Q No 1: What is computer ?
Ans:- An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
- A person who makes calculations, esp. with a calculating machine.
Q No 2: Parts of a Computer ?
If you use a desktop computer, you might already know that there isn't any single part called the "computer." A computer is really a system of many parts working together. The physical parts, which you can see and touch, are collectively called hardware. (Software, on the other hand, refers to the instructions, or programs, that tell the hardware what to do.)
The illustration below shows the most common hardware in a desktop computer system. Your system may look a little different, but it probably has most of these parts. A laptop computer has similar parts but combines them into a single notebook-sized package.