3 system software

Question 1

Interrupts

Answer 1

Electronic signals (hardware interrupt) or a process-generated signals (software interrupt) that is sent to the CPU to inform it that a device or process requires attention.

Question 2

Name some common interrupts.

Answer 2

Storage devices, timers, peripherals, power, and software and hardware failure.

Question 3

Buffers

Answer 3

Used on devices to allow the CPU to perform other tasks while data is being saved.

Question 4

Interrupt service routines (ISR)

Answer 4

Bits of code that are run when an interrupt occurs; these are normally within the device driver.

Question 5

Process state: running

Answer 5

Currently has CPU time.

Question 6

Process state: blocked

Answer 6

Waiting for an operation to complete.

Question 7

Process state: ready to run

Answer 7

Waiting for the CPU.

Question 8

What are pages

Answer 8

Blocks of fixed size memory that are referenced through a paging table.

Question 9

What does a paging table include?

Answer 9

page no and offset to physical memory

Question 10

what allows blocks of memory to be used?

Answer 10

segmentation

Question 11

Are blocks of memory variable or fixed in size?

Answer 11

variable

Question 12

What is application software?

Answer 12

Software that allows a user to carry out a specific task.

Question 13

Why is memory managing important?

Answer 13

to stop the RAM getting overloaded.