Encoding and Compressing Complex Information

Question 1

1 character

Answer 1

1 byte

Question 2

8 bytes

Answer 2

1 bit

Question 3

1000 bytes

Answer 3

1 KB

Question 4

1000 KB

Answer 4

1 MB

Question 5

1000 MB

Answer 5

1 GB

Question 6

1000 GB

Answer 6

1 TB

Question 7

Bitmap

Answer 7

Uncompressed
Fast, easy to interpret, but large file size
MS Paint

Question 8

PNG

Answer 8

Lossless
Good compression rate, but bad complex images
Logos, fine art, maps and blueprints

Question 9

GIF

Answer 9

Lossy
Good for animation but low quality and bad compression
Animated icons

Question 10

JPEG

Answer 10

Lossy
Good compression rate but leaves noticeable artifacts
Photographs

Question 11

MP3

Answer 11

the higher the bitrate the better to quality with a large file

Question 12

Music

Answer 12

throws away all stuff that you can’t hear

Question 13

sample

Answer 13

records bits of sound wave

Question 14

MP4

Answer 14

takes away detail in videos, averaging/blending colors

Question 15

Metadata

Answer 15

provides info. about 1 or more aspects of data. Ex: Location, words, people

Question 16

decimal

Answer 16

0-9

Question 17

hexadecimal

Answer 17

0-f

Question 18

binary

Answer 18

0-1

Question 19

the size of a bitmap image given dimensions and color depth

Answer 19

length x width x bits per pixel

Question 20

lossless

Answer 20

reduces file size without deleting information

Question 21

lossy

Answer 21

delete un-important information

Question 22

why is file compression necessary?

Answer 22

save storage space

Question 23

key feature of data that makes it compressible

Answer 23

repetition

Question 24

What is a “heuristic” in computer science?

Answer 24

Trying to find the right algorithm by trial/error to reduce file size

Question 25

Why can’t we calculate the exact number of JPEG images that will fit on storage media?

Answer 25

You get a variety of file sizes when taking photos