APCSP Unit 1

Convert the decimal (base-10) number 20 to binary (base-2)

10100

Your computer uses 4 bits to represent decimal numbers (0, 1, 2, 3 and so on) in binary. What is the SMALLEST number for which an overflow error occur?

16

How many total numbers can be represented with an 8-bit binary (base-2) system?

256

1001 to decimal (base-10)

9

how computing devices represent information?

A computer represents data as bits which is either a 0 or a 1

Which of the following is true of intellectual property?

Creative Commons enables content creators to freely distribute their otherwise copyrighted work.

binary numbers

Number system with a base of 2, unlike the number systems most of us use that have bases of 10 (decimal numbers), 12 (measurement in feet and inches), and 60 (time). Binary numbers are preferred for computers for precision and economy. An electronic circuit that can detect the difference between two states (on-off, 0-1) is easier and more inexpensive to build than one that could detect the differences among ten states (0-9).

lossy and lossless compression algorithms

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

what happens when you opt to compress the image before sending it?

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

what is the differences between the painting itself and the photo of the painting stored on the smartphone?

The photo is a digital representation of the analog painting

what is MOST LIKELY to lead to legal consequences when getting information for a school project online?

Using images posted online by another student without permission or citation.

how do computers represent numbers?

With a fixed number of bits some numbers are too large to represent in a computer which will lead to overflow errors.

What does lossless compression do?

ensures perfect reconstruction of the photo.

What data size does lossy compression have?

smaller