OPERATING SYSTEM PROCESSES Flashcards

1
Q

A process is

A

an instance of a program in execution.

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2
Q

As a process executes

A

it changes state.

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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.

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4
Q

Thread:

A

a process of operation which allows only one task at a time.

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5
Q

Multiple threads

A

of operation allow ability to perform more than one task at a time.

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6
Q

The objective of multi-programming is

A

to have some processes running at all times to maximise CPU utilisation.

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7
Q

Job queue

A

all processes in the system.

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8
Q

Ready queue

A

processes residing in main memory which are ready and waiting to execute.

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9
Q

Device queue

A

processes waiting for a particular I/O device.

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