Streams & lambdas in Java: interview exercises

Streams & lambdas in Java: 6 test-checked interview exercises (Squares of the even numbers), each beside a worked example, with tests as you go. Free.

1. Squares of the even numbers
2. Count the words
3. Flatten nested lists
4. Sort by two keys
5. Partition by a threshold
6. Rows to CSV

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
• Records, classes & interfaces
• Generics & Optional
• Exceptions & validation
• Algorithms & recursion
• Modern Java

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