Java 8 Online Quiz
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Following quiz provides Multiple Choice Questions (MCQs) related to Java 8 . You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using Show Answer button. You can use Next Quiz button to check new set of questions in the quiz.
Answer : A
Explanation
System.out::println method is a static method reference to println method of out object of System class.
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Answer : A
Explanation
DoubleFunction<R> functional interface represents a function that accepts a double-valued argument and produces a result.
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Answer : C
Explanation
Function