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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller millyphilip. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.99. You're not tied to anything after your purchase.
