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Defensive Programming Principles

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Questions and Answers

What is a core principle of defensive programming regarding function arguments?

Assume that testing is more important than input validation.

Assume all arguments are always of the correct type and value.

Assume that all function arguments may be of the wrong type or value. (correct)

Assume that all inputs should be manually verified by the user.

Which condition should be checked for the 'word' parameter in a function?

It must be a string with a length of at least 2. (correct)

It must be an array.

It must contain only uppercase letters.

It must be a number.

What type of error handling mechanism should be implemented in a function before processing inputs?

Always return a default value regardless of input.

Only log errors for later review.

Ignore the validity of inputs completely.

Implement checks to ensure inputs meet specific criteria. (correct)

What should happen if the input conditions are not met in a function?

<p>An appropriate error message should be triggered.</p> Signup and view all the answers

Which statement accurately describes the role of if statements in defensive programming?

<p>They allow the function's main logic to execute only if input conditions are satisfied.</p> Signup and view all the answers

Study Notes

Defensive Programming Principles

Assume all function arguments might be incorrect (wrong type or value). Anticipate issues.
Implement checks on inputs before processing them. This minimizes errors.
Within functions, verify data. e.g., check types, lengths, and ranges.
Use if statements to control code flow. Execute primary logic only if checks succeed.
If invalid input is detected, produce an error message. Examples of checks:
- Ensure the word parameter is a string with at least 2 characters.
- Verify the match parameter is a string with exactly 1 character.

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Description

Explore the key concepts of defensive programming in this quiz. You'll learn how to anticipate issues with function arguments, validate inputs, and control code flow effectively. By understanding these principles, you will minimize errors and create robust code.