2.1 Units And Binary Numbers

Question 1

What is binary

Answer 1

A base 2 number system. It has 2 states power on = 1, power off = 0

Question 2

How is data stored on a computer?

Answer 2

Data such as images, text files etc., are stored in binary

Question 3

1 bit

Answer 3

Single 0 or 1

Question 4

1 byte

Answer 4

8 bits (1 char of text)

Question 5

1 nibble

Answer 5

4 bits or half a byte

Question 6

1 kB

Answer 6

1000 bytes

Question 7

1 MB

Answer 7

1000 kB

Question 8

1 GB

Answer 8

1000 MB

Question 9

1 TB

Answer 9

1000 GB

Question 10

1 PB

Answer 10

1000 TB

Question 11

Give the order of size of bytes

Answer 11

• Kilo
• Mega
• Giga
• Tera
• Peta

Question 12

How much space does 2 char of text take?

Answer 12

1 byte

Question 13

How much space does a full page of text take?

Answer 13

30 kB

Question 14

How much space does a small digital colour take?

Answer 14

3 MB

Question 15

How much space does a Music CD have?

Answer 15

650 mB

Question 16

DVD Capacity

Answer 16

4.5GB

Question 17

Hard disk capacity

Answer 17

1 TB

Question 18

How do you work out the combination of number of bits

Answer 18

2^n

Question 19

What base is denary?

Answer 19

10

Question 20

What base is binary?

Answer 20

Base 2

Question 21

In a byte of data which bit is the most significant?

Answer 21

The MSB is the bit furthest to the left. In a byte the MSB has a value of 128

Question 22

In a byte of data which bit is the least significant

Answer 22

The LSB is the bit furthest to the right.

Question 23

Convert 28 into binary in 1 byte

Answer 23

00011100

Question 24

What is the largest value that can be stored in a byte?

Answer 24

255

Question 25

How do you calculate the largest value with a certain amount of bits being n?

Answer 25

2^n-1