Practice Questions Language

Duration: 4 min

This video lesson is available to enrolled students.

Return to /learn/HPSC-PGT-COMPUTER-SCIENCE/theory-of-computation/deterministic-fa-dfa/dfa-construction-design/asset-practice-questions-language 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 lecture focuses on the analysis of Deterministic Finite Automata (DFA). The instructor begins by examining a specific DFA diagram to determine the language L(M) it accepts. He systematically traces paths and tests strings against the options provided. Later, the lecture transitions to a new problem involving a different DFA structure, where the instructor solves three multiple-choice questions related to defining final states for specific language conditions, such as strings starting and ending with the same symbol.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor analyzes a DFA with states $S_c$ (start), $S_1, S_2, S_6, S_7$. $S_6$ and $S_7$ are final states. He traces the path $S_c \xrightarrow{a} S_1 \xrightarrow{a} S_6$ to show 'aa' is accepted. He notes that once in $S_6$, any input ($a, b$) loops back, meaning 'aa' followed by anything is accepted. Similarly, $S_c \xrightarrow{b} S_2 \xrightarrow{b} S_7$ accepts 'bb' followed by anything. He tests option (a) 'words starting with aa or bb' by checking 'baa', which is accepted but doesn't start with 'aa' or 'bb', ruling it out. He tests 'abba', which is accepted, confirming it contains 'bb'. He concludes the correct answer is (c) 'words containing aa or bb as a sub word'.

  2. 2:00 – 4:06 02:00-04:06

    The slide presents a new DFA with states Start, $q_0, q_1, q_2, q_3$. Question 1 asks for final states to accept strings starting with 'a' and ending with 'b'. The instructor circles option (b) $q_1$. Question 2 asks which strings are accepted if $q_0$ and $q_1$ are final states. The strings are 1. ababab, 2. Babaaa, 3. aaaba. The instructor marks option (c) 1, 3. Question 3 asks for the set of accepting states for strings with the same starting and ending symbols. The options are a) $\{q_0\}$, b) $\{q_0, q_3\}$, c) $\{q_3\}$, d) $\{q_3, q_1\}$. The instructor circles option (b) $\{q_0, q_3\}$.

The lecture progresses from analyzing an existing DFA to identifying its language, to designing/analyzing DFAs for specific constraints. The first part establishes the concept of sub-words in regular languages. The second part applies DFA transition logic to define acceptance criteria based on string properties (start/end symbols). The instructor uses visual tracing and option elimination to guide the student through the problems.

Loading lesson…