Internal Fragmentation

Duration: 3 min

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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.

This educational video provides a detailed explanation of internal fragmentation within the context of operating system memory management. The instructor begins by presenting a formal definition on the screen, stating that internal fragmentation occurs when a fixed-size partition is allocated to a process. He clarifies that if the partition size is equal to or larger than the process request, any remaining unused space inside that specific partition is termed internal fragmentation. To make this concept concrete, he employs a real-world analogy involving dining tables and then moves to a technical demonstration on a digital whiteboard.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The lecture commences with the instructor standing beside a slide displaying the definition of internal fragmentation. The text explicitly states that this phenomenon is a function of fixed-size partitions. The instructor elaborates that when a partition is allocated to a process, if the partition is either the same size or larger than the request, the unused space by the process in the partition is called internal fragmentation. He then transitions to a visual analogy, showing a photograph of a long dining table set for a formal event. He points out that if a small group of people sits at this large table, the empty space around them represents wasted capacity. He further displays a diagram comparing circular tables with capacities of 2, 4, 8, and 10 seats against rectangular tables.

  2. 2:00 – 3:23 02:00-03:23

    The instructor moves to a whiteboard to illustrate the concept mathematically and visually. He draws a long horizontal rectangle representing a block of memory and divides it into several sections. He labels these sections with numbers such as 2, 3, 4, 5, and 8, likely representing partition sizes. He then draws a smaller rectangle below to represent a process. He explains a scenario where a process is allocated a partition that is larger than its actual size. He circles the unused portion of the partition to highlight the fragmentation. In a subsequent example, he draws a partition labeled 20 and a process labeled 10, demonstrating that the difference represents the internal fragmentation.

The video successfully transitions from a textual definition to a relatable analogy and finally to a technical diagram. The instructor uses the dining table analogy to help students visualize the concept of wasted space in fixed partitions. The whiteboard demonstration reinforces this by showing specific numerical examples, making the abstract concept of memory management tangible. The progression ensures that students understand not just the definition, but also the practical implications of internal fragmentation.

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