Mastering Java: The Ultimate Quiz for 'Thinking in Java'

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Want to excel in Java? Test your knowledge with our ultimate quiz based on 'Thinking in Java'. Engage with multiple-choice questions and in-depth explanations. Boost your understanding and prepare for your exam with confidence.

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Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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For an expression 'a?b:c', what must 'a' be?

  1. An integer

  2. A floating point number

  3. A boolean

  4. Any object

The correct answer is: A boolean

'a' must be a boolean for the ternary operator to work properly. If 'a' is not a boolean, it will be evaluated as a truthy or falsy value and the wrong option (either b or c) will be returned. Option A and B are incorrect because they are data types that are not boolean. Option D is incorrect because any object will also be evaluated as a truthy or falsy value and the wrong option may be returned.

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