Recall & Review
beginner
What is input validation in Express?
Input validation is the process of checking user data before using it in your app to make sure it is safe and correct.
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beginner
Why is input validation important for security?
It stops harmful data like scripts or SQL commands from entering your app, protecting it from attacks like injection or cross-site scripting.
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beginner
How does input validation improve app reliability?
By ensuring data is correct and expected, it prevents crashes and bugs caused by bad or unexpected input.
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beginner
What can happen if you skip input validation in Express?
Your app can be vulnerable to attacks, crash unexpectedly, or behave wrongly because it trusts bad data.
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intermediate
Name a common method to perform input validation in Express.
Using middleware like express-validator to check and sanitize user input before processing it.
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What is the main goal of input validation in Express?
✗ Incorrect
Input validation ensures that user data is safe and correct before using it in the app.
Which of these is a risk of not validating input?
✗ Incorrect
Without validation, bad input can cause crashes or bugs.
Which Express tool helps with input validation?
✗ Incorrect
express-validator is a middleware for checking and sanitizing input.
Input validation helps prevent which type of attack?
✗ Incorrect
Input validation blocks harmful scripts that cause XSS attacks.
What happens if your app trusts all user input without checks?
✗ Incorrect
Trusting unchecked input can cause wrong behavior or crashes.
Explain why input validation is critical in Express applications.
Think about security and app stability.
You got /4 concepts.
Describe the risks of skipping input validation in your Express app.
What bad things can happen with bad input?
You got /4 concepts.