IGCSE 0478 CompSci - Number Systems & Multimedia Calculations

What is the decimal equivalent of the binary number 1010?

• 1100

• 10

• 11

• 1001

Convert the hexadecimal number 2F into binary.

• 11001111

• 10101111

• 00101011

• 00101111

Perform the binary addition: 1101 + 1011.

• 10010

• 1111

• 11000

• 1001

Subtract the binary numbers: 1001 - 0110.

• 0011

• 10101

• 1011

• 10011

Multiply the binary numbers: 101 * 11.

• 13

• 15

• 17

• 10

Divide the binary numbers: 1100 / 10.

• 4

• 8

• 6

• 3

Explain the RGB color model and its components.

• The RGB color model consists of three components: Hue, Saturation, and Value.

• The RGB color model consists of three components: Red, Green, and Blue.

• The RGB color model consists of four components: Red, Green, Blue, and Yellow.

• The RGB color model consists of three components: Cyan, Magenta, and Yellow.

What are the different image compression techniques used in multimedia?

• Lossy Compression and Lossy Compression

• Lossy Compression and Uncompressed

• Compressed and Uncompressed

• Lossy Compression and Lossless Compression

What is ASCII and how is it used in computing?

• ASCII is a type of computer virus that corrupts data

• ASCII is used in computing as a character encoding standard to represent text and control characters.

• ASCII is a hardware component in computers

• ASCII is a programming language used for web development

Differentiate between Unicode and Extended ASCII.

• Unicode supports a wider range of characters compared to Extended ASCII.

• Extended ASCII is more commonly used in modern computing.

• Unicode is only used for English characters.

• Unicode and Extended ASCII have the same character range.