Unit 1 Review

How do computers store and represent data?

• Emojis

• Text messages without vowels or punctuation

• Binary 1's and 0's.

• large prime numbers

What is the difference between digital and analog data?

• One is real, like a TV show. The other is made up, like a cartoon.

• One is an approximation made up of 1's and 0's. The other is made of waveform or physical media.

• One is something you can touch. The other is purely imaginary.

• One is something found on the streets. The other is something that can only be bought in high-end stores.

• 10

• 11

• 12

• 13

What is 5 in binary?

• 0010

• 0011

• 0100

• 0101

• 17

• 18

• 19

• 20

What is 31 in binary?

• 11111

• 11110

• 11101

• 11100

• 37

• 38

• 39

• 40

If you're only using 4 bits, which number(s) would cause an Overflow error? Choose all that apply.

• 14

• 15

• 16

• 17

• 18

What could cause a round-off error?

• Trying to store a number that is too precise for the system

• Making a pie in a square pan instead of a circle

• Trying to fit a round peg into a square hole

• Whittling and sanding before fitting your tongue-in-groove joint

Why would you ever use a Lossy compression algorithm?

• If I'm posting an image that needs to be big and clear, and it doesn't matter how big the file size is.

• If I'm writing a book about the adventures of the Tabaxi warlock named Fluffers and every word needs to be saved perfectly.

• If I'm posting an image that doesn't need to be perfectly clear, but it's important to keep the file size small.

• If I'm sending sensitive emails on a government server that may or may not contain national secrets.