Process State Diagram

Duration: 6 min

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Module outline

  1. English Comprehension/Verbal Ability: Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Vocabulary, Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Subject Verb Agreement (Verb Noun Agreement), Tenses, Verb, Articles, Preposition, Conjunction, Pronoun, Noun, Adjectives, Adverb, Modals, Cloze Test (Cloze Passage), Active Passive Voice (Voice), Direct and Indirect Speech, Sentence Construction
  2. Logical Ability: Coding Decoding, Directions (Direction Test), Analogy, Inequality, Data Sufficiency, Series (Number and Letter Series) (Numerical Relations and Reasoning), Syllogisms, Seating Arrangements, Puzzle Solving (Puzzles), Blood Relations, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Ranking, Order and Sequence, Logical Sequence Of Words, Data Arrangement, Venn Diagram, Calendar, Clock
  3. Quantitative Ability: Logarithm, Permutation and Combination, Probability, Profit and Loss, Speed Time and Distance, Mixture and Alligation, Partnership, Simple Interest and Compound Interest, Percentage, Ratio and Proportion (Ratios), Average, Time and Work, Pipe and Cistern, Number System, Divisibility Rules, HCF LCM, Algebra, Powers and Exponents (Surds and Indices), Mensuration and Geometry, Age Problems, Data Interpretation, Sequence and Series (Series)
  4. Basic Analytical Ability: Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Cubes & Dices, Selection Decision Table (Decision Making)
  5. Computer Programming: Pseudo Codes, Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir
  6. DBMS (Computer Science): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Transaction Management, Concurrency Control, Database Security & Authorization
  7. SQL (Computer Science): SQL
  8. OS (Computer Science): Introduction to OS, Process Management, CPU Scheduling, Deadlock, Process Synchronization, Threads & Process Creation, Memory Management, Virtual Memory, File Management
  9. Computer Networks (Computer Science): 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
  10. Data Structures (Computer Science): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  11. OOPs (Computer Science): Object Oriented Programming (OOPS)
  12. Software Engineering (Computer Science): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  13. SVAR Conversational - Spoken English: Communication Assessment
  14. HR Interview: MR & HR Interview Preparation
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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