Process State Diagram

Duration: 6 min

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Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Paper 1 | General Studies: State Wise GK
  3. Paper 1 | Information and Communication Technology: Role of Internet and Web Services, Security in Mobile and Wireless Computing
  4. Paper 1 | Current Affairs: GK- Current Affairs
  5. Paper 2 | Discrete Mathematical Structure: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Probability
  6. Paper 2 | Digital Computer Organization And Architecture: Number System, Number Representation, Sequential Circuits, Combinational Circuit, Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer
  7. Paper 2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  8. Paper 2 | Programming Languages & Object-Oriented Programming Concepts: Java, OOPS with C++, Java Fundamentals, Array, String, IO & References
  9. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  10. Paper 2 | Data Structure And Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Advanced Algorithms
  11. Paper 2 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS
  12. Paper 2 | Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  13. Paper 2 | Compiler Design: 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
  14. Paper 2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization, Enhanced Data Models
  15. Paper 2 | Computer Network And Information Security: Introduction to CN, Data Communication, Application Layer, Hardware basics, Cyber Threats and Malware Attacks, Network Security, 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
  16. Paper 2 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  17. Paper 2 | Current Trends & Technologies: Emerging Tech Trends, Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Planning, Multi Agent Systems, Fuzzy Sets, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms, Artificial Intelligence, Data Warehousing & Mining, Electronic Data Interchange and E-Commerce, Terms & Abbreviations
  18. Paper 2 | Full Length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video provides a comprehensive lecture on the Process State Diagram within the context of Operating Systems. The instructor systematically explains the lifecycle of a process, starting from the New state and progressing through Ready, Run, and Wait/Block states. A significant portion of the lecture is dedicated to explaining the Suspend states (Suspend Ready and Suspend Wait) and the concept of swapping processes out of main memory to secondary memory. The instructor uses a digital whiteboard to draw and annotate the state diagram, highlighting specific transitions like Schedule / Dispatch, I/O Request, and Resume. He also draws a supplementary diagram to visualize the interaction between the CPU, Main Memory (MM), and Secondary Memory (SM) during suspension, clarifying how processes are moved between memory levels.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The lecture begins with the fundamental states. The instructor points to the New state and the arrow labeled Schedule / Dispatch which moves a process to Ready. He then discusses the Run state, explaining that a process moves here from Ready via Schedule / Dispatch. He highlights the transition back to Ready caused by Priority / Time quantum or preemption, where the CPU time is exhausted. He also points out the I/O Request transition leading from Run to Wait / Block, indicating the process is waiting for an event like I/O completion. He emphasizes that while in Wait / Block, the process cannot run.

  2. 2:00 – 5:00 02:00-05:00

    The instructor introduces the concept of suspension to manage memory. He draws a diagram on the right side of the screen showing CPU, MM (Main Memory), and SM (Secondary Memory). He explains that to manage memory, processes in Ready or Wait/Block can be moved to Suspend Ready or Suspend Wait respectively. This is often called swapping out. He points to the Resume transitions that move processes back from Suspend Ready to Ready or from Suspend Wait to Wait / Block. He specifically notes the transition from Suspend Wait to Suspend Ready labeled I/O Completed but still in suspend, explaining that even if I/O is done, the process remains suspended until explicitly resumed.

  3. 5:00 – 5:41 05:00-05:41

    The lecture concludes with the final states. The instructor points to the Terminate state, which is reached from Run upon Completion. He summarizes the entire diagram, emphasizing the difference between a process waiting for I/O (blocking) and a process being moved to disk (suspending). He reinforces the idea that suspension is a mechanism to free up main memory resources for other processes. He gestures towards the Suspend Ready and Suspend Wait states to show they are distinct from the main memory states.

The video effectively breaks down the complex process state diagram into understandable segments. It starts with the basic lifecycle, moves to the critical concept of suspension and swapping, and concludes with the termination state. The visual aids, including the drawn CPU/MM/SM diagram, are crucial for understanding how memory management interacts with process states.

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