Associative Mapping part-1

Duration: 5 min

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Module outline

  1. General Intelligence & Reasoning: Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Logical Sequence Of Words, Syllogisms, Venn Diagram, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Data Sufficiency, Puzzle Solving (Puzzles), Data Arrangement, Cubes & Dices, Calendar, Clock, Arithmetic, Number System, HCF LCM, Verbal Analogy (Word Based Analogy), Visual Recognition and Figure Completion, Paper Folding and Cutting, Transformation of Shapes, Clocks and Calendars, Direction Sense, Cubes and Dice, Patterns in Two-Dimensional Figures, Seating Arrangements, Analogy and Classification, Logical Deduction and Induction, Alphabet and Word Tests, Mathematical Operations, Series Completion, Simplification and Approximation, Coding and Decoding, Numerical Reasoning, Assembling and Grouping of Shapes, Three-Dimensional Patterns and Visualization, Vocabulary, Number System, Averages, Mixtures and Alligation, Simple and Compound Interest, Percentages, Algebra, Speed, Time and Distance, Seating and Arrangement Puzzles, Traverse Surveying, Order, Ranking and Sequence, Constraint Puzzles, Syllogisms and Venn Diagrams, Reading Comprehension, Critical Reasoning, Permutations and Combinations, Narrative Sequencing, Project Monitoring, Resources and Safety, Profit, Loss and Discount, Ratio and Proportion, Time and Work, Mensuration, Data Interpretation, Powers, Surds and Logarithms, Sequences and Series, Articles and Determiners, Sentence Completion, Data Sufficiency, Blood Relations, Simple Interest and Compound Interest, Mixture and Alligation, Sequence and Series (Series), Speed Time and Distance, Algebra, Profit and Loss, Powers and Exponents (Surds and Indices), Permutation and Combination
  2. General Awareness: Physics, Chemistry, Biology, History, Geography, Polity, Indian Economy, Environment, Static General Knowledge, GK- Current Affairs, Artificial Intelligence, MS Office Applications, Terms & Abbreviations, Keyboard Shortcuts, Evolution of Indian Banking (Banking & Financial Awareness), Emerging Tech Trends
  3. Engineering Mathematics: Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Linear Algebra, Calculus, Probability, Statistics, Signal Space and Optimum Detection, Probability, Statistics
  4. Digital Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Floating Point Rep, Number Systems and Codes, Registers and Counters, Boolean Algebra and Logic Gates, Microprocessors and Microcontrollers, Logic Families and CMOS Logic, Microprocessors, Logic Gates and Boolean Algebra, Minimization of Boolean Functions, Timing, Hazards and Testing, Logic Families, Combinational Logic Design, Arithmetic Circuits, Waveform Generators and Timer Circuits, Semiconductor Memories and Programmable Logic Devices, Combinational Logic Circuits, Latches and Flip-Flops, Finite State Machines, Sequential Circuits and State Machines, Minimization of Boolean Functions, Arithmetic Circuits, Latches and Flip-Flops, Number Systems and Codes, Registers and Counters
  5. Computer Organisation & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer, Register Transfer and Microoperations, Semiconductor Memories and Programmable Logic, Processor Organization and Instructions, Memory Hierarchy and Input/Output, Registers and Counters
  6. Programming & Data Structures: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, HTML Basics, OOPS with C++, Java, Object Oriented Technology
  7. Databases: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization
  8. Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  9. Theory of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  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. Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Security, Windows OS, Distributed Systems, Unix OS, Linux OS
  12. Computer Networks: Introduction to CN, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware Basics, Data Communication, Website, Browser & Services, Web Design & Development, Network Security, Cyber Threats and Malware Attacks, Cyber Safety and Security
  13. Full Length Mock Tests:
  14. Sectional Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The lecture introduces Associative Mapping as a solution to conflict misses in direct mapping. It allows any main memory block to map to any cache line, offering high flexibility. The instructor uses diagrams to illustrate the 'many-to-many' relationship and explains the address structure where the block number becomes the tag. This method ensures that a block is only evicted if the cache is completely full, unlike direct mapping where conflict misses are common. The video is presented by Sanchit Jain Sir from Knowledge Gate.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor begins the lecture with a slide titled 'Associative Mapping'. He explains that this technique is specifically designed to overcome the 'conflict-miss' problem that occurs in direct mapping. The slide text states that a block of main memory can be mapped to any freely available cache line, which makes fully associative mapping significantly more flexible than direct mapping. He notes that this approach is also known as 'many to many mappings'. To illustrate this, he draws red arrows on the screen, showing that blocks labeled B-0 through B-15 can potentially map to any of the cache lines CL-0 through CL-3. He specifically highlights an example where block B-8 is mapped to cache line CL-2, demonstrating that there is no fixed position for a block in the cache, unlike in direct mapping. The watermark 'KN' is visible on the right side.

  2. 2:00 – 4:42 02:00-04:42

    The lecture transitions to a detailed table comparing 'Cache Memory' and 'Main Memory'. The instructor explains that in this mapping scheme, the 'TAG' field in the cache line stores the 'Block no'. He points out that the entire block number acts as the tag because the cache line is not determined by the address bits. A diagram of the 'Main Memory (Physical Address)' is shown with a green bar, breaking it into 'Block Number' and 'Block Offset'. Below this, the cache address structure is shown with an orange bar, labeled 'Tag', 'Cache Line', and 'Block Offset'. The instructor clarifies that in fully associative mapping, the 'Cache Line' part of the address is effectively zero or irrelevant for indexing, meaning the whole block number is used as the tag. He draws lines connecting cache lines to main memory blocks to visually reinforce the 'many-to-many' concept, showing that any block can reside in any line. He specifically points to block B-13 in the main memory table and shows it mapping to CL-2 in the cache table, reinforcing the flexibility of the mapping. The 'Knowledge Gate' logo is visible.

The video provides a comprehensive overview of Associative Mapping in computer architecture. It starts by identifying the problem of conflict misses in direct mapping and presents associative mapping as the flexible solution where any memory block can occupy any cache line. The instructor then details the technical implementation, explaining that the block number serves as the tag in the cache. By analyzing the physical address structure, he demonstrates how the address bits are partitioned differently compared to direct mapping, emphasizing that the lack of a fixed index allows for maximum flexibility in data placement. This method ensures that a block is only evicted if the cache is completely full, unlike direct mapping where conflict misses are common.

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