AS Level - Topic 1.1 to 1.3

Which of the following is a correct match between a binary prefix and its decimal equivalent?

• Kibi=1,000

• Mebi=1,024

• Gibi=1,073,741,824

• Tebi=1,099,511,627,776

What is the hexadecimal representation of the binary number 10110111?

• B7

• 5F

• D7

• A9

Which of the following is the result of adding binary numbers 1101 and 1011?

• 11000

• 10000

• 10100

• 11110

What is the result of subtracting 1001 from 1100 in binary?

• 0111

• 0011

• 0101

• 0011

Which of the following is a valid BCD representation of the number 97?

• 10010111

• 01100111

• 10010011

• 01101010

Which of the following is an example of a practical application where hexadecimal numbers are used?

• Calculating storage file sizes

• Displaying colors in HTML/CSS

• Representing audio signals

• Storing text in ASCII

Which of the following character encodings uses 8-bit binary codes and can represent up to 256 characters?

• ASCII

• Extended ASCII

• Unicode

• BCD

How is data for a bitmap image typically encoded?

• As a series of vectors defining shapes

• As a grid of pixels, each pixel having a color value

• As a mathematical formula

• As sound waves converted into binary

If a bitmap image has a resolution of 800x600 pixels and a color depth of 24 bits per pixel, what is the filesize in bytes (before compression)?

• 1,440,000 bytes

• 1,152,000 bytes

• 2,304,000 bytes

• 960,000 bytes

Which of the following changes would result in a decrease in the filesize of a bitmap image?

• Increasing the resolution

• Reducing the color depth

• Increasing the sampling rate

• Reducing the image dimensions