Practice question on B Tree Insertion

Duration: 8 min

This video lesson is available to enrolled students.

Return to /learn/COGNIZANT-PREPARATION/dbms/file-organization-indexing/b-trees-b-trees-structure-insertion/asset-practice-question-on-b-tree-insertion after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. Communication Round: Vocabulary, Subject Verb Agreement (Verb Noun Agreement), 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), Direct and Indirect Speech, Active Passive Voice (Voice), Verbal Analogy (Word Based Analogy), Articles, Preposition, Conjunction, Sentence Construction, English Writing Ability, Communication Assessment
  2. Quantitative Aptitude: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Speed Time and Distance, Percentage, Average, Powers and Exponents (Surds and Indices), Time and Work, Mensuration and Geometry, Age Problems, Pipe and Cistern, Probability, Profit and Loss, Simple Interest and Compound Interest, Algebra
  3. Analytical and Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Directions (Direction Test), Ranking, Order and Sequence, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Logical Sequence Of Words, Puzzle Solving (Puzzles), Syllogisms, Seating Arrangements, Calendar, Clock, Blood Relations, Cubes & Dices, Venn Diagram, Analytical Reasoning (Counting Figures Reasoning)
  4. Cognizant Gaming Aptitude: Gamified / Game Based Aptitude
  5. Java (Cluster 1): Java
  6. ANSI SQL MySQL (Cluster 1,2,3): SQL
  7. HTML, CSS, JavaScript (Cluster 1,3): HTML, CSS, JavaScript
  8. Python (Cluster 2): Python for Placements by Yash Sir
  9. Cloud Fundamentals (Cluster 2): Emerging Tech Trends
  10. C# (Cluster 3): C#
  11. OOPs: Object Oriented Programming (OOPS)
  12. Technical Assessment (Coding): Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Pseudo Codes
  13. Data Structures: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  14. DBMS: 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
  15. Operating Systems: 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
  16. 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, Network Security, Mobile Technology, Cloud Computing and IoT, Cyber and Info Security
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video provides a detailed walkthrough of inserting a sequence of integers into an empty B-tree of order 5. The problem statement lists the elements: 5, 10, 12, 13, 14, 1, 2, 4, 20, 18, 19, 17, 16, 15, 25, 23, 24. The instructor defines the order m=5, which dictates that a node can hold a maximum of m-1=4 keys. The core mechanism demonstrated is the split operation: whenever a node accumulates 5 keys, it splits into two nodes, and the middle key is promoted to the parent. This process is repeated until the tree is balanced. The lecture covers multiple levels of splitting, including root splits, to maintain the B-tree properties.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor starts by writing the problem statement on the screen in orange text. He explicitly writes 'm=5' and 'd m-1=4' in red ink to establish the constraints. He begins inserting the first batch of numbers: 5, 10, 12, 13, 14. He draws a single box containing these five numbers. Since the limit is 4, he identifies an overflow. He circles the middle element, 12, and draws an arrow pointing upwards to indicate promotion. He then draws a new root node containing 12. Below it, he draws two child nodes: one containing [5, 10] and the other containing [13, 14]. This establishes the initial two-level structure of the tree.

  2. 2:00 – 5:00 02:00-05:00

    Next, the instructor inserts 1, 2, and 4. He places them into the leftmost leaf node [5, 10], resulting in the sequence [1, 2, 4, 5, 10]. This node now has 5 keys, so he performs a split. He identifies 4 as the middle element and promotes it to the root. The root, previously just 12, now becomes [4, 12]. The children of 4 are [1, 2] and [5, 10]. The instructor then moves to the right side, inserting 20, 18, and 19 into the node [13, 14]. The node becomes [13, 14, 18, 19, 20]. Another split occurs. The middle element 18 is promoted to the root. The root updates to [4, 12, 18]. The children of 18 are [13, 14] and [19, 20].

  3. 5:00 – 7:40 05:00-07:40

    The instructor continues with 17, 16, and 15. He inserts them into the node [13, 14], making it [13, 14, 15, 16, 17]. This triggers a split where 15 is promoted to the root. The root becomes [4, 12, 15, 18]. The children of 15 are [13, 14] and [16, 17]. Then he inserts 25, 23, and 24 into the rightmost node [19, 20]. The node becomes [19, 20, 23, 24, 25]. A split occurs, promoting 23 to the root. The root becomes [4, 12, 15, 18, 23]. This is 5 keys, so the root overflows. He splits the root, promoting 15 to a new single-element root. The final tree has 15 at the top, with left child [4, 12] and right child [18, 23], and their respective subtrees are arranged accordingly.

The video systematically builds a B-tree, illustrating how insertions can cascade upwards. The critical concept is the split rule: a node with m keys splits, promoting the median. This ensures the tree remains balanced. The instructor visually demonstrates each step, drawing boxes for nodes and arrows for pointers, making the abstract concept of B-tree insertion concrete. The final structure shows a balanced tree with a root of 15, ensuring efficient search, insertion, and deletion operations.

Loading lesson…