Free Printable Binary code intro

1.

What is binary also known as?

a)

Base 1

b)

Base 2

c)

Base 3

d)

Base 10

2.

What are the number choices in binary?

a)

0 and 1

b)

0, 1 and 2

c)

0 to 2

d)

0 to 9

3.

What are the first 6 powers in binary?

a)

0, 2, 4, 8, 12, 32

b)

1, 2, 4, 8, 16, 31

c)

1, 2, 6, 8, 16, 32

d)

1, 2, 4, 8, 16, 32

4.

What is a binary number?

a)

Two people walking in pairs

b)

A pair of numbers in a table

c)

A number system that only uses two digits: 1 and 0.

d)

Two canaries

5.

What is denary?

a)

A number system that humans use (0-9). Base 10.

b)

A mental coding system

c)

A coding system used by deaf people

d)

A starting data packet

6.

How many digits can the denary system use?

a)

2

b)

4

c)

10

d)

100

7.

The process of taking plain text, like an email, and scrambling it into an unreadable format is called…

a)

Decryption

b)

Encryption

c)

Incarnation

d)

Validation

8.

Computers are powered by electricity, and therefore can only be on or off. 1 represents ______ , and 0 represents _______.

a)

Off, on

b)

T, I, F

c)

On, Indeterminate

d)

On, off

9.

A message in natural language is called plain text. An encrypted message would be a…

a)

a. Cyber-text

b)

b. Cyphertext

c)

c. cybernet

d)

d. Cyber-byte

10.

We need a _________ to be able to decrypt an encrypted message.

a)

a. A computer

b)

b. An encryption machine

c)

c. A key

d)

d. A tally chart

11.

Which is a system for encoding letters and symbols into binary?

a)

a. International Binary Coding System,

b)

b. KERAS

c)

c. TensorFlow

d)

d. ASCII

12.

Which of these describes a binary bit?

a)

a. 01010101

b)

b. 12563

c)

c. 1 or 0

d)

d. 2 or 3

13.

How many bits make up a byte?

a)

16

b)

8

c)

7

d)

4

e)

2

14.

What is a pixel?

a)

a. A tiny square of colour

b)

b. A tiny circle of colour

c)

c. A tiny piece of music

d)

d. A tiny triangle of colour.

15.

If a binary number ends with a 1, it must be...

a)

a. An odd number

b)

b. An even number

c)

c. A prime number

d)

d. The number 12

16.

What is 0101 in denary (base 10)?

(a)

17.

What is 1111 in denary (base 10)?

(a)

18.

Which of these is the correct sequence for the place values for binary numbers?

a)

1, 2, 4, 8, 16, 32, 64, 128

b)

1, 2, 4, 6, 8, 10, 12, 14, 16

c)

1, 2, 3, 4, 5, 6, 7, 8

d)

0, 1

19.

What kind of data does a computer represent with binary?

a)

numbers

b)

letters

c)

pictures

d)

all of the above

20.

Convert 128 to binary

a)

10000000

b)

01111110

c)

10000001

d)

11001100

21.

Convert 11111111 to decimal

a)

255

b)

245

c)

235

d)

225

22.

What is the point of binary?

a)

It represents how computers interpret electrical signals

b)

Because we like to make you do extra maths ;-D

c)

For the lulz

d)

Because it describes star systems

23.

How would you write the number 4 in binary code?

a)

0100

b)

0000

c)

0001

d)

0010

24.

Convert 65 to binary

a)

01100001

b)

00100001

c)

01000001

d)

00100101

25.

Convert 254 to binary

a)

11110000

b)

11111100

c)

11111111

d)

11111110

26.

Convert 00010001 to decimal

a)

17

b)

27

c)

37

d)

47

27.

What is 13 in binary?

a)

1111

b)

0001

c)

0010

d)

1101

Binary code intro

Total questions: 27

Worksheet time: 15mins

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