1.1.3 - input, output and storage

Question 1

2 examples of magnetic devices

Answer 1

• magnetic hard drive
• magnetic tape

Question 2

How is data stored in magnetic devices?

Answer 2

• Data stored by altering the magnetic field of a small section of the tape or disk.
• One orientation represents a binary value of 1 and the other represents a 0.
• Written to using a write head.
• Read head can then read the magnetic field and retrieve the data.
• These heads move across the disk.

Question 3

How is data stored in solid state devices?

Answer 3

• Store data using semiconductors.
• Drives can be based on NAND Flash or DRAM.
• No moving parts required.
• Limited life span.