## Digital Data Representation WebQuest

posted by: Mr. Bergquist 19 September 2011 No Comment

We’ve learned that all computerized information is stored as binary – a numerical system in which only two states are possible. We generally think of this representation as a sequence of ‘0’s and ‘1’s.

In this webquest, you’ll use websites I outline as well as your favorite search engine to answer a series of questions related to digital data storage and representation. You should come away with a better understanding of how information is represented by computers.

## Data storage

1. To represent the number 5634, how many bits do I need? (try search for ‘5634 in binary’ using Google)

2. The largest harddrives currently on the market have a capacity of approximately 10 terabytes (and costs around 1,500 to 2,500 dollars.) How many bits are in one terabyte?

3. Roughly how many MP3s can be stored in a terabyte of space? How many hours of music is this?

4. How are bits encoded on a CD?  Hint: search for how CDs work.

## Digital images

1. As we discussed, colors in digital pictures are represented numerically. Designers and web developers often describe colors in hexadecimal. What is hexadecimal and how is it related to binary?