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CIT315

Operating System

  • Sciences
  • 300 level
  • 3 credit units
  • 184 pages
  • 14 units

This course introduces the principles of operating systems, serving as a liaison between computer users and hardware. It explores process management, concurrency, and synchronization, including race conditions and deadlocks. The course also covers memory management schemes, algorithms, and techniques for resource allocation and memory addressing. Students will gain knowledge of process states, context switching, interrupt handling, multithreading, and memory management strategies, equipping them with a comprehensive understanding of operating system concepts and their practical applications.

About this course

Difficulty
Intermediate
Study hours
208 hours
Maths
Basic
Content
Theoretical, problem solving, case study
Practical work
No
Before you start
  • Basic computer architecture
  • Data structures and algorithms
  • Programming in C/C++
How it is assessed
  • Assignments
  • Tutor marked assessments
  • Final examination

One paragraph, so you can see how it reads

CIT315 · Unit 1: Processes and States

All multiprogramming operating systems, from single-user systems such as Windows to mainframe systems such as IBM’s mainframe operating system, which can support thousands of users, are built around the concept of the process.

What you should be able to do

  1. Explain process states and transitions.
  2. Implement multithreading in user, kernel, and hybrid levels.
  3. Resolve race conditions and deadlocks using semaphores and monitors.
  4. Describe memory swapping and partitioning techniques.
  5. Understand virtual memory concepts and solve memory allocation issues.
  6. Analyze caching and thrashing issues and apply replacement policies.

What it prepares you for

Careers
  • System Administrator
  • Operating System Developer
  • Software Engineer
  • Cloud Computing Engineer
  • Embedded Systems Engineer
Where it is applied
  • Cloud Computing
  • Embedded Systems
  • Mobile Computing
  • Data Centers
  • Enterprise Software Development
Tools
  • Operating System Simulators
  • Debuggers
  • Compilers

Where it gets hard

The units students slow down on, and what makes each one heavy.

  • Module 3: Process Synchronization

    Unit 2: Deadlocks

    Understanding the conditions for deadlock and implementing deadlock avoidance algorithms requires careful logical reasoning and attention to detail.

  • Module 4: Memory Management

    Unit 3: Virtual Memory

    Virtual memory concepts, including paging and segmentation, involve complex address translation mechanisms and require a solid understanding of memory organization.

  • Module 4: Memory Management

    Unit 4: Caching and Thrashing

    Analyzing and mitigating thrashing requires understanding the interplay between memory allocation, page replacement policies, and process behavior, demanding a holistic view of memory management.

A suggested way through it

Suggested

13 weeks, about 78 hours in total. Yours will differ.

  1. Week 1Module 1: Process Management
    • Unit 1: Processes and State · 2 hours

      Understand the definition of a process and its various states (new, running, ready, blocked, terminated).. Learn how the operating system manages processes and allocates resources.. Study the Process Control Block (PCB) and its role in process management..

    • Unit 2: Context Switching · 2 hours

      Explore the concept of context switching and its importance in multitasking.. Understand the steps involved in context switching and its overhead.. Learn about procedures and system calls and their role in process execution..

    • Unit 3: Interrupts and Interrupts Handler · 2 hours

      Understand the concept of interrupts and their types (hardware and software).. Learn about interrupt handlers and their role in servicing interrupt requests.. Study interrupt masking and unmasking techniques..

  2. Week 2Module 2: Concurrency – Multithreading
    • Unit 1: Threads & Multithreading · 2 hours

      Explore the concept of threads and multithreading.. Understand the benefits of multithreading in improving performance and concurrency.. Learn about POSIX threads and the Pthreads API..

    • Unit 2: Types of Threads · 2 hours

      Study different multithreading models (many-to-one, one-to-one, many-to-many).. Learn about thread creation and termination techniques.. Understand the differences between threads and processes..

    • Unit 3: Threads Data Structure and Lifecycle · 2 hours

      Explore the thread control block (TCB) and its contents.. Understand the thread lifecycle and its various states (new, ready, running, blocked, terminated).. Study thread state transitions..

  3. Week 3Module 3: Process Synchronization
    • Unit 1: Race condition, Critical Region and Mutual Exclusion · 2 hours

      Define race condition and its causes.. Understand the concept of critical regions and mutual exclusion.. Learn techniques to resolve race conditions..

    • Unit 2: Deadlocks · 2 hours

      Describe the concept of deadlock and its conditions.. Learn about deadlock detection and avoidance techniques.. Study deadlock prevention strategies..

