Data Representation Flashcards

Front

What is a character set in computing?

Back

A character set is all of the characters that a computer can use, stored as binary numbers.

Front

What are the two standard character sets in common use?

Back

American Standard Code for Information Interchange (ASCII) and Unicode.

Front

How many bits does ASCII use and how many characters does it represent?

Back

ASCII uses seven bits, representing 128 characters.

Front

What is Extended ASCII and how many characters does it represent?

Back

Extended ASCII uses eight bits, representing 256 characters, allowing for special characters like accents.

Front

Why is Unicode more suitable for representing characters in languages like Chinese or Arabic?

Back

Unicode uses 16 bits, giving a range of over 65,000 characters, which is more suitable for languages with many characters.

Front

What is a pixel in digital images?

Back

A pixel is a single point in a digital image, represented by a binary number.

Front

What is color depth in digital images?

Back

Color depth is the number of bits used for each pixel, determining the range of colors in an image.

Front

How does resolution affect image quality?

Back

Resolution describes how tightly packed the pixels are; higher resolution means more pixels and better image quality.

Front

How is sound data processed by computers?

Back

Sound is captured and converted into a digital signal using an analogue-to-digital converter, recorded as samples.

Front

What is bit depth in sound recording?

Back

Bit depth refers to the number of bits used to record each sound sample, affecting accuracy and file size.