GCSE Computer Science
2026 | Study Guide,
Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
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Rationales
Included
,Algorithm A sequence of steps to be performed to solve a problem
Computer Program An implementation of an algorithm
Data Structure Specialized format for storing and organizing data
Procedure A names section of code which performs a task and does not return a value
Function A named section of code which performs a task and returns a value
Parameter A special type of variable which can be passed through sub-routines
Scope The reach of a variable/data structure
Computer System A combination of software and hardware
Character Single Value "a" or "9"
Integer Whole Number
Boolean True or False Value
ASCII Character Set: Limited to 7 bits, only applicable in Latin based languages
, Real Integer or
Decimal Number
Binary Composed of 1's and 0's
Hexadecimal Composed of Integers 0-9 and Strings A-F
Denary Composed of Digits 0-9
Run-Time Error Error that occurs while the program is running
Unicode Alternative character set
Iteration The process of repeating steps
Selection A question is asked and from the response several paths can be taken
Sequence The order in which instructions are performed
Logic Error An error in the logic of the code which causes it to run incorrectly but not crash
Syntax Error An error in the syntax of the code
Will cause the program to crash
Sample Rate The frequency at which samples are taken
2026 | Study Guide,
Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
,Algorithm A sequence of steps to be performed to solve a problem
Computer Program An implementation of an algorithm
Data Structure Specialized format for storing and organizing data
Procedure A names section of code which performs a task and does not return a value
Function A named section of code which performs a task and returns a value
Parameter A special type of variable which can be passed through sub-routines
Scope The reach of a variable/data structure
Computer System A combination of software and hardware
Character Single Value "a" or "9"
Integer Whole Number
Boolean True or False Value
ASCII Character Set: Limited to 7 bits, only applicable in Latin based languages
, Real Integer or
Decimal Number
Binary Composed of 1's and 0's
Hexadecimal Composed of Integers 0-9 and Strings A-F
Denary Composed of Digits 0-9
Run-Time Error Error that occurs while the program is running
Unicode Alternative character set
Iteration The process of repeating steps
Selection A question is asked and from the response several paths can be taken
Sequence The order in which instructions are performed
Logic Error An error in the logic of the code which causes it to run incorrectly but not crash
Syntax Error An error in the syntax of the code
Will cause the program to crash
Sample Rate The frequency at which samples are taken
