Practice Questions Language

Duration: 4 min

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Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Paper-2 | 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
  3. Paper-2 | Databases / DBMS & SQL: 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
  4. Paper-2 | Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  5. Paper-2 | Computer Networks & Security: 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 Access Technologies, Network Security
  6. Paper-2 | Digital Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Floating Point Rep
  7. Paper-2 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management
  8. Paper-2 | 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
  9. Paper-2 | Computer Organization & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer
  10. Paper-2 | 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. Paper-1 | General Awareness: Polity, Physics, Biology, Chemistry, Static General Knowledge, GK- Current Affairs, History, Geography, Indian Economy, Environment
  12. Paper-1 | Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Data Interpretation, Blood Relations, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Clock, Calendar, Cubes & Dices, Directions (Direction Test), Analogy, Seating Arrangements, Analytical Reasoning (Counting Figures Reasoning)
  13. Paper-1 | Quantitative Aptitude: Ratio and Proportion (Ratios), Mixture and Alligation, Permutation and Combination, Number System, HCF LCM, Speed Time and Distance, Average, Age Problems, Percentage, Profit and Loss, Time and Work, Pipe and Cistern, Simple Interest and Compound Interest, Powers and Exponents (Surds and Indices), Mensuration and Geometry, Probability, Statistics, Arithmetic, Algebra
  14. Paper-1 | English: Vocabulary, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Construction, Cloze Test (Cloze Passage)
  15. Coal India Previous Year Paper:
  16. Engineering Mathematics: Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Linear Algebra, Calculus
  17. Coal India Mock Test:
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.

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