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Java Collections and Streams
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Lambdas and Functional Interfaces

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Q 01/ 05IntermediateQuestion 1 of 5. 0 correct, 0 incorrect.

How many abstract methods does an interface have to declare to be a functional interface?

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For Hugin I fear lest he come not home, But for Munin my care is more.

Grímnismál 20 · tr. Bellows, 1923

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