Linux; Why is OS design complex

Question 1

Linux

Answer 1

uniqueness - 1 address space

Question 2

What do we need with multiple addresses

Answer 2

internal process communication (overhead)

Question 3

Pros of LInux

Answer 3

single address space
module mgmt allows customization

Question 4

Why is OS design complex

Answer 4

resource allocation
process management
memory management
storage management
protection and security
editor
compiling environment
Multiplexer
intermediary between user applications and hardware