Data as binary

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Quick Questions

Shade in the A or B circle for each question.

1. Which digits does binary use to represent data?

A Only 0 and 1

B Digits 0 to 9

2. How many bits make 1 byte?

A 2 bits

B 8 bits

3. How does a digital system's hardware treat the binary digits 1 and 0?

A As on and off electrical signals

B As the letters A and B

4. Which kinds of data can a digital system store as binary?

A Text, images, sound and video

B Only numbers

5. Why can one format (binary) be used for every data type?

A Each data type needs its own special digits

B Any data can be turned into patterns of 0s and 1s

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
101001000		ADigital systems use binary for ALL data, including text, images, sound and video. One format works for every data type.
21 = on, 0 = off		B1 byte = 8 bits
3A bit is a single binary digit, which can only be a 0 or a 1		COne byte: 8 bits, each a 0 or 1, which a digital system can use to store a single piece of data
48 bits grouped together make 1 byte		D1
5Binary uses the digits 0 to 9		EBinary digits stand for the two electrical signals a digital system can use
6Computers use binary only for numbers, not for pictures or sound		FBinary only uses two digits, 0 and 1. The digits 0 to 9 are used in the decimal system, not binary.

Definitions

binary

Fill in the Blanks

Complete each line of code by filling in the missing parts.

1 byte = _ bits

on signal = 1, off signal = _

Digital systems store all data as ______

print(___(5)) # shows 0b101

one ___ is a single 0 or 1

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A bit_on = 1

B bit_off = 0

C bits_in_byte = 8

D bits_in_byte = 4

Question 2

A bytes = 2

B bits_per_byte = 10

C total = bytes * bits_per_byte

D print(total)

Question 3

A storage = 'decimal'

B photo = '10110010'

C song = '01101101'

D print(storage)

Question 4

A types = ['text', 'image']

B types.append('sound')

C all_binary = False

D print(types, all_binary)

Question 5

A bits = '1011'

B for b in bits:

C if b in '012':

D print('valid bit')

Answer Key

Data as binary

Section A: Quick Questions

A — Only 0 and 1

B — 8 bits

A — As on and off electrical signals

A — Text, images, sound and video

B — Any data can be turned into patterns of 0s and 1s

Section B: Match the Pairs

01001000 → One byte: 8 bits, each a 0 or 1, which a digital system can use to store a single piece of data

1 = on, 0 = off → Binary digits stand for the two electrical signals a digital system can use

A bit is a single binary digit, which can only be a 0 or a 1 → 1

8 bits grouped together make 1 byte → 1 byte = 8 bits

Binary uses the digits 0 to 9 → Binary only uses two digits, 0 and 1. The digits 0 to 9 are used in the decimal system, not binary.

Computers use binary only for numbers, not for pictures or sound → Digital systems use binary for ALL data, including text, images, sound and video. One format works for every data type.

Section C: Definitions

binary — A number system using only 0s and 1s (bits). Digital systems use binary, as on/off signals, to represent all data: text, images, sound and video. 8 bits make 1 byte.

Section D: Fill in the Blanks

1 byte = 8 bits

on signal = 1, off signal = 0

Digital systems store all data as binary

print(bin(5)) # shows 0b101

one bit is a single 0 or 1

Section E: Spot the Error

D — A byte is made of 8 bits, not 4. The line should be bits_in_byte = 8.

B — 1 byte is always 8 bits, not 10. The line should be bits_per_byte = 8.

A — Digital systems store all data, including images and sound, as binary (0s and 1s), not decimal. It should be storage = 'binary'.

C — Every type of data (text, images, sound) is represented in binary, so all_binary should be True.

C — Binary only uses the digits 0 and 1, so 2 is not a valid bit. The check should be if b in '01':.