Computer Organization and Architecture (BCS302) AKTU previous year questions 2020–2026
Every Computer Organization and Architecture question from 7 AKTU papers, tagged by unit, topic and marks. A few recent questions from each unit are listed below; open the page to filter by unit, topic or mark type.
Unit 1: Introduction & Processor Organization – AKTU PYQs
- What is a bus? Explain different types of buses used in a computer system. (2 marks, 2026, Buses & Bus Arbitration)
- Explain the functional units of a digital computer system. (2 marks, 2026, Functional Units & Interconnection)
- Explain bus architecture and its role in interconnecting various components of a digital system. (2 marks, 2026, Buses & Bus Arbitration)
- What is a register? Explain general-purpose and special-purpose registers. (2 marks, 2026, Processor & Register Organization)
- Enlist the basic functional units of a digital system? (2 marks, 2025, Functional Units & Interconnection)
Unit 2: Arithmetic & Logic Unit – AKTU PYQs
- Explain the working of carry look-ahead adder with the help of an example. (2 marks, 2026, Adders & Look-Ahead Carry)
- Explain signed number multiplication using Booth’s Algorithm. Multiply A × B where A= –5 and B=3 using Booth’s Algorithm. (2 marks, 2026, Multiplication Algorithms)
- Explain floating-point representation and its components. (2 marks, 2026, Floating Point Arithmetic & IEEE 754)
- Multiply the following numbers using Array Multiplier technique: A = 1101, B = 1011 (7 marks, 2026, Multiplication Algorithms)
- Explain the design of an Arithmetic and Logic Unit. Describe various arithmetic and logical operations performed by ALU. (7 marks, 2026, ALU Design)
Unit 3: Control Unit & Pipelining – AKTU PYQs
- Explain different types of instructions. Explain various instruction formats with suitable examples. (7 marks, 2026, Instruction Types & Formats)
- Explain the concept of RISC architecture. Discuss its features and advantages. Compare RISC with CISC architecture. (7 marks, 2026, RISC & Program Control)
- Explain instruction pipelining. A pipeline has 5 stages and each stage takes 20 ns. i. Calculate the time required to execute 10 instructions without pipelining. ii. Calculate the execution time with pipelining. iii. Find the speedup. (7 marks, 2026, Pipelining)
- Explain the design and working of a hardwired control unit. Discuss about its advantages and disadvantages. (7 marks, 2026, Hardwired & Microprogrammed Control)
- What are micro-operations? Explain different types of micro-operations. (7 marks, 2026, Instruction Cycle & Micro-operations)
Unit 4: Memory – AKTU PYQs
- Explain the memory hierarchy with diagram. A memory chip has a capacity of 64K × 8. i. Find the number of address lines required. ii. How many such chips are needed to design a 256K × 16 memory system? (7 marks, 2026, Memory Concept & Hierarchy)
- Explain the following cache mapping techniques: i. Direct Mapping ii. Associative Mapping iii. Set-Associative Mapping (7 marks, 2026, Cache Memory)
- Explain 2D and 2½D memory organization. Write their advantages and disadvantages. (7 marks, 2026, Semiconductor RAM & ROM Memories)
- Explain the purpose of ROM memories in computer systems? (2 marks, 2025, Memory Concept & Hierarchy)
- Discuss the characteristics and functionalities of auxiliary memories such as magnetic disks, magnetic tapes, and optical disks? (7 marks, 2025, Auxiliary Memory)
Unit 5: Input / Output Organization – AKTU PYQs
- What is an I/O interface? Explain its functions. Why is an interface required between CPU and I/O devices? (7 marks, 2026, I/O Interface & Ports)
- Define and differentiate synchronous and asynchronous communication with example. (7 marks, 2026, Serial Communication & Interfaces)
- Explain the concept of interrupts. Describe interrupt hardware and explain different types of interrupts. (7 marks, 2026, Interrupts & Exceptions)
- Explain the working of Direct Memory Access. Describe the DMA controller and its advantages over other I/O methods. (7 marks, 2026, Modes of Data Transfer)
- Enlist the peripheral devices in a computer system? (2 marks, 2025, I/O Interface & Ports)