Practice Question #2

Which of the following is NOT true of how computers represent complex information?

• Computing devices use patterns of bits to represent complex information

• Abstract helps represent complex information by surfacing complexity that might otherwise be hidden

• Depending on context the same sequence of bits may represent different types of information.

• Common abstracts that are represented by computing devices include numbers, characters and color.

Which of the following is true of lossy and lossless compression algorithm?

• Lossy compression algorithms are used when perfect reconstruction of the original data is important.

• Lossy compression algorithm are typically better than lossless compression algorithm at reducing the number of bits needed to represent a piece of data.

• Lossless compression algorithms are only used to compress text data.

• Lossless compression algorithms only allow for an approximate reconstruction of the original data.

Jorge is sending a large image file to a friend as part of a school classroom project. Which of the following is most likely true if Jorge opts to compress the image before sending it?

• The image can no longer be represented using bits

• The image will have been converted into an analog form.

• The image will require fewer bits in order to be represented.

• The image will require fewer bits in order to be represented.

Arman takes a picture with his smart phone which he subsequently posts online. Beatrice finds the picture online and posts a copy of it on her website with an attached Creative commons License. Which of the following best describes who owns the photo.

• Beatrice owns the photo because only holders of a Creative Commons License can own works online.

• Arman owns the photo because he was the original creator and did not license the work.

• Arman owns the photo because it was granted a Creative Commons License by another person online.

• Both own the photo because creating a copy makes it her intellectual property.

A process for creating a digital representation of analog data by measuring the analog data at regular intervals called sampling.

• Sampling

• Lossless Compression

• Lossy Compression

• Creative Commons

A process for reducing the number of bits needed to represent something without losing any information. This process is reversible.

• Sampling

• Lossless Compression

• Lossy Compression

• Creative Commons

A process for reducing the number of bits needed to represent something is which some information is lost or thrown away. The process is not reversible.

• Sampling

• Lossless Compression

• Lossy Compression

• Creative Commons

A collection of public copyright licenses that enable the free distribution of an otherwise copyrighted work, used when an author wants to give people the right to share, use and build upon a work that they have created.

• Sampling

• Lossless Compression

• Lossy Compression

• Creative Commons

Overflow error is an error from attempting to represent a number that is too large.

• TRUE

• FALSE