Page Table in Paging
Duration: 4 min
This video lesson is available to enrolled students.
Inside: a video lesson and guided study material.
Module outline
- Quantitative Aptitude: Number System, Percentage, Profit and Loss, Ratio and Proportion (Ratios), Average, Time and Work, Speed Time and Distance, Simple Interest and Compound Interest, Mixture and Alligation, Data Interpretation, Permutation and Combination, Probability, Logarithm, Powers and Exponents (Surds and Indices), Age Problems, Divisibility Rules, Partnership, HCF LCM, Algebra, Pipe and Cistern
- Logical Reasoning: Series (Number and Letter Series) (Numerical Relations and Reasoning), Analogy, Coding Decoding, Blood Relations, Directions (Direction Test), Syllogisms, Logical Sequence Of Words, Data Sufficiency, Seating Arrangements, Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Data Arrangement
- English Language: Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Vocabulary, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Active Passive Voice (Voice), Direct and Indirect Speech, Cloze Test (Cloze Passage), Tenses, Subject Verb Agreement (Verb Noun Agreement), Preposition, Articles, Conjunction, Adverb
- Written English Test: English Writing Ability
- Coding: Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir
- Communication Round: Communication Assessment
- DBMS (Technical Interview): 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, Big Data Systems, NoSQL, Data Warehousing & Mining
- SQL (Technical Interview): SQL
- Operating Systems (Technical Interview): 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
- Computer Networks (Technical Interview): 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
- OOPs (Technical Interview): Object Oriented Programming (OOPS)
- HR Interview: MR & HR Interview Preparation
AI summary & chapters
AI Summary
An AI-generated summary of this video lecture.
The video lecture focuses on the concept of a Page Table in Operating Systems. The instructor systematically breaks down five key characteristics of page tables using a slide presentation titled 'Page Table'. He clarifies that a page table is a data structure, not hardware, and that every process maintains its own separate page table. He explains the relationship between the number of entries in the table and the number of pages a process has in secondary memory. Furthermore, he details that each entry's size corresponds to the frame number and that the page table itself is stored in main memory. Throughout the lecture, he uses diagrams to visualize how page tables map logical addresses to physical frames, ensuring students grasp both the theoretical and structural aspects of memory management.
Chapters
0:00 – 2:00 00:00-02:00
The instructor begins by listing five points about Page Tables on a slide. He validates points 1 and 2 with checkmarks, stating 'Page table is a data structure not hardware' and 'Every process have a separate page table.' He moves to point 3, explaining that the number of entries equals the number of pages in secondary memory. He underlines 'corresponding frame number' in point 4. He then starts drawing a diagram on the screen, sketching two vertical rectangles to represent page tables and writing numbers like '1000' and '50' to illustrate entries. He gestures towards the screen while explaining the mapping concept.
2:00 – 4:18 02:00-04:18
The instructor elaborates on the diagram he started drawing. He draws a larger rectangle representing the page table structure and adds internal divisions. He writes '1000' and '50' again, likely indicating page numbers or frame indices. He draws arrows connecting the page table entries to memory frames to demonstrate the mapping process. He circles a specific section of the diagram to emphasize how a specific entry maps to a frame. He reiterates that the page table is a data structure stored in main memory, reinforcing point 5 from the slide. He concludes by ensuring the students understand that the page table itself resides in main memory, which is a critical concept for virtual memory systems.
The lecture systematically defines the Page Table as a crucial data structure for memory management. By combining textual definitions with visual diagrams, the instructor clarifies that page tables are process-specific, stored in main memory, and map logical pages to physical frames. The progression from theoretical points to practical diagrammatic representation helps students understand the structural and functional aspects of page tables in an OS environment. The instructor's use of checkmarks and underlines on the slide emphasizes the correctness of the statements, while the hand-drawn diagrams provide a concrete visualization of abstract memory mapping concepts. This comprehensive approach ensures a deep understanding of how operating systems handle memory allocation.