Multi Level Queue Scheduling

Duration: 5 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 detailed lecture on Multi Level-Queue Scheduling, a class of scheduling algorithms designed for situations where processes are easily classified into different groups. The instructor explains that a common division is made between foreground (interactive) processes and background (batch) processes, which have different response-time requirements and scheduling needs. The core concept involves partitioning the ready queue into several separate queues where processes are permanently assigned based on properties like memory size, process priority, or process type. The visual aid displays a hierarchy of queues, illustrating how the operating system manages these distinct groups to optimize system performance.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor begins by presenting a slide titled Multi Level-Queue Scheduling which outlines the fundamental definition of the algorithm. He reads from the text stating that the algorithm partitions the ready queue into several separate queues. He emphasizes that processes are permanently assigned to one queue, generally based on some property of the process, such as memory size, process priority, or process type. The slide text explicitly mentions the division between foreground (interactive) and background (batch) processes, highlighting that these two types have different response-time requirements. The instructor uses this text to set the stage for understanding how different process types are handled differently by the OS. The text on the screen is clearly legible, providing a solid reference for the lecture content.

  2. 2:00 – 4:55 02:00-04:55

    The instructor actively annotates the diagram on the slide to demonstrate specific scheduling policies. He writes RR (Round Robin) next to the top two queues labeled system processes and interactive processes, indicating that these interactive tasks use time-slicing. Conversely, he writes FCFS (First Come First Serve) next to the bottom queue labeled batch processes, suggesting a non-preemptive approach for background tasks. He further clarifies the priority structure by writing 3(H) next to the top queue and 1(L) next to the bottom queue, explicitly marking the highest and lowest priorities. He circles the queues and writes numerical values like TN=3, =2, and =1 to represent the priority levels, visually reinforcing the concept that higher priority queues are serviced before lower priority ones. The handwritten notes provide a clear visual guide to the scheduling logic.

The lecture effectively bridges the gap between theoretical definitions and practical implementation. By starting with the general definition of partitioning queues and then moving to specific annotations like RR and FCFS, the instructor clarifies how different scheduling algorithms are applied to different process groups. The visual hierarchy of system processes at the top and batch processes at the bottom, coupled with priority markings, provides a clear mental model for students to understand how operating systems prioritize critical tasks over background jobs. This progression from text to diagram annotation helps solidify the concept of multilevel queue scheduling.

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