Practice Question - 1

Duration: 2 min

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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.

This lecture segment presents a practice problem on fully associative mapped cache memory organization. The instructor analyzes a scenario with 16 KB cache size, 256 bytes block size, and 128 KB main memory. The core task is determining the number of tag bits and total tag directory size. The instructor decomposes the physical address into Block Number (Tag) and Block Offset fields, calculating 8 bits for offset based on block size. For fully associative mapping, the entire Block Number becomes the Tag since there is no index field.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces a fully associative cache problem with on-screen text stating 'Q Consider a fully associative mapped cache of size 16 KB with block size 256 bytes.' The main memory is specified as 128 KB. He calculates the Block Offset bits as 8 (since log2(256) = 8). He writes '14' initially, likely referring to total cache lines or address bits, then corrects to '6' for Cache Line bits (log2(16KB/256B) = log2(64) = 6). The diagram shows Main Memory (Physical Address) split into Block Number and Block Offset, with Tag = Block Number.

  2. 2:00 – 2:07 02:00-02:07

    The instructor finalizes the address breakdown showing 17 total physical address bits. He explicitly writes 'Block Number 9' and 'Block Offset 8', confirming Tag = Block Number is 9 bits. He computes the tag directory size using the formula 2^6 x 9, where 2^6 represents the number of cache lines (64) and 9 is the tag bits per line. The screen displays 'Find out the: Number of bits in tag and Tag directory size?' as the final question to be answered.

The video demonstrates a standard method for solving fully associative cache problems. Key steps include calculating block offset from block size, determining the number of cache lines to find tag bits (since index is zero in fully associative), and computing directory size. The instructor emphasizes that Tag equals Block Number in this mapping scheme, distinguishing it from direct or set-associative mappings where an index field exists. The final calculation of 2^6 x 9 illustrates how directory size scales with the number of lines and tag width.

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