Operating Systems Question Bank with Answers 05

What are the different methods of creating processes in operating systems?

Question:

What are the different methods of creating processes in operating systems?

Answer:

Different methods of creating processes in general purpose systems are;

• System initialization - Creation of processes during system initialization

• Create process system call - takes a program name or a stream with the program data

• Copy process system call - a strange way of doing it but is now very widespread. The parent process is copied almost entirely, with changes only to the unique process id, parent process, and user-space. Each new process gets its own user space.

• Create a new terminal session

• Through initialization of batch jobs. Batch job is a collection, or list, of commands that are processed in sequence often without requiring user input or intervention. Batch files are often used to help load programs, run multiple processes at a time, and perform common or repetitive tasks.

***********************

Related Questions:

• List the advantages of user–level threads

• List the disadvantage of user-level threads

• List the advantages of kernel-level threads

• List the disadvantages of kernel-level threads

• What are the typical uses of threads?

• What are user level and kernel level threads?

• What is the purpose of a system call? What mechanism is typically used to implement system calls?

• Compare and contrast on preemptive and non-preemptive scheduling approaches, on issues of simplicity, fairness, performance and required hardware support.

• What are the main steps performed by a file system when a process opens a file?

• List the processor (CPU) execution modes that are necessary for an OS that protects memory and hardware.What is the difference between them?

what are the various ways processes can be created in os