Processes-Lec.6

Question 1

Process definition SER

Answer 1

A program in execution, unit of scheduling, execution and resources.

Question 2

Processes in memory TPSDH

Answer 2

Text Section(program code, instructions), Program Counter, Stack(temp. data such as function parameters, return addresses, local variables), Data Selection(global variables), Heap(dynamically allocated memory during process runtime)

Question 3

Process States NRWRT

Answer 3

New- process is being created, Ready- process is waiting to be assigned a processor to run, Waiting- process is waiting for some event to occur, Running- Instructions are being executed, Terminated- process has finished execution

Question 4

Process scheduling- involves managing process queues(JQ RQ DQ)

Answer 4

Job Queue- set of all processes in system, Ready Queue- set of all processes in main memory ready and waiting to execute, Device Queue- set of processes waiting for an I/O device.

Question 5

Schedulers-Long term and short term

Answer 5

Long-term scheduler(job scheduler)- manages which processes enter the ready queue, short-term scheduler(CPU scheduler)- decides which process gets CPU time

Question 6

context switches

Answer 6

When CPU switches between processes, it saves the old processes state and loads the new one