Data types and structures, F452 Computing

Flashcards by Rakib, updated more than 1 year ago
 Created by Rakib about 6 years ago
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Flashcards on Data types and structures, F452 Computing, created by Rakib on 03/24/2015.

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 Question Answer What are integers? How many bits are they represented by? Integers are whole numbers and are usually represented by 32 bits. This is split between positive and negative so ranges from -2,147,483,648 to 2,147,483,647. What are Real numbers? How many bytes are they represented by? Real numbers or floating point (floats) are numbers with decimals. They can either be short - 4 bytes or long - 8 bytes. What is a boolean and what is it used for? Booleans are a data structure that represents either Yes or No (or alternatively True or False). What is a Char? A Char is short for Character and holds the ASCII value for a character like "A" or "&", they are one byte long. What is a string? How many bytes does it take to represent? A string is a one dimensional array that is used to store anything without numeric value like a word or a phone number. One character is represented by one byte so an 11 digit phone number will be represented by 11 bytes.

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