Introduction To Link List

Duration: 6 min

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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 begins by critiquing the use of arrays for data storage, highlighting their static nature and the inefficiency of insertions and deletions. It then transitions to linked lists as the solution, defining them as linear collections of nodes connected via pointers. The instructor details the internal structure of a node, consisting of data and a next pointer, and explains the role of the head pointer in accessing the list. The lesson concludes by defining null pointers for list termination and empty lists, finishing with a C struct implementation of a node.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor discusses the disadvantages of arrays using a slide titled "Problem with array / Stack / Link List". He underlines key phrases in red ink, specifically "static structures" and "cannot be easily extended or reduced to fit the data set". The text notes that arrays "suffer from both internal and external fragmentation". A second point underlined is that "Arrays are also expensive to maintain new insertions and deletions". Below the text, a diagram of an array is shown with indices labeled 0 through 7, illustrating the fixed size structure being discussed. The instructor emphasizes that resizing is difficult and mentions fragmentation issues.

  2. 2:00 – 5:00 02:00-05:00

    The topic shifts to "Solution is link list". The slide defines a linked list as a "linear collection of data elements called nodes, where the linear order is given by the means of pointers". The instructor underlines "linear order" and "means of pointers". He explains that each node has two parts: an "information part" containing data and a "linked field or next pointer field" containing the address of the next node. A diagram shows nodes labeled H, E, A, P connected by arrows, ending in "null". The instructor draws a box labeled "Data" with an arrow to visualize the node structure. He underlines "two parts" and "contains data". The diagram includes a "head" arrow pointing to the first node H.

  3. 5:00 – 5:58 05:00-05:58

    The lecture details pointer mechanics. The text states the last node's pointer contains a "null pointer, which is an invalid address (0 or negative value)". The instructor underlines "null pointer" and "invalid address". He explains the "list pointer variable called start/first/head" which holds the address of the first node. He writes "head -> null" to represent an empty list. Finally, a C code snippet appears: `struct node { int data; struct node *next; };`, showing the implementation of the node structure discussed. He circles `int data` and `struct node *next`. The text also mentions "A special case is the list that has no nodes, such a list is called null list or empty list".

The video effectively contrasts the rigidity of arrays with the flexibility of linked lists. It moves from theoretical problems to structural definitions, explaining how pointers replace indices to manage data. The progression from problem identification to structural definition and finally to code implementation provides a complete conceptual overview of linked lists, ensuring students understand both the 'why' and the 'how' of this data structure.

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