Model Question Class 8 Computer

 

Time: 1:30 hrs                                                                                                    

Class: 8                                                                                                                                        FM: 40

Subject:  Computer                                                                                                                    PM:  16

Group A

1. Short answer questions.                (2x7=14)

a. What is computer?

b. Who is known as father of computer and why?

c. What are application area of computer?

d. What is expression?

e. Why QBASIC is called interpreter?

f. What is the use of input statement in QBASIC?

g. What type of operator is arithmetic operator?

2. Write full form.                 2

a. ALU                        b. CU              . IBM              UNIVAC-I

3. Write the technical term of following statements.                      2

a. The pictorial representation f stepwise instruction for solving a problem.

b. The symbol that tells what type of operation to be performed on the data.

c. The main working area where program are written in QBASIC.

d. Reserved words are known as keyword.

4. Write true or false for following statement.                    2

a. John Napier invented Napier's bone in 1617 A.D

b. The upper part of abacus is known as earth.

c. Numeric data must be enclosed in double quotes.

d. "LET" Statement in QBASIC is used to display the result.

5. Match the following.                     2

William Oughtred                   First Programmer

Charles Babbage                     1934

ENIAC                                   Difference engine

Lady Augusta Ada                 1642

                                                Slide rule        

6. State whether the following are valid or invalid QBASIC Constant.   2

a. 12                b. 13km                       c. " Bakulahi"              d. "Rs.             56.50" 

7. Convert as indicated.                    2

a. (215)₁₀  into decimal            b. (57)₁₀ into binary

8. Perform the following binary calculation.          2

a. 10110 +1110                       b. 11001- 1101

 

Group B

9. Long Answer question.                 2x4=8

a. What is algorithm? Draw flowchart that accept two numbers and display difference of them.   

b. What is variable? Write the rule for naming variable.

10. Write QBASIC program that calculate area of rectangle.                  3

11. Write QBASIC program that calculate volume of cube.         3