Past Paper 2025 11th Class Karachi Board Computer Science Subjective

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SECTION “B” (Short Answer Question) Marks:30

NOTE: Attempt any TEN part questions in all. All part questions carry equal marks. Answer should not exceed 6 to 7 lines

2.

i) What are the main devices of IoT?

ii) Differentiate between Synchronous and Asynchronous.

iii) What do you mean by primary and secondary storage?

iv) Define the role of application software in computer field.

v) Define the concept of binary digits (bit, bytes and Nibble) in computing.

vi) What is the difference between compiler and interpreter?

vii) What are main difference between Impact and Non-Impact Printer?

viii) What is Metropolitan Area Network?

ix) Define any three input and output devices.

x) Draw any one diagram of the following equation using logical gates: *(A.B) + (A.B) = C *X + (Y.Z) = W

xi) What is the main purpose of ALU?

xii) Define different types of ROM.

xiii) Convert any three of the following number system. *(0111)2 .... (?) 10 *(243)8 .... (?) 10 *(188)10 .... (?) 2 *(659)10 .... (?) 8 *(ABC)16 .... (?) 10 *(785)10 .... (?) 16

xiv) Draw block diagram of a computer system.

xv) Define advancement in computer generation and highlight the key features of fourth generation.

Section C (Detailed –Answer Question) (30)

NOTE: Attempt any THREE question from this section.

-v) All questions carry equal marks.

3. Define Computer Network. Describe LAN and WAN with the diagram.

4. Define data communication Also describe its main components.

5. Describe different modes of data communication with examples.

6. What is the purpose of an Operating System in a computer? Describe its features.

7. What is Boolean Algebra? Also write it rules and construct a truth table for two inputs to perform AND & OR logical operations.

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