L-1: Introduction

L-1.1: Introduction to Operating System and its Functions with English Subtitles

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L-1.2: Batch Operating System | Types of Operating System

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L-1.3: Multiprogramming and Multitasking Operating System in Hindi with real life examples

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L-1.4: Types of OS(Real Time OS, Distributed, Clustered & Embedded OS)

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L-1.5: Process States in Operating System| Schedulers(Long term, Short term, Medium term)

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L-1.6: Imp Linux Commands(Operating System) | Must Watch for College/University & Competitive exams

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L-1.7: System Calls in Operating system and its types in Hindi

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L-1.8: Fork System call with Example | Fork() system call questions ⭐⭐

Fork() - Create a Child Process that will be clone of the Parent Process

• It is required if parent process is busy somewhere

               /  0 (Child)
Fork() return  -  +1 (+ve) (Parent)
               \ -1 (-ve) (if Child process is not created)

main(){
  fork();
  printf("hello");
}

parent process -> main()

   P
   |
   fork()
  /  \
  C1    P
   |    |
 hello  hello

main(){
  fork();
  fork();
  printf("hi");
}

     P
     |
     fork()   1
    /  \
    C1    P
     |    |
  fork() fork()   2
   /   \     /   \
  C2    C1  C3   P
  |      |   |   |
  hi     hi  hi  hi


c1 c2 c3 will run concurrent...

Note:

• If we don’t want to use Fork() we could use Thread
• Thread -> If a parent is busy, we can make a thread, that create a third hand of the process.
• It is shared

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L-1.9: Questions on Fork System Call With Explanation | Operating System ⭐

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L-1.10: User mode and Kernel mode in operating system in hindi ⭐

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L-1.11: Process Vs Threads in Operating System ⭐

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L-1.12: User Level Vs Kernel Level Thread in Operating System | All Imp Points ⭐

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