Operating System

1. What is operating  system ? What are the services operating system provides?
2. What do you mean by system call? Explain.
3. What is Graphic uses interface ? Compare GUI and Command interpretor.
4. Classify different types of system call.
5. What is system program? Classify system program.
6. Discuss briefly about layered approach of operating system structure
7. What is module ? What is its advantage.
8. Explain system Boot?
9. What is a process? What are the different states of a process
10. What is PCB?