1.1 Data Representation Cambridge iAS 9618

What is the difference between binary prefixes (e.g., Kibi) and decimal prefixes (e.g., Kilo)?

• Binary prefixes are based on powers of 2, while decimal prefixes are based on powers of 10.

• Binary prefixes are used only in networking, while decimal prefixes are used in computing.

• Decimal prefixes are only used for hard drives, while binary prefixes are used for RAM.

• Binary prefixes represent fractions, while decimal prefixes represent whole numbers.

How many bytes are there in 1 Mebibyte (MiB)?

• 1,048,576 bytes

• 1,000,000 bytes

• 1,024,000 bytes

• 1,073,741,824 bytes

What is the decimal equivalent of the hexadecimal number 3F?

• 63

• 31

• 127

• 94

What is the binary representation of the decimal number 27?

• 11011

• 10101

• 11101

• 10011

Which number system is most commonly used by humans for everyday calculations?

• Denary

• Binary

• Hexadecimal

• BCD

Convert the binary number 101101 to hexadecimal.

• 2D

• 1E

• 3C

• 2F

Convert the decimal number 156 to binary.

• 10011100

• 10101100

• 11001100

• 10100100

What is the result of adding the binary numbers 1011 and 0110?

• 10001

• 11001

• 11100

• 10110

In Two’s Complement representation, what is the 8-bit binary representation of -5?

• 11111011

• 11110101

• 10000101

• 00000101

What happens when the result of a binary addition exceeds the bit length allocated?

• Overflow occurs

• Underflow occurs

• The number resets to zero

• The system ignores extra bits