a. Write the memory/storage that matches with the following characteristics or properties. 1. Magnetic surface, Non-volatile and direct access. 2. Surface use materials that has two phase state, can...

a. Write the memory/storage that matches with the following characteristics or properties.

1. Magnetic surface, Non-volatile and direct access.

2. Surface use materials that has two phase state, can be rewritten and use laser beam.

3. Semiconductor, volatile and random access.

4. Fastest access time, inboard and the smallest in capacity

b. List and briefly explain two techniques of I/0 operations.