The one-to-one model maps many user-level threads to one kernel thread.

The degree of multiprogramming refers to the number of processes in memory.

An orphan process is a process that has been terminated but whose parent has not yet called wait().

Entitlements are commonly used in Linux system protection.

The heap section is the section of process memory that is dynamically allocated during process run time.

Microsoft Windows uses the one-to-one thread mapping model.

Linux distinguishes between processes and threads.

The data section of a process contains temporary data such as function parameters, return addresses, and local variables.

Protection is not one of the major categories of system calls.

It is possible to have concurrency without parallelism.