In: Computer Science
1. In the Operating System zoo describe the 4 different types of Operating Systems and describe them.
2. Describe what happens when booting a computer ?
3. What are System calls. Provide 6 file and directory system calls
1. The four different types of operating systems are
a) Server operating system - These operating systems runs on servers which are very large personal computers or workstations or can be mainframes which serves n numbers of users at a time over a network and allow users to share resources like software and hardware or any data .
b) Multiprocessor operating system - In this type of operating system multiples CPUs are connected into a single system and they are also called parallel computers or microprocessor .
C) Personal Computer operating system - These system serves the needs of a single user and mainly used for word processing ,power point presentation,docs ,games and internet acess .
d) Embedded operating system - These operating system generally those system which doesn't accept user installed software like TV sets , microwave ovens ,radio ,MP3 player etc.
2. After booting a computer ,the processor looks for instructions in ROM and executes them ,the boot device eithers loads the operating system or get it from somewhere else .
3. System calls means that it is a WAY for programs to communicate with operating systems . System call provides services of operating system to the user program through application program interface .