Exceptions & validation in Java: interview exercises

Exceptions & validation in Java: 6 test-checked interview exercises (A custom checked exception), each beside a worked example, with tests as you go. Free.

1. A custom checked exception
2. Parse with a fallback
3. try-with-resources
4. Collect every validation error
5. Translate an exception
6. Retry an action

Each exercise pairs a worked example with a twin problem to solve in a real editor; the tests run the moment you do. Progress is saved in your browser, and in your account if you sign in.

More Java topics

• Strings
• Collections
• Streams & lambdas
• Records, classes & interfaces
• Generics & Optional
• Algorithms & recursion
• Modern Java

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