Q.1 What is Computer Architecture? What is stored program concept

Ans. Computer Architecture:
It is concerned with structure and behaviour of computer as seen by the user. It includes the information formats, the instruction set, and techniques for addressing memory of a computer system is concerned with the specifications of the various functional modules, such as processors and memories and structuring them together into a computer system.

Stored program concept:-

This as introduced in late 1940s by John Von Neumann,Who proposed that a program stored in a binary –number format in a memory device so that instruction could be modified by the computer as determined by intermediate computational result .