Real world data rep revision

Robson saved a bitmap with 100 × 100 pixels at 1-bit colour depth. What is the file size in bytes?

• 1000

• 800

• 1250

• 640

Robson found that ASCII cannot represent emoji. What encoding system can?

George says a kilobyte is how many bytes?

• 1024

• 500

• 1000

• 100

Mya says hexadecimal is often used in MAC addresses. What base is hexadecimal?

Brady has an image with dimensions 200 × 100 and 8-bit colour depth. What is the file size in bytes?

• 16000

• 20000

• 80000

• 40000

James S said that audio is originally in what type of signal?

Katie added binary 00000100 + 00000100. What is the result?

• 00001000

• 00010000

• 00001100

• 00000110

Kelsey is explaining compression. What’s one benefit?

Grace is converting the binary number `1010` to decimal. What is the result?

• 8

• 10

• 12

• 6

Florry found that hexadecimal `C` equals what in decimal?