wants to know abt memory allocation(data segment,code segment,heap,stack n all)

Answer 1

you might know that all these are related to data structures.so you can subscribe for any online tutorials. But learn it in C language bcoz it's the base.

Answer 2

already doing course but didn't understood properly

Answer 3

I hope you know about LinkedIn.and there is another service linked to it.
Lynda

subscribe it, there is one month free trial version available and after ,it can be subscribed by paying.

so in Lynda there is a great way to learn and understand such concepts.
I think the turor's name is Simon Allardice..
give it a try.