Types of SDT

Duration: 3 min

This video lesson is available to enrolled students.

Return to /learn/NIACL-AO-IT-SPECIALIST/computer-architecture-it-specialist/semantic-analysis-sdt/attributes-sdt-types/asset-types-of-sdt after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. Quantitative Aptitude: Ratio and Proportion (Ratios), Data Interpretation, Mixture and Alligation, Permutation and Combination, Number System, Sequence and Series (Series), Speed Time and Distance, Speed Mathematics and Basic Mathematics, Algebra, Percentage, Profit and Loss, Simple Interest and Compound Interest, Powers and Exponents (Surds and Indices), Time and Work, Mensuration and Geometry, Partnership
  2. Reasoning Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Seating Arrangements, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Directions (Direction Test), Ranking, Order and Sequence, Syllogisms, Blood Relations, Puzzle Solving (Puzzles), Inequality, Machine Input-Output
  3. English Language: Vocabulary, Noun, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage), Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Construction, Pronoun, Preposition, Conjunction, Adverb, Verb, Modals, Articles, Determiner, Interjection
  4. General Awareness: Evolution of Indian Banking (Banking & Financial Awareness), GK- Current Affairs, Static General Knowledge, Indian Economy
  5. C Concepts + MCQs (IT Specialist): C Programming by Yash Sir, C Language Core
  6. Java (IT Specialist): Java
  7. Python (IT Specialist): Python for Placements by Yash Sir, Python Basics
  8. OOPs (IT Specialist): Object Oriented Programming (OOPS)
  9. DBMS (IT Specialist): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, ORDBMS, Database Security & Authorization, Query Processing & Optimization, Enhanced Data Models, Data Warehousing & Mining, Big Data Systems, NoSQL
  10. SQL (IT Specialist): SQL
  11. Software Engineering (IT Specialist): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  12. Data Structure (IT Specialist): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  13. Operating System (IT Specialist): Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Linux OS, Security, Distributed Systems, Virtual Machines
  14. Compiler Design (IT Specialist): 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
  15. Computer Architecture (IT Specialist): Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Multiprocessors, Programming the Basic Computer
  16. Data Communication & Networking (IT Specialist): Introduction to CN, Data Communication, 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, Network Security
  17. Descriptive Test (Main Exam): English Writing Ability
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This lecture segment provides a detailed comparison between S-Attributed and L-Attributes Syntax Directed Translation (SDT) schemes. The instructor utilizes a structured table to outline key differences regarding attribute types, semantic action placement, and evaluation mechanisms. S-Attributed SDT is characterized by the exclusive use of synthesized attributes, whereas L-Attributes SDT incorporates both inherited and synthesized attributes. The lecture clarifies that while S-Attributed SDT is evaluated during Bottom-Up Parsing, L-Attributes SDT requires a depth-first left-to-right traversal of the parse tree.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor presents a side-by-side comparison table for S-Attributed and L-Attributes SDT. He underlines the first row, noting S-Attributed uses only synthesized attributes, while L-Attributes uses both inherited and synthesized attributes. He specifically underlines the restriction for L-Attributes: inherited attributes must inherit from either the parent or the left sibling only. Moving to the third row, he explains semantic action placement. For S-Attributed, actions are at the extreme right end of the production. For L-Attributes, they can be placed anywhere on the right-hand side. He writes alpha -> a b [S] c on the screen to visualize this placement. Finally, he notes that S-Attributed attributes are evaluated during Bottom-Up Parsing (BUP).

  2. 2:00 – 2:45 02:00-02:45

    The discussion moves to the evaluation strategy for L-Attributes SDT. The instructor underlines the text: Attributes are evaluated by traversing parse tree depth first left to right. To clarify this, he draws a triangular diagram representing a parse tree. He sketches lines across the nodes of the triangle to demonstrate the traversal order. He emphasizes that unlike S-Attributed SDT which uses BUP, L-Attributes requires a specific depth-first traversal. He crosses out parts of his drawing to indicate the sequence of evaluation, reinforcing the concept that inherited attributes must be available before the node is processed.

The core distinction lies in attribute dependency and evaluation order. S-Attributed SDT is restricted to synthesized attributes evaluated bottom-up, making it suitable for simpler translations. In contrast, L-Attributes SDT allows inherited attributes but restricts their source to parents or left siblings, necessitating a depth-first traversal. This flexibility allows for more complex semantic analysis while maintaining a predictable evaluation order.

Loading lesson…