AQA GCSE Computer Science Programming and Algorithms

An algorithm can be defined as...

• ...defined set of steps that can be used to complete a task

• ...a set of steps that can be used to complete a task

• a random set of steps that can be used to complete a task

• an order of doing things correctly to complete something

Sequence is when...

• ...instructions are executed one after another

• instructions are executed one after another in a series

• instructions are executed by the user

• instructions are executed one after another but not always in series

Selection is when...

• ...a program will execute instructions regardless of what the user does

• ...a program will execute certain instructions based on the user's actions

• ...a program will execute certain instructions based on conditions

• ....a program will execute all instructions regardless of what the user does

Selection statements include...

• IF, THEN, ELSE & CASE

• IF, ELSE, & CASE

• IF, THAN, ELSE & CASE

• IF, THEN, ELSE, ELIF & CASE

In computer programming 'iteration' is used to...

• ... loop around and around a piece of code until the correct answer is chosen

• ...loop around a piece of code until a condition is met that activates the next part of the program

• ...loop around and around a piece of code until a condition is met that ends the iteration

• ...loop twice around a piece of code until a condition is met that ends the iteration

In programming a translator is used to convert different programming languages into machine code. There are three types...

• Assembler, interpreter & compiler

• Assembler, identifier & compiler

• Assembler, identifier & interpreter

• Compiler, identifier & interpreter

An interpreter is a translator that converts high level languages into machine code. It does this by...

• ...working three lines at a time, checking syntax, converting to machine code and executing the code

• ...working one line at a time, converting to machine code, checking syntax and executing the code

• ...working one line at a time, checking syntax, converting to machine code and executing the code

• ...working three lines at a time, converting to machine code, checking syntax and executing the code

An assembler translator...

• ...converts assembly language programs into machine code

• ...converts programs created in any language into machine code

• ...converts programs created in any high level language into machine code

Syntax is a set of rules that defines how program statements must be written in order for the translator to understand them. A syntax error is...

• ...an error in the spelling of program statements

• ...an error in the format of the program statements such as missing keywords

• ...an error in the format of the program statements such as missing semi-colons or keywords spelt incorrectly

• ...an error in the punctuation of program statements

Logic errors in programs are...

• ...errors in program statements that mean the outcome is unexpected, even though the program will run

• ...errors in the algorithm that means the outcome is expected, even though the program will run

• ...errors in the algorithm that means the outcome is unexpected, even though the program will run

• ...errors in the algorithm that means the outcome returns nothing as the program will not run