RTU Kota B.Tech 6th Semester Computer Architecture and Organization Question Paper 2022 (IT)

RTU Computer Architecture and Organization 2022 Paper Review

The Computer Architecture and Organization (CAO) exam for the 6th semester at Rajasthan Technical University focuses on how hardware executes instructions and manages resources. For IT students, this course is essential for understanding performance optimization, low-level system design, and the interaction between hardware and software. You must move past high-level abstractions to master the mechanics of the CPU, memory subsystems, and bus communication.

The 2022 question paper emphasized analytical problem-solving and architectural design. Examiners expected students to demonstrate their ability to execute arithmetic algorithms, solve pipeline hazards, and explain memory management techniques. This review provides the context needed to navigate the 2022 paper and sharpen your preparation.

Understanding the Exam Pattern

The RTU theory examination is a three-hour paper worth 70 marks, organized into three parts:

• Part A (20 Marks): Ten compulsory questions, two marks each. These test fundamental concepts. Expect definitions of Von Neumann vs. Harvard architecture, addressing modes, instruction cycles, cache hit/miss, and basic logic circuit components. Keep your answers brief and to the point.
• Part B (20 Marks): Seven questions; answer five. Each is worth four marks. These are analytical. Prepare to draw block diagrams, explain the difference between RISC and CISC architectures, or describe the steps in a DMA transfer.
• Part C (30 Marks): Five major questions; answer three. Each is worth ten marks. These involve complex problems. Prepare for deep-dive questions on Booth’s multiplication, solving hazards in a pipelined processor, mapping techniques for cache memory, or explaining the design of a control unit.

Core Topics Evaluated in the 2022 Curriculum

Focus your study time on these specific modules to maximize your score:

Arithmetic and Logic Unit (ALU)

This is a frequent high-weightage area. Master signed multiplication using Booth’s Algorithm—you should be able to perform the multiplication of two signed integers and draw the corresponding flowchart. Study floating-point representation (IEEE 754) and the carry-lookahead adder design.

Instruction Set and Addressing Modes

Understand how different addressing modes (Immediate, Direct, Indirect, Register, Indexed, etc.) affect the efficiency of your code. You must also be capable of translating high-level expressions (like $X = (A + B) * (C + D)$) into various instruction formats (Three-address, Two-address, One-address, and Zero-address/Stack-based).

Memory Organization and Hierarchy

The hierarchy—from registers and cache to main memory and secondary storage—is a classic exam topic. Study cache mapping techniques (Direct, Associative, and Set-Associative mapping). Understand virtual memory concepts, paging, and replacement algorithms like FIFO and LRU.

Pipelining and Parallel Processing

This module is critical for modern processor design. Master the three types of pipeline hazards:

• Structural: Resource conflicts.
• Data: Dependency on previous instruction output.
• Control: Branching issues.
• Learn how to solve these using techniques like operand forwarding, branch prediction, and delayed branching.

Control Unit Design

Contrast hardwired versus microprogrammed control units. Be prepared to explain the control signals, timing, and sequencing required to execute instructions in a general-purpose register organization.

Answer Writing Strategy for High Marks

RTU evaluators prioritize logical rigor and visual clarity:

• Diagrams: Use a ruler and black pen for block diagrams. Whether it is a DMA controller, a cache mapping scheme, or a 4-bit arithmetic unit, a clean, labeled diagram is essential for full marks.
• Formatting: Use headings and bullet points for your explanations. For Part C, always start with an introduction of the algorithm or architecture, followed by the technical details, and end with the advantages/disadvantages.
• Precision: If the question involves an algorithm (like Booth's), show your work step-by-step. If you are calculating cache misses, explicitly state your formula and intermediate steps.
• Comparative Tables: Whenever the paper asks to compare two concepts—like "RISC vs. CISC" or "SRAM vs. DRAM"—always use a table to clearly delineate their differences.

Time Management During the Exam

• Part A (20 minutes): Finish these first to secure your 20 marks quickly.
• Part B (40 minutes): Aim for roughly 8 minutes per question. If a derivation takes longer, move on to the next part and return to it later.
• Part C (120 minutes): Allocate 40 minutes for each major question. Use this time to carefully execute your diagrams and detailed mathematical derivations.