AP Computer Science Principles: Digital Information Exam
heuristic - Answer- problem solving algorithm to find satisfactory solution where finding optimal/exact solution is impossible
when is it most beneficial to use heuristic approach? - Answer- when problem can't be solved in good time & approx. solution is acceptable
lossless compression - Answer- data compression algorithm that enables perfect reconstruction of original data
image - Answer- type of data used for graphics/pics
metadata - Answer- data describing other data
- metadata for a picture would be size of image, colors, etc
pixel - Answer- "picture element"
- fundamental unit of digital image
hexadecimal number system - Answer- number system consisting of 16 symbols:
0-9
A-F
which can occur in each place value
lossy compression - Answer- compression scheme where useless info is thrown out permanently to reduce size of data
lossless compression - Answer- compression scheme where all of original data can be recovered from compressed file
hypothesis - Answer- proposed explanation for some phenomenon to further investigate
Digital Divide - Answer- not everyone has equal access to internet
- household income
- education
- race
- community type
- location
CSV - Answer- comma-separated values
- widely used format for storing data
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