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

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Dive into the depths of Java with our quiz based on "Thinking in Java, Fourth Edition" by Bruce Eckel. Test your knowledge, solidify concepts, and prepare for certification with challenging questions and insightful feedback.

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!

Practice this question and more.

What does the unary minus operator do?

Negates a boolean
Inverts the sign of the data
Increments the value
Nothing

The correct answer is: Inverts the sign of the data

The unary minus operator, represented by the "-" symbol, changes the sign of the data it is applied to. It does this by multiplying the value by -1. This operation is commonly used in algebra to simplify equations and in programming to manipulate numerical values. The other options, such as A Negates a boolean and C: Increments the value, do not accurately describe the purpose of the unary minus operator. Option A refers to the logical "not" operation, which is not related to this question. Option C refers to the increment operator, which increases the value by 1, not changing its sign. Option D states that the operator does nothing, which is incorrect as it does have a defined purpose.