Operating System Concepts

Front

Bootstrap

Back

A small program that is used to load other programs to ‘start up’ a computer.

Front

Scheduling

Back

Process manager which handles the removal of running programs from the CPU and the selection of new processes.

Front

Direct memory access (DMA) controller

Back

Device that allows certain hardware to access RAM independently of the CPU.

Front

Kernel

Back

The core of an OS with control over process management, memory management, interrupt handling, device management and I/O operations.

Front

Multitasking

Back

Function allowing a computer to process more than one task/process at a time.

Front

Process

Back

A program that has started to be executed.

Front

Preemptive

Back

Type of scheduling in which a process switches from running state to steady state or from waiting state to steady state.

Front

Quantum

Back

A fixed time slice allocated to a process.

Front

Non-preemptive

Back

Type of scheduling in which a process terminates or switches from a running state to a waiting state.

Front

Burst time

Back

The time when a process has control of the CPU.