CS-404 RGPV B.Tech
Computer Org. & Architecture (COA)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
7 papers, latest Jun 2026
- CS-404 paper, Jun 2026
- CS-404 paper, Jun 2025
- CS-404 paper, Dec 2024
- CS-404 paper, Jun 2024
- CS-404 paper, Nov 2023
- CS-404 paper, Jun 2023
Syllabus, notes and important questions for CS-404
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Basic Structure of Computer 13 topics
- Structure of Desktop Computers
- CPU: General Register Organization‑Memory Register
- Instruction Register
- Control Word
- Stack Organization
- Instruction Format
- ALU
- I/O System
- Bus
- CPU and Memory Program Counter
- Bus Structure
- Register Transfer Language‑Bus and Memory Transfer
- Addressing Modes
Unit 2 Control Unit Organization 9 topics
- Basic Concept of Instruction
- Instruction Types
- Micro Instruction Formats
- Fetch and Execution Cycle
- Hardwired Control Unit
- Microprogrammed Control Unit
- Microprogram Sequencer
- Control Memory
- Sequencing and Execution of Micro Instruction
Unit 3 Computer Arithmetic 8 topics
- Addition and Subtraction
- Complement Representation Tools
- Signed Addition and Subtraction
- Multiplication and Division
- Booth’s Algorithm
- Division Operation
- Floating Point Arithmetic Operation
- Design of Arithmetic Unit
Unit 4 I/O Organization 6 topics
- I/O Interface – PCI Bus
- SCSI Bus
- USB
- Data Transfer: Serial, Parallel, Synchronous, Asynchronous Modes of Data Transfer
- Direct Memory Access (DMA)
- I/O Processor
Unit 5 Memory Organization 8 topics
- Main Memory – RAM, ROM
- Secondary Memory – Magnetic Tape, Disk, Optical Storage
- Cache Memory: Cache Structure and Design
- Mapping Scheme
- Replacement Algorithm
- Improving Cache Performance
- Virtual Memory
- Memory Management Hardware
Unit 6 Multiprocessors 9 topics
- Characteristics of Multiprocessor
- Structure of Multiprocessor – Interprocessor Arbitration
- Inter‑Processor Communication and Synchronization
- Memory in Multiprocessor System
- Concept of Pipelining
- Vector Processing
- Array Processing
- RISC and CISC
- Study of Multicore Processor – Intel, AMD
Exam insights
Counted from 7 past CS-404 papers.
Marks asked per paper, by unit
-
Unit 1 Basic Structure of Computer 15 marks
-
Unit 2 Control Unit Organization 8 marks
-
Unit 3 Computer Arithmetic 14 marks
-
Unit 4 I/O Organization 20 marks
-
Unit 5 Memory Organization & Multiprocessors 38 marks
Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.
Asked again and again
-
What is cache mapping? Explain the different cache mapping techniques with examples.
Asked 5 times: 2026, 2023, 2020, 2019
-
Compare and differentiate RISC vs CISC architectures, including definitions, characteristics, and examples.
Asked 4 times: 2026, 2025, 2024, 2023
-
Explain what Direct Memory Access (DMA) is and how DMA operation / DMA controller works with block diagram.
Asked 4 times: 2026, 2024, 2023, 2019