1.3.1 Capacity

Question 1

Units of Capacity

Answer 1

The capacity of a device is how much data it can store.

Question 2

Bit

Answer 2

The smallest unit of data that we can store.

The value of a bit can be either a 0 or a 1.

Question 3

Nibble

Answer 3

4 bits

Question 4

Byte

Answer 4

8 bits

Question 5

KB

Answer 5

Kilobyte

1000 bytes

Question 6

MB

Answer 6

Megabyte

1000 KB

Question 7

GB

Answer 7

Gigabyte

1000 MB

Question 8

TB

Answer 8

Terabyte

1000 GB

Question 9

Petabyte

Answer 9

Petabyte

1000 TB

Question 10

Size of data being stored

Answer 10

The bigger the size of the data being stored, the bigger capacity media will be needed.

Question 11

How to convert between the units

Answer 11

To find out if we have enough capacity, it is important to put the capacity of the media and the size of the data into the same units.

Question 12

Available capacity

Answer 12

The more capacity available, the more data we can store.

Question 13

Equation to Calculate Required Capacity of a Device

Answer 13

required capacity = number of files × size of a single file

Question 14

I want to make a backup of 125 photos, which each take up 16 MB of disk space. What is the minimum amount of secondary storage space that I need?

Answer 14

Required capacity = 125 × 16 MB = 2,000 MB

2,000 MB / 1000 = 2 GB