problem 1:

Hard disk is a significant component of a computer. What type of memory is it?

problem 2:

With the assist of a diagram illustrate its features.

problem 3:

Illustrate the working principle of computer.

problem 4:

describe what is meant by ‘Defragmentation’ in relation to hard disk. Why is it significant?

problem 5:

There are two categories of hard disk. What are these categories? How do they distinct from each other?