In direct communication a link may be associated with many processes ?

Message passing may be either blocking or non-blocking

Acts as conduit allowing two processes to communicate

Operation allows OS to protect itself

Process is a passive entity ?

Allows OS to run applications within other OSes

Provides virtualization services

OS a prgram that acts intermediary between a user and software ?

OS service is

Command Line Interpretrr (CLI) allows direct command to entry ?

Programming interface to the services provided by the OS

Type of system calls that has debugger and locks

System services that known as services , subsystems , daemons

All of process and thread creation are light-weight ?

Which of the below is multithreaded ?

Systems putting pressure on programmers

User threads supported by the kernel ?

One-to-one multithreading model more concurrency than many-to-one multithreading model ?

Multithreading model that a few systems currently use it

Provides programmer with API for creating and managing threads

Scheduling criteria that keep the CPU as busy as bossible