KS3 Data Representation Revision

The number of digits in the decimal number system.

• 2

• 16

• 255

• 10

The decimal number system is used by....

• Humans only

• Humans & Computers

• Computers Only

• Humans, computers and digital devices

The binary number system has 2 digits to represent data, which are...

• 1 to 10

• 1 and A

• 0 and 1

• 1 and 2

Select the correct statements about the binary number system.

• The binary number system is based on the powers of 10.

• A 'bit' of data can represent either 0 or 1

• Binary data is used primary by computers, but humans find it difficult to understand.

• Each hexadecimal digit is equivalent to 2 bits of binary data.

• The binary number system is based on powers of 2.

Convert 10001 to decimal

• 17

• 27

• 37

• 47

Convert 11111111 to decimal

• 255
• 245
• 235
• 225

Convert 00100100 to decimal

• 26
• 36
• 46
• 56

How do we know if a number is odd?

• It has a leading 0
• It doesn't have a leading 0
• It has a '0' in its 1s column
• It has a '1' in its 1s column

What is ASCII?

• alphabetical source code for Information integration
• Alpha source code for information exchange
• American Standard Code for Information Interchange
• A short code for converting letters

How different characters can be representation in a standard 7 bit ASCII character map?

• 10

• 128

• 256

• 16