AQA GCSE Computer Science 2023 exam questions with 100% correct answers

Data A general term for facts and figures. Before items of data are input into a computer system, they have not been processed or organised. Information Data that has been processed or organised by the computer. It is the output from a computer system. Data processing The process of transforming data into information. Happens inside the computer. Constant The same as variables except their initial assigned value cannot be changed during the program's execution Variable Structures that hold data and are uniquely named by the programmer. Data assigned to it is held until it is changed or the program completes. String Used to store any group of text characters Integer A whole number Array An ordered arrangement of data elements that are accessed by referencing their location within the array; a process called indexing Boolean A logical value. Two values: true and false Real (or Float) A decimal number Data structure The collection of different data elements (e.g- an array of strings) which are stored together in a clear, structured form Loop A step in an algorithm that may be repeated one or more times Iteration One repitition of a loop Procedure Named blocks of code that can be used and reused to perform specific tasks without returning a value. It is the same thing as a sub-procedure. Parameters Variable given as information to a function/procedure Function Named blocks of code that can be used and reused to perform specific tasks by returning a value. Can be used as a procedure. Return value The value produced by a function (such as a subroutine) Scope Refers to where a variable/constant/function or procedure is accessible in your code. Also called 'visibility' Syntax error An error that occurs when the programmer fails to obey the rules of the computer language. Dictionaries A structure that stores values alongside different keys Program flow control The order in which a program is executed Run-time error These occur when the program requires the computer to complete an operation it cannot handle Logic error When the program's execution occurs as normal, but not as the programmer intended Trace table A way to note down the value of each variable at each step of a program. Breakpoint A point in a program where the execution will pause so the programmer can observe results. Step through To execute a program one line at a time, observing the results at each step. Hardware The pieces of equipment that make up a computer system Software The instructions that make a computer function in the required way Debug To check through a program for errors and correct them Robust Software that will function under a range of different circumstances without failing Reliable Software that produces predictable results Central Processing Unit The hardware within the computer that carries out the instructions of the computer program (like a brain). It's purpose is to process data using the processor in it