Computer Science Important Questions for 9th Class

By: Prof. Dr. Fazal Rehman | Last updated: March 10, 2024

Computer Science Class 9^th Objective (2019)   (1) Third Generation Computers use: (A) Vacuum tubes (B) Integrated circuits (C) Transistors (D) Microprocessors (2) Which language belongs to low level language? (A) Assembly Language (B) BASIC (C) PASCAL (D) Fortran (3) Which is Output Device? (A) Mouse (B) System unit (C) Camera (D) Printer (4) Hard Disk is a__ Disk.   (A) Optical (B) Magnetic (C) Random Access (D) Read only (5) One Kilo Byte is equal to:   (A) 1000 bytes (8) 2¹⁰ bytes (C) 2²⁰ bytes (D) 2³⁰ bytes (6) Base of octal number system is: (A) 16 (B) 2 (C) 8 (D) 10 (7) “OR” operator is represented in Boolean Algebra: (A) “*” (8) “+” (C) “-” (D) “.” (8) Operating system is a: (A) Game (B) System software (C) Control Pannel (D) ALU (9) Klez is a name of: (A) Virus (B) Game (C) Hardware (D) Speaker (10) Icon is a: (A) Graphic image (B) Word file (C) Sound file (D) Virus   Subjective (2019)   Short Questions

1. Write the names of any four high level languages.
2. What is meant by Programming Language?
3. Define Digital Computer.
4. Who was John Napier?
5. Define Program.
6. Define Electronic Data Processing.
7. What is the use of Trackball?
8. Describe any two differences between RAM and ROM.
9. White the difference between Bit and Byte.
10. What is Low-Level Formatting?
11. Convert the 27₍₁₀₎ to binary number system.
12. Describe the difference between Data and Information.
13. Who and when invented the Boolean Algebra?
14. Write down two names of External Command.
15. Define Drive.
16. What is meant by Windows?
17. Write down the names of two popular operating systems (OS).
18. What is Desktop?

Long Questions

1. Explain organization of Computer.
2. What is meant by Keyboard? Explain Alphanumeric Keys and Cursor Control Keys.
3. Make truth table of the following functions:

(a) f(x, y) = x.y+.y (b) f(x, y) = x.+.y

Past Papers of Computer Science 9th Class – 2023 Gujranwala Board

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