COMPARSION :a) Multiprogrammingb) Multitaskingc) Multithreading

Evolution

MULTIPROGRAMMING: Efficient use of CPU

MULTITASKING: Logical extension

MULTITHREADING: Drawbacks of Process-creation

SERVICE QUALITY MULTIPROGRAMMING: Less user-interactive

centralized control for systemMULTITASKING:

highly user interactive(via i/o devices)MULTITHREADING: Less time consuming

low overhead+ no resource duplication

FEATURES:MULTIPROGRAMMING:

Effective utilization of resourcesMULTITASKING:

Require a interactive computerResponse time <<<< 1

MULTITHREADING: USED IN (RPC) ELIMINATES INFINTE WAITING

EXAMPLES :MULTIPROGRAMMING: WAIT FOR

I/O INTERACTIONMULTITASKING: SPEED

DIFFERNIAL BETWEEN USER AND SYSTEM.

MULTITHREADING: WEB SERVER HANDLING

SOLORIS-INTERRUPT HANDLING LINUX:MEMORY FREE FUNCTION