    • Unit 3: Synchronization · 2 hours

      Explore process synchronization techniques.. Understand the use of semaphores and monitors in solving synchronization problems..

  4. Week 4Module 3: Process Synchronization
    • Unit 4: Synchronization Problems · 6 hours

      Study various synchronization problems, including the producer-consumer problem, the readers-writers problem, and the dining philosophers problem.. Learn how to solve these problems using synchronization primitives..

  5. Week 5Module 4: Memory Management
    • Unit 1: Memory Swapping · 3 hours

      Describe memory swapping techniques.. Understand the concepts of swap in and swap out.. Learn about the advantages and disadvantages of memory swapping..

    • Unit 2: Memory Partition · 3 hours

      Explore contiguous and non-contiguous memory allocation techniques.. Understand memory partitioning and its types (fixed, variable, dynamic).. Study partition allocation methods (first fit, best fit, worst fit, next fit)..

  6. Week 6Module 4: Memory Management
    • Unit 3: Virtual Memory · 6 hours

      Explain the concept of memory segmentation and paging.. Understand the differences between segmentation and paging.. Learn how to solve memory allocation issues in non-contiguous memory spaces..

  7. Week 7Module 4: Memory Management
    • Unit 4: Caching and Thrashing · 6 hours

      Understand the importance of cache memory.. Learn about cache concepts, memory hierarchy, and memory cache lookup techniques.. Study the advantages of cache memory in improving system performance..

  8. Week 8Module 4: Memory Management
    • Unit 5: Replacement Policies · 6 hours

      Find out the cause of thrashing in operating systems.. Demonstrate policies to address thrashing issues.. Study various page replacement algorithms (FIFO, Optimal, LRU)..

  9. Week 9Module 1: Process Management
    • Unit 1: Processes and State · 6 hours

      Review process management concepts, including process states, context switching, and interrupt handling.. Practice solving problems related to process scheduling and resource allocation..

  10. Week 10Module 2: Concurrency – Multithreading
    • Unit 1: Threads & Multithreading · 6 hours

      Review concurrency and multithreading concepts.. Practice writing simple multithreaded programs using Pthreads API.. Solve problems related to thread synchronization and communication..

  11. Week 11Module 3: Process Synchronization
    • Unit 1: Race condition, Critical Region and Mutual Exclusion · 6 hours

      Review process synchronization concepts, including race conditions, deadlocks, and synchronization primitives.. Practice solving synchronization problems using semaphores and monitors.. Analyze and compare different synchronization techniques..

  12. Week 12Module 4: Memory Management
    • Unit 1: Memory Swapping · 6 hours

      Review memory management concepts, including memory swapping, partitioning, and virtual memory.. Practice solving memory allocation problems using different allocation methods.. Analyze the performance of different memory management techniques..

  13. Week 13Module 4: Memory Management
    • Unit 4: Caching and Thrashing · 6 hours

      Review caching concepts and replacement policies.. Practice solving problems related to cache memory and thrashing.. Analyze the impact of cache memory on system performance..

Preparing for the exam

What to do
  • Create concept maps linking process management, concurrency, and memory management.
  • Practice solving synchronization problems using semaphores and monitors.
  • Review memory allocation algorithms and their performance characteristics.
  • Focus on understanding the causes and solutions for deadlocks and thrashing.
  • Study past exam papers and tutor-marked assignments to identify key concepts and problem-solving techniques.

Questions students ask about this course

What is CIT315 about?

This course introduces the principles of operating systems, serving as a liaison between computer users and hardware. It explores process management, concurrency, and synchronization, including race conditions and deadlocks. The course also covers memory management schemes, algorithms, and techniques for resource allocation and memory addressing. Students will gain knowledge of process states, context switching, interrupt handling, multithreading, and memory management strategies, equipping them with a comprehensive understanding of operating system concepts and their practical applications.

How many units does CIT315 have?

CIT315, Operating System, has 14 units across 4 modules, over 184 pages of course material. You can read it one unit at a time.

How many credit units is CIT315?

CIT315 carries 3 credit units, at 300 level in Sciences.

Is CIT315 hard?

CIT315 is rated intermediate level, with basic mathematical content. It is mostly theoretical, problem solving and case study work.

How long does CIT315 take to study?

About 208 hours of study, spread across its 14 units.

How is CIT315 assessed?

CIT315 is assessed by assignments, tutor marked assessments and final examination.

What do I need before starting CIT315?

Basic computer architecture Data structures and algorithms Programming in C/C++

What can I do with CIT315?

System Administrator, Operating System Developer, Software Engineer, Cloud Computing Engineer and Embedded Systems Engineer.

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