Develop code

Question 1

Give three types of errors that could occur within a program.

Answer 1

• Syntax
• Logic
• Runtime

Question 2

What is a syntax error?

Answer 2

An error that occurs when the rules of the programming language are not followed (e.g. command word is mispelled, punctuation is incorrect, variable is used without being initialised)

Question 3

What is a logic error?

Answer 3

An error that occurs when there is a flaw in the design of a program, which does not prevent it from running but produces an incorrect or unexpected result

Question 4

What is a runtime error?

Answer 4

An error that occurs during program execution when the processor is asked to perform an impossible operation (e.g. divide by zero, open a non-existent file)

Question 5

State the purpose of a trace table.

Answer 5

• To allow the value of a variable, outputs and decisions in certain points throughout the algorithm to be recorded
• To help detect logic errors in the program