Year 10 Computer Science - End of Year Flashcard

Front

The purpose of data compression is to decrease file sizes.

Back

True

Front

ASCII only contains English characters. The name of the system, which was invented to represent other languages (such as Russian, Arabic or Chinese), and allows up to 1 114 112 possible characters is:

Back

Unicode

Front

Why do computers work with binary bits instead of using decimals?

Back

Computers can not understand any numbers, however they understand on or off (or low voltage and high voltage) which they translate to on and off.

Front

Lossless data compression usually works by..

Back

Finding repeating patterns.

Front

Data compression is important for websites because:

Back

Your webpage will load faster.

Front

Computer users see images, text and graphics that have been converted from binary code

Back

True

Front

Which compression method makes the file smaller by deleting parts of the file permanently (forever)?

Back

Lossy Compression

Front

Makes the file smaller by giving repeated patterns/colours a specific code

Back

Lossless Compression

Front

A set of instructions for the computer to follow

Back

Algorithm

Front

What would you use compression for?

Back

Making an image file smaller