AP comp sci unit 2 review

term for a problem solving approach where there is no perfect answer, only multiple satisfactory ones

• guess and check

• heuristic

• compression

• algorithm

what is lossless compression?

• when data is compressed by at least 50%

• when the data can be completely reconstructed

• when information is lost

• when compression is done by hand not by a computer

data used to describe a set of data, for example the dimensions and color system of an image

• compressed data

• metadata

• metric data

• bit data

short for picture element, the units of a single color that together make up an image

• pict

• pixel

• pickle

• pictent

which of the following is FALSE about hexadecimal

• it is a base 16 number system

• it uses numbers 0-9

• it uses letters A-H

• it represents numbers 0-15

which of the following is the correct term for the common color model 3 colors of light

• GRB color model

• RYB color model

• BRY color model

• RGB color model

type of compression used in jpeg and mp3, it is not possible to convert data back to original from the compressed version

• with loss compression

• lossal compression

• loss compression

• lossy compression

which is larger, 10,000 bytes or 1 MB of storage

• 10,000 bytes

• they are the same size

• 1 MB

what is a correct decoding of the following message

" you l*k g*d"

*=oo

• you lok god

• cannot be decoded

• you look good

• you lkoo gdoo

how is it determined if a compression rate is good

• compression rates are bad

• greater than 30 is good

• less than 70 is good

• it is subjective to the text