Oracle Exam 1Z0-819 Topic 10 Question 75 Discussion

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

Question #: 75
Topic #: 10

Given the code fragment:

Which can replace line 2?

AUnaryOperator u = (int i) -> i * 2;

BUnaryOperator u = (var i) -> (i * 2);

CUnaryOperator u = var i -> { return i * 2; };

DUnaryOperator u = i -> { return i * 2);

Show Suggested Answer

Suggested Answer: B

by Fernanda at Mar 10, 2024, 07:35 AM

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6 months ago

I would choose option B because it uses the 'var' keyword for type inference which is more modern.

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7 months ago

I think Vanda is right, option C is more readable and explicit in its return statement.

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7 months ago

But doesn't option C have unnecessary curly braces around the lambda body?

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7 months ago

I disagree, I believe option C is the correct one as it includes the return statement.

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7 months ago

I think option A is correct because it uses the lambda expression correctly.

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