관심있는것들

exporting user defined variable to sub shell preprocessor == include headerfile, expand macro , remove comments , generate modfied source program. gcc -E only preprocess compiler == generate assembly program. 1. check for syntax error 2. converts source to assembly of underlying processor(x86) Assembler == generate relocatable object program. assemble to machine depend code. Linker == combine al..

Hypervisor hypervisor is virtual machine manager, can install multiple hypervisor , can create mutiple virtual machine in each virtual machine we can have different guest OS. virtual machine can have 2 ways of S/W implementation 1. System VM == execute program like physical machine , provide complete system platform 2. Process VM == disappear when process die (JVM) internal command == whose code..