AQA GCSE Computer Science; Data EXAM FINALS [100% PASS]

AQA GCSE Computer Science; Data EXAM FINALS [100% PASS] Data *Ans* Consists of raw facts and figures without context or meaning. Information *Ans* What exists when data has been given context or meaning. Variable *Ans* Space for a single piece of data, each variable has a data type. You can change variables once they have been set. Constant *Ans* Space for a single piece of data, each constant has a data type. You cannot change constants once they have been set. Boolean *Ans* A data type, can be either true or false and requires only one bit of storage. Character *Ans* A data type, a single letter, number, punctuation mark, space etc. - requires one byte. String *Ans* A data type, stores any number of characters, such as a person's name, address and postcode. Integer *Ans* A data type, whole numbers, such as a person's age or how much stock a shop has. Real *Ans* A data type, decimal numbers, such as distances and fractions. Boolean Operator - AND *Ans* If you see AND between two Boolean expressions, the whole expression is true only if both of the smaller expressions are true. For example: age <= 16 AND age >= 5 Boolean Operator - OR *Ans* If either of the expressions either side of the OR is true, then the entire expression is true. Boolean Operator - NOT *Ans* Adding NOT to an expression simply makes it the opposite of what it was before. For example: NOT (age <= 11). This covers all other ages, 12 and up. The meaning of the following operators: >= < = != *Ans* >= Greater than or equal to < Less than = Equal to != Not equal to Array *Ans* An array is a space in memory reserved for more than on