1.2.1 - Systems Software Flashcards

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1
Q

What does an Operating system (OS) do?

A

Software that manages computers and allows humans to use them.

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2
Q

What does backing-store-management do?

A

Allocates and tracks data on secondary storage

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3
Q

What is the role of a Driver?

A

Allows a computer system to interface with new hardware

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4
Q

What does memory management do?

A

Allocates tracks and deletes data on primary memory.

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5
Q

What is a Physical-Location?

A

A register on a hardware device

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6
Q

What is a Logical-Location?

A

A position in an algorithm or process

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7
Q

What is segmentation?

A

Dividing memory logically according to program needs

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8
Q

What is an Interrupt?

A

A signal to the CPU to change the process it is completing.

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9
Q

What is processor scheduling?

A

Assigning different tasks to a CPU at different times to give the appearance of multi tasking.

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10
Q

What is the BIOS?

A

Basic input output system. Initialises system hardware and loads the operating system

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11
Q

What is Virtual Memory?

A

An area of secondary memory used to expand primary memory.

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12
Q

Key notes of virtual memory

A

Used when primary memory is full; Pages form primary memory are moved to secondary memory to create space; When they are needed they are copied back to primary memory possibly requiring other pages to be moved.

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13
Q

What is the Interrupt Process?

A

Interrupt signal received. Stores values of registers for current task. Completes interrupt service routine. Restores previous task

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14
Q

3 types of Interrupts

A

Power failure. Clock (scheduled interrupt). Input/output requests.

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