1. What is operating system?
It is a system software,which is insatalled on computer system and it do muliti tasking.
Operating system has:
a. kernel: It is the main module of Operating system.
b.HALT Translate:{Hardware Abstraction layer}this command is used to “start and shutdown” the operating system.
2.There are two types of “operating system”.
a.”Client operating system”.
example:windows7,apple{it is single user operating system}.
b.”Server operating system”.
example:Linux,Red hat,windows server 2018.