Designing LL(1) Parser Part-3

Duration: 6 min

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Inside: a video lesson and guided study material.

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:
  15. Paper 2 - Full-length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video is a lecture on compiler design, specifically focusing on LL(1) parsing. The instructor begins by reviewing the FIRST and FOLLOW sets for a given grammar, which is visible on the left side of the board. He then demonstrates the parsing process using the input string `id + id * id` by constructing a parse tree step-by-step. The lecture progresses from theoretical set calculations to practical application, showing how grammar rules are applied to match input tokens.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a view of a whiteboard containing compiler design notes. On the left, a grammar is listed: `E -> E + T / T`, `T -> T * F / F`, `F -> (E) / id`. Below the grammar, the instructor has calculated FIRST and FOLLOW sets. Visible text includes `F(E) = { (, id }`, `Fol(E) = { $, ) }`, `F(E') = { +, e }`, `F(T) = { (, id }`, `F(T') = { *, e }`, and `F(F) = { *, +, $ }`. He points to a large red grid representing the LL(1) parsing table. The rows are labeled E, E', T, T', F and columns are +, *, (, ), id, $. He mentions the table dimensions are `m x (n+1)`. He is explaining how to populate this table using the sets. Specific productions like `E -> TE'` are visible in the `(` and `id` columns. `E' -> +TE'` is in the `+` column. `E' -> e` is in the `)` and `$` columns. `T -> FT'` is in `(` and `id`. `T' -> *FT'` is in `*`. `T' -> e` is in `+`, `)`, `$`. `F -> (E)` is in `(`. `F -> id` is in `id`. The instructor's name "Sanchit Jain Sir" is visible at the bottom left.

  2. 2:00 – 5:00 02:00-05:00

    The instructor begins a practical example. He writes the input string `id + id * id` at the top right. He starts drawing a parse tree below the table using blue ink. He begins with the root `E`. He draws branches for `T` and `E'` based on the production `E -> T E'`. He expands `T` into `F` and `T'`. He expands `F` into `id`. He draws an arrow from the leaf `id` to the first token of the input string. He then looks at the next token `+` and expands `E'` into `+ T E'`. He expands the new `T` into `F T'` and `F` into `id`, matching the second token. He then sees `*` and expands `T'` into `* F T'`. He expands `F` into `id`, matching the third token. He continues to expand the remaining non-terminals. He draws the tree structure carefully, showing the hierarchy of the grammar rules. He uses arrows to link the input string tokens to the corresponding leaves in the tree. The tree has multiple levels, with `E` at the top and terminals at the bottom.

  3. 5:00 – 5:48 05:00-05:48

    The instructor completes the parse tree. He expands the final `T'` and `E'` into epsilon (`e`) to handle the end of the string `$`. He draws the final branches and leaves. He puts a blue checkmark next to the input string `id + id * id` to signify that the string is successfully parsed by the grammar. He gestures with his hands to emphasize the structure of the tree. The video ends with the completed parse tree visible on the board. The tree shows the derivation of the expression. The leaves of the tree, read from left to right, form the input string.

The lecture progresses from theoretical set calculations to practical application. The instructor first establishes the necessary FIRST and FOLLOW sets for a standard arithmetic grammar. He then uses these sets to guide the construction of an LL(1) parsing table. Finally, he demonstrates the parsing algorithm by manually constructing a parse tree for the expression `id + id * id`, showing how the grammar rules are applied step-by-step to match the input tokens. The visual progression from the table to the tree illustrates the parsing process clearly.

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