AP Computer Science Principles Final Exam Review Questions & Answers
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Course
AP Computer Science Principles
Institution
AP Computer Science Principles
Overflow - ANSWERSerror that results when the number of bits is not enough to hold the number, like a car's odometer "rolling over"
Round-off - ANSWERSerror that results when the number of bits is not enough to represent the actual number, like 3 digits to represent π as 3.14
Lossy - ANSWERS...
AP Computer Science Principles Final
Exam Review Questions & Answers
Overflow - ANSWERSerror that results when the number of bits is not enough to hold
the number, like a car's odometer "rolling over"
Round-off - ANSWERSerror that results when the number of bits is not enough to
represent the actual number, like 3 digits to represent π as 3.14
Lossy - ANSWERSCompressing data in a way that throws some data away and makes
it almost impossible to recover the original, great compression, like JPEG images
Lossless - ANSWERSCompressing data in a way that preserves all data away and
allows full recovery of the original, good compression -- usually not as good as lossy,
like PNG images
Metadata - ANSWERSdata about data, like a camera storing the location, aperture,
shutter speed, etc. for a digital photo
Sequencing - ANSWERScode flows line by line, one after another, like a recipe
Selection - ANSWERSa boolean condition to determine which of two algorithmic paths
are taken, aka if-then
Iteration - ANSWERSusing a looping control structure, like while, for, foreach, repeat,
repeat-until, etc.
Reasonable time - ANSWERSpolynomial in the number of steps an algorithm takes in
the worst case based on the input size
Not reasonable time - ANSWERSUsually exponential in the number of steps, like
doubling every time your input grows by one
Heuristic - ANSWERSusing a "rule" to guide an algorithm, like always walking toward
the north star if you were stuck in a forest
Undecidable - ANSWERSA problem that is so difficult, we can't ever create an algorithm
that would be able to answer yes or no for all inputs, like determining if a user's program
run on some input would always stop and not run forever
Linear vs binary search - ANSWERSGoing one by one vs starting in the middle and
going left/right like looking for a word in the dictionary -- binary search requires the list to
be sorted in order
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