OPERATING SYSTEM PROCESSES Flashcards
1
Q
A process is
A
an instance of a program in execution.
2
Q
As a process executes
A
it changes state.
3
Q
Each process is represented in the OS by a process control block
A
The PCB is a repository for any information that may vary from process to process.
4
Q
Thread:
A
a process of operation which allows only one task at a time.
5
Q
Multiple threads
A
of operation allow ability to perform more than one task at a time.
6
Q
The objective of multi-programming is
A
to have some processes running at all times to maximise CPU utilisation.
7
Q
Job queue
A
all processes in the system.
8
Q
Ready queue
A
processes residing in main memory which are ready and waiting to execute.
9
Q
Device queue
A
processes waiting for a particular I/O device.