Practice Question-2 (BFS)

Duration: 2 min

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Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. 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
  3. Paper 2 | Computer Organization And Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Control Unit Design, Instr Formats & Modes, Programming the Basic Computer
  4. Paper 2 | Analog And Digital Communication: Introduction to Communication Systems & Random Signals, Analog Communication Systems, Information Theory & Digital Communication Fundamentals, Digital Modulation & Detection Techniques, Error Control, Synchronization & Multiple Access Techniques
  5. Paper 2 | Programming in C: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  6. Paper 2 | Data Structures And Programming: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Java, OOPS with C++, Java Fundamentals, Array, String, IO & References
  7. Paper 2 | Algorithms: Algorithm Analysis, Sorting Algorithms, Time Complexity Analysis, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  8. 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
  9. 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, Unix OS, Linux OS
  10. Paper 2 | Databases: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Relational Calculus, File Organization & Indexing, Transaction Management, Concurrency Control
  11. Paper 2 | Information Systems and Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  12. Paper 2 | Computer Networks: 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
  13. Paper 2 | Internet & Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, Emerging Technologies, HTML Basics, JavaScript-Basics, CSS, XML, HTML5
  14. Paper 2 | Cyber Security And Emerging Technologies: Emerging Tech Trends
  15. Paper 2 | Cloud Technology: Cloud Computing
  16. Paper 2 | Probability and statistics: Probability, Statistics
  17. Paper-1 English: Vocabulary, Preposition, Articles, 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), Cloze Test (Cloze Passage), Sentence Construction
  18. Paper 1 General Mental Ability & Logical reasoning: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Percentage, Average, Powers and Exponents (Surds and Indices), Algebra, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Pipe and Cistern, Mensuration and Geometry, Mental Ability, Age Problems, Partnership, Arithmetic, Speed Mathematics and Basic Mathematics, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Blood Relations, Directions (Direction Test), Analytical Reasoning (Counting Figures Reasoning), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Selection Decision Table (Decision Making), Logical Sequence Of Words, Venn Diagram, Analogy
  19. Paper-1 General Knowledge & Current Affairs: State Wise GK, History, Geography, GK- Current Affairs, Static General Knowledge
  20. Full Length Mock Test:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video segment addresses a GATE-2017 multiple-choice question on Breadth First Search (BFS) traversal. The problem requires identifying a valid node visiting order for a specific graph using a queue data structure. Four options are presented: MNOPQR, NQMPOR, QMNROP, and POQNMR. The instructor systematically evaluates each sequence against the graph's connectivity rules inherent to BFS, which mandates layer-by-layer exploration. By analyzing adjacency and queue behavior, the instructor eliminates incorrect options (a, b, c) based on violations of traversal logic. The session concludes by validating option (d), POQNMR, as the correct sequence that satisfies the BFS constraints for the given graph structure.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video introduces a GATE-2017 problem asking for a possible BFS visiting order using a queue. Visible text displays the question: 'Which one of the following is a possible order of visiting the nodes in the graph above?' alongside options (a) MNOPQR, (b) NQMPOR, (c) QMNROP, and (d) POQNMR. The instructor begins analyzing the graph structure involving nodes M, N, O, P, Q, R. Evidence includes on-screen text highlighting 'Breath First Search (BFS) has been implemented using queue data structure' and the specific graph nodes listed. The instructor focuses on checking adjacency list orders to verify if sequences respect BFS layer-by-layer traversal properties.

  2. 2:00 – 2:17 02:00-02:17

    In the final segment, the instructor completes the evaluation of the BFS options. The visible evidence shows the instructor crossing out incorrect answers (a, b, and c) while validating option (d). The text on screen confirms the graph nodes M, N, Q, R, O, P. The instructor selects option (d) POQNMR as the correct answer because it aligns with queue-based traversal logic. This conclusion is drawn from eliminating impossible node sequences that violate the connectivity rules of the provided graph.

The lecture segment effectively demonstrates the application of Breadth First Search (BFS) traversal logic through a specific GATE-2017 examination problem. The core concept tested is the strict adherence to queue-based, layer-by-layer node visitation in graph theory. The instructor's method involves verifying each multiple-choice option against the graph's adjacency constraints, ensuring that neighbors are visited before their children. By systematically eliminating options (a), (b), and (c) due to logical inconsistencies with the graph structure, the instructor isolates option (d), POQNMR, as the only valid sequence. This approach reinforces the importance of understanding queue mechanics in BFS algorithms for solving traversal problems.

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