2.6 Y2 Operating System

What are the 3 basic states of a process?

• ready steady go

• running, ready to run, blocked

• running, suspended, blocked

• running, ready, stopped

Tick all the examples of interrupts which might be involved in controlling the processing of programs.

• clock sends interrupt at the end of a time slice

• printer sends interrupt to spooling system.

• terminals send interrupts if key pressed.

• The division of a computers memory for different jobs

• Disk controller sends interrupt when transfer is complete.

What is an amount of time allocated to each job by the operating system called?

When the OS allocates time slices to each job in a multiprogramming operating system it is called:

When the operating system periodically checks if the suspended jobs are ready to re-join the job queue is it called:

• Polling

• Partitioning

• interrupts

• buffering

Tick all that apply.

A buffer:

• Compensates for difference in device speed when transferring data.

• is a small block of memory inside hardware devices such as printers, keyboards and hard drives.

• is the temporary storage of data during input, output or internal transfer of data in a computer.

• can be single or double

• can be used to compress data.

spooling data is stored in what data structure?

• a linked list

• a stack

• a queue

• a binary tree

The priority of an interrupt depends on what?

• The type of data that it is and what directory it is stored in.

• How many times it has been polled

• Importance of the requesting device and the length of time required to service the interrupt.

What are the main features of multi-programming.

• polling

• scheduling

• interrupts

• partitioning

• buffering

The division of computer memory for different jobs is called