Practice Question

Duration: 2 min

This video lesson is available to enrolled students.

Return to /learn/HPSC-PGT-COMPUTER-SCIENCE/computer-system-organisation/instr-formats-modes/instruction-structure/asset-practice-question-2850 after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. HPSC Interview Preparation: Interview Preparation
  2. Python Language: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis, DSA using Python
  3. Data Structure & Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Sorting Algorithms, Minimum Spanning Trees, Time Complexity Analysis, Graph Theory, Shortest Path Algos
  4. Computer Networks: Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  5. Computer System & Organisation: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer
  6. Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, SQL, File Organization & Indexing, Transaction Management, Concurrency Control
  7. Operating Systems: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling
  8. Digital Logic & Circuits: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation
  9. Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Pushdown Automata & CFG, Turing Machines, Moore & Mealy Machines
  10. Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  11. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, Data Warehousing & Mining
  12. Introduction to Emerging Trends: Emerging Tech Trends
  13. Digital Society & Cyber Law: Society, Law & Ethics
  14. HPSC PGT Previous Year Paper:
  15. HPSC Assistant Professor Previous Year Paper:
  16. Live Sessions: HPSC Live Sessions, EMRS TGT/PGT Live Class
  17. Full Mock Test:
  18. HPSC PGT - MOCK Test Series:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video features an educational lecture by Sanchit Jain from Knowledge Gate, focusing on computer architecture instruction formats. The instructor solves a problem involving a hypothetical machine with 16-bit instructions and 4-bit addresses. He systematically calculates the number of supported instructions for 1-address, 2-address, and 3-address formats by determining the remaining bits available for the opcode after accounting for address fields.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video begins with a slide presenting a specific problem statement: 'Consider a hypothetical machine where each instruction of 16 bit. If address uses 4 bits then.' The instructor, identified as Sanchit Jain from Knowledge Gate, starts by addressing the first question regarding 1-address instructions. He draws a long horizontal rectangle representing the 16-bit instruction word. He divides this rectangle into two sections: a larger section labeled '12' for the opcode and a smaller section labeled '4' for the address. He writes the mathematical expression 2^12 = 4096 in red ink below the diagram to calculate the total number of supported 1-address instructions. He then transitions to the second question about 2-address instructions. He redraws the 16-bit bar, this time splitting it into three parts: an 8-bit opcode section and two 4-bit address sections. He calculates the number of supported instructions as 2^8 = 256, demonstrating how the opcode space shrinks as address fields are added.

  2. 2:00 – 2:15 02:00-02:15

    Continuing to the third question, the instructor analyzes 3-address instructions. He sketches a 16-bit instruction format divided into four distinct 4-bit blocks. Three of these blocks are allocated for the three addresses, leaving only the first 4 bits available for the opcode. He writes the calculation 2^4 = 16 to determine the number of supported 3-address instructions. This final step visually confirms that as the number of addresses increases, the number of possible unique instructions decreases drastically. The instructor uses red ink throughout to highlight the bit allocations and final numerical answers, ensuring the logic is easy to follow for students reviewing the material.

This educational segment effectively teaches the method for calculating instruction set size in a hypothetical machine architecture. The core principle demonstrated is that the total instruction length is a fixed resource shared between the opcode and address fields. By subtracting the bits required for addresses from the total 16 bits, the remaining bits determine the opcode size. The video systematically works through 1-address, 2-address, and 3-address formats, showing the resulting opcode capacities of 4096, 256, and 16 respectively. This progression highlights the trade-off inherent in instruction set design: more addresses per instruction mean fewer distinct operations the processor can perform. The visual diagrams and step-by-step calculations provide a concrete example of these abstract architectural concepts.

Loading lesson…