Computer Science AQA A-Level Paper 1 Revision Questions and Answers

What is an integer? A positive or negative whole number What is a Real or Float number? A positive or negative number that can have a fractional part. What is a Boolean? True or False What is a character? A single letter, number or symbol What is a string? A group of characters What is Date/Time? A way of storing Date/Time What is a pointer? A way of storing a memory address. What is a record? A collection of related fields, each of which could hold a different data type. What is an array? A finite, indexed set of related elements of the same data type. What is a user defined data type? A data type derived from existing data types in order to create a customized data structure. What is variable declaration? Creating a variable for the first time. giving it a name and sometimes a data type. What is constant decleration? Creating a constant for the first time. What is assignment? giving a constant or a variable a value. what is iteration? repetition of a process e.g. a while or for loop. this could be definite or indefinite. What is selection? comparing values and then choosing an appropriate action. e.g. an if statement. what is a subroutine? A named block of code containing a set of instructions designed to perform a frequently used operation.