RTU Kota B.Tech 6th Semester Computer Architecture and Organization Question Paper 2025 (CSE/IT/AI)

RTU Computer Architecture and Organization 2025 Paper Review

Preparing for the Rajasthan Technical University B.Tech Computer Architecture and Organization exam requires a strict understanding of hardware structures, memory hierarchies, and low level instruction execution. For Computer Science, Information Technology, and Artificial Intelligence students, this subject explains how physical circuits execute compiled software logic. You cannot optimize high level code execution or understand hardware bottlenecks without knowing how the central processing unit fetches, decodes, and pipelines instructions.

The 2025 paper tests your capability to trace arithmetic algorithms, draw central processing unit block diagrams, and calculate cache hit ratios. Publishing this specific 6th semester paper review directly to your exam support platform provides engineering students exactly what they need to understand how examiners construct hardware logic problems and distribute marks across the architectural modules. This targeted preparation strategy helps approach the exam confidently, Jaiprakash.

Understanding the Exam Pattern

The RTU theory examination is a three hour paper worth 70 marks. The paper features three distinct sections designed to evaluate both basic hardware definitions and complex architectural calculations.

• Part A: This section contains ten compulsory questions worth two marks each. You must define terms like micro operation, state the difference between RISC and CISC architectures, describe locality of reference, or write the formula for pipeline speedup under 30 words.
• Part B: You will find seven questions here. You must answer five of them. Each question is worth four marks. Your answers require explaining direct memory access block diagrams, calculating cache mapping tag bits, or tracing a floating point addition step.
• Part C: This section offers five major questions. You need to answer three. Each question carries ten marks. These require you to trace the Booth multiplication algorithm step by step for a given set of signed integers, construct a complete direct mapped cache memory system, or detail the instruction cycle with specific timing diagrams.

Core Topics Evaluated in the Paper

The 2025 question paper covers several critical modules that establish the mathematical rules for hardware design. Focus your study time on these specific areas to maximize your score.

Basic Computer Organization and Micro Operations

This module evaluates your understanding of how data moves through internal buses. You must master register transfer language and the logic behind arithmetic and shift micro operations. Study the complete instruction cycle, focusing on the timing and control signals generated during the fetch, decode, and execute phases.

Central Processing Unit and Addressing Modes

You must understand how instructions are structured and formatted. Study the differences between zero address, one address, and two address instruction formats. The paper frequently tests your knowledge of addressing modes. Practice explaining direct, indirect, indexed, and relative addressing modes with clear examples showing how the effective address is calculated.

Pipelining and Vector Processing

Pipelining increases processor throughput by overlapping instruction execution. You must master the mathematics behind arithmetic and instruction pipelines. Practice calculating the maximum speedup ratio $S$ using the formula:

$$S = \frac{n \cdot k}{k + n - 1}$$

where $n$ represents the number of tasks and $k$ represents the number of pipeline segments. Study the structural, data, and control hazards that cause pipeline stalls.

Computer Arithmetic Algorithms

This module requires you to trace hardware level mathematical operations. Focus heavily on multiplication and division circuits. You must master the Booth algorithm for signed binary multiplication. Expect a ten mark question requiring you to set up a tracing table with columns for the accumulator, multiplier register, and the state of the trailing bit to calculate the final 16 bit product. Study the flowchart for restoring and non restoring division algorithms.

Memory and Input Output Organization

Memory speed dictates overall system performance. You must understand the memory hierarchy and virtual memory concepts like paging. The heaviest mathematical focus is on cache memory mapping techniques. Practice calculating the exact number of bits required for the Tag, Line, and Word fields in direct mapped and set associative cache configurations. For input output organization, review priority interrupts and the precise sequence of operations during direct memory access data transfers.

Answer Writing Strategy for High Marks

RTU evaluators look for neat architectural block diagrams, explicit binary tracing tables, and clearly calculated memory addresses. Use a blue pen for text explanations and math steps. Use a black pen and ruler for drawing logic gates, bus layouts, and memory maps.

In Part A, answer directly. If a question asks for the definition of a control word, state clearly that it is a string of binary variables that specifies a set of micro operations to be executed simultaneously by the hardware.

In Part B, use clear computation grids. When calculating cache tag bits, explicitly write down the total main memory size, the cache size, and the block size in powers of two before executing the logarithmic subtractions to prove your logic.

In Part C, precision in execution is critical. When solving a ten mark Booth multiplication problem, draw a neat table. Initialize the accumulator to zero. Write the explicit binary values for the multiplicand $M$ and the negative multiplicand $-M$ in two complement form at the top of the page. Trace every arithmetic shift right operation carefully, and draw a clean box around your final combined product.

Time Management During the Exam

Allocate exactly 20 minutes to Part A. Spend 40 minutes addressing the five short answer questions in Part B. Reserve the remaining 120 minutes for the three long answer questions in Part C. Drawing complex control unit schematics, calculating memory mapping fields, and tracing binary shifts requires steady focus and significant writing time to prevent tracking mistakes. This distribution guarantees you 40 minutes per major question, giving you time to double check your two complement conversions. Use the final 10 minutes to verify your question numbering, ensure all bus diagram arrows indicate the correct data flow, and check that your arithmetic tracing tables match the required number of clock cycles.