A Level - Data representation Revision quiz

A hexadecimal value is much easier to read and remember than a string of binary digits

• True

• False

Using hex is quicker to write or type, since a hex digit takes up only one character, not four

• True

• False

Hex is used to define colours, in MAC addresses, in ........ languages and machine code

• event driven

• alternative

• assembly

There is more chance of making an error when typing hex characters than a string of 1s and 0s.

• True

• False

Why is the answer to 24 significant?

• Represents a maximum number of 16 if 1111 are occupied! 4

• Represents a maximum number of 16 if 1111 are occupied! 2

• Represents a maximum number of 16 if 1111 are occupied! 16

Hexadecimal uses letters for the values 10 to 15

• 8 to 15

• 12 to 15

• 10 to 16

• 10 to 15

Which numbering system is known as base 8?

• Octal

• Hex

• binary

Decimal numbers are easy to understand but they are not easy to use in electronics. Also

• they can store less numbers in binary.

• they can store more numbers in binary.

• they can store more unlimited numbers in binary.

Rational numbers (Q) include values that can be expressed as fractions or ratios

• values that can be expressed as whole numbers or ratios

• values that can be expressed as fractions or negative numbers

• values that can be expressed as fractions or ratios

Any whole number that can be written as a fraction.

• rational number

• order number

• un ordered number

• irrational number