [3]

 

****Best Of Luck ****