1. Parent and Child Process Messages

   Creates a child process using fork().

   Both parent and child print their own messages.

   Demonstrates how processes run independently after fork().

2. Parent Waits for Child

   Parent creates a child process.

   Parent waits for the child to complete using wait().

   Ensures child finishes before parent continues.

3. Alternate Number Printing with Pipes

   Uses two processes connected by a pipe.

   Parent and child print numbers alternately (e.g., parent prints even, child prints odd).

   Demonstrates inter-process communication with pipes.

4. Producer-Consumer Problem

   One process produces data, another consumes it.

   Uses pipes or shared memory for communication.

   Illustrates synchronization between processes.

5. CPU Scheduling Algorithms

   Simulates common CPU scheduling algorithms:

    -FCFS (First Come First Serve): Jobs are executed in order of arrival.
   
    -SJF (Shortest Job First): Jobs with shortest execution time run first.
   
    -Round Robin: Each job gets a fixed time slice in rotation.
   

   Helps understand how CPU manages multiple processes.