Exam 1z0-809 topic 1 question 67 discussion

Actual exam question from Oracle's 1z0-809

Question #: 67
Topic #: 1

Given the code fragment:
BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2; //line n1
System.out.println(val.apply(10, 10.5));
What is the result?

A. 20
B. 20.5
C. A compilation error occurs at line n1.
D. A compilation error occurs at line n2.

Show Suggested Answer

Suggested Answer: C 🗳️

by thetech at Nov. 24, 2019, 10:50 a.m.

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thetech

Highly Voted 5 years, 1 month ago

Compiler error in this line BiFunction<Integer, Double, Integer> val = (t1, t2) -> t1 + t2; Cannot convert from Integer to Double

upvoted 8 times

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asdfjhfgjuaDCV

Most Recent 9 months, 3 weeks ago

C is the correct answer

upvoted 1 times

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steefaand

10 months, 3 weeks ago

Selected Answer: C

C is correct since summing Integer and Double gives Double which can't be implicitly cast to Integer.

upvoted 1 times

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WilsonKKerll

2 years, 9 months ago

Answer is C. Bad return type in lambda expression: double cannot be converted to Integer

upvoted 1 times

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Svetleto13

3 years, 8 months ago

C,tested

upvoted 2 times

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jduarte

3 years, 8 months ago

Answer C cannot convert from double to Integer

upvoted 1 times

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johnchen88

4 years, 11 months ago

The Correct Answer: D since do not see the n2 but see the n1 there

upvoted 2 times

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