Oracle Exam 1Z0-819 Topic 2 Question 86 Discussion

Actual exam question for Oracle's 1Z0-819 exam

Question #: 86
Topic #: 2

[All 1Z0-819 Questions]

Which statement about a functional interface is true?

AIt must be defined with the public access modifier.

BIt must be annotated with @FunctionalInterface.

CIt is declared with a single abstract method.

DIt is declared with a single default method.

EIt cannot have any private methods and static methods.

Show Suggested Answer

Suggested Answer: B

by Jacob at Jul 12, 2024, 08:19 PM

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Casey

1 months ago

Ha! I bet the exam writers are trying to trick us with those joke answers. 'Single default method'? Really?

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Wynell

2 months ago

I'm pretty sure it can have private and static methods too. This question is trickier than it seems.

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Virgie

19 days ago

E) It cannot have any private methods and static methods.

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Raina

20 days ago

User 3: Actually, it can have private and static methods too.

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Sage

20 days ago

C) It is declared with a single abstract method.

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Luisa

25 days ago

A) It must be defined with the public access modifier.

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Veronika

1 months ago

User 2: No, it is declared with a single abstract method.

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Kristian

1 months ago

User 1: I think it must be annotated with @FunctionalInterface.

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Kenneth

2 months ago

Wait, I thought it had to be annotated with @FunctionalInterface. Hmm, let me double-check that.

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Donte

2 months ago

Okay, I think option C is the correct answer. A functional interface must have a single abstract method.

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Ludivina

2 months ago

But what about option B? Shouldn't it be annotated with @FunctionalInterface?

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Augustine

2 months ago

I agree with Alaine, a functional interface is declared with a single abstract method.

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Alaine

3 months ago

I think the answer is C.

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