Process Control Block

Duration: 5 min

This video lesson is available to enrolled students.

Return to /learn/DSSSB-TGT-COMPUTER-SCIENCE-PAPER-2/operating-system/process-management/process-basics-pcb/asset-process-control-block after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Programming, Data Structures, OOP & Java: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Java, OOPS with C++, Java Fundamentals, Array, String, IO & References, Language Design, Intro to Compilers, Visual Basics, Syntax Analysis: Bottom-Up, Object Oriented Technology
  3. Computer Networks, TCP/IP & Network Security: Introduction to CN, Data Communication, DLL: Flow Control, DLL: Access Control, DLL: Error Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Access Technologies, Network Security, Society, Law & Ethics, Cloud Computing, Mobile Computing, Net Layer:Routing Protocol, Cyber Safety and Security
  4. Teaching Methodology: Child Development, Concept of Pedagogy, Theories, Inclusive Education, Experiential Pedagogy, Assessment & Evaluation, Curriculum Framework & Reforms, National Education Policy (NEP) 2020, Psychology, Teaching-Learning Process, Personality Development, Teaching Methods & Strategies, Learning and Motivation, Learners & Learning Process, Factors Affecting Teaching, Methods of Teaching, Nature, Objectives & Characteristics of Teaching, Teaching-Learning Aids & ICT Integration, Classroom Management & Communication, Evaluation, Assessment & Measurement, Curriculum & School Environment, Inclusive Education & Special Needs, Professional Development & Ethics
  5. Digital Electronics / Boolean Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Analog-Digital Conversion
  6. Operating Systems & Linux: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, File Management, Disc Scheduling, Unix OS, Linux OS, Distributed Systems, Windows OS
  7. Data Base Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, File Organization & Indexing, Transaction Management, Concurrency Control, Database Security & Authorization, Database Recovery, Data Warehousing & Mining
  8. Internet & Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, HTML Basics, CSS, Emerging Technologies, JavaScript-Basics, .Net Programming, Electronic Data Interchange and E-Commerce, XML
  9. Computer Fundamentals, IT Basics & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer, Terms & Abbreviations, MS Office Applications, Instr Formats & Modes, Floating Point Rep
  10. Python Language: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  11. Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, extras, Fundamentals of Systems and Information Systems
  12. Design & Analysis of Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  13. Mathematics - I, II, III, IV: Permutation and Combination, Logarithm, Linear Algebra, Algebra, Calculus, Trigonometry, Vectors, Set Theory, Functions, Relations, Propositional and Predicate Logic, Research Process Steps, Graph Theory
  14. Computer Graphics, Multimedia & Mobile Computing: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, 3-D Object Representation, Geometric Transformations and Viewing, Multimedia
  15. Emerging Trends: Emerging Tech Trends, Knowledge Representation, Natural Language Processing
  16. Statistical Techniques: Probability, Statistics
  17. Interpolation - DI: Data Interpretation
  18. Basis of Physics: Physics
  19. Previous Year Paper:
  20. Business Studies and Management: Business Communication, Business Organization and Management, Financial Accounting, Business Economics, Management Information System (MIS), Knowledge Management & New Economy
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The lecture introduces the Process Control Block (PCB) as the critical data structure used by operating systems to represent and manage processes. Often called a task control block, the PCB serves as a repository for all information that varies from process to process. The instructor details the specific fields contained within a PCB, explaining how they allow the OS to track process state, manage memory, and handle scheduling. Key components include process state, program counter, CPU registers, memory limits, and lists of open files. The discussion emphasizes the importance of saving this state information during interrupts to ensure processes can be resumed correctly.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor begins by defining the PCB, stating on the slide that "Each process is represented in the operating system by a process control block (PCB)." He explains it is a repository for information associated with a specific process. The slide lists fields such as "process state," "process number," "program counter," "registers," "memory limits," and "list of open files." He elaborates on "Process state," noting it can be new, ready, running, waiting, or halted. He defines "Program counter" as indicating the address of the next instruction to be executed. He starts discussing "CPU registers," mentioning they vary in number and type depending on the computer architecture, including accumulators and index registers.

  2. 2:00 – 5:00 02:00-05:00

    The instructor continues explaining "CPU registers," stating that along with the program counter, this state information must be saved when an interrupt occurs. The slide updates to show more detailed categories: "CPU-scheduling information," "Memory-management information," and "Accounting information." He explains that scheduling information includes process priority and pointers to scheduling queues. Memory-management information may include base and limit registers, page tables, or segment tables. Accounting information includes time used, time limits, and account numbers. He also mentions "I/O status information," which includes the list of open files and devices used. He gestures towards the slide, emphasizing how these fields allow the OS to manage resources effectively.

  3. 5:00 – 5:05 05:00-05:05

    The video concludes with the instructor reinforcing the structure of the PCB. The slide shows the "list of open files" and an ellipsis, indicating that the structure can contain additional fields. He summarizes that the PCB is essential for the OS to maintain the context of a process, allowing it to be paused and resumed without losing its state.

The lecture provides a comprehensive overview of the Process Control Block, moving from basic definitions to detailed field descriptions. By categorizing information into scheduling, memory management, and accounting, the instructor illustrates how the OS abstracts process details. This structure is fundamental for context switching and ensuring that multiple processes can run concurrently without interfering with each other's state.

Loading lesson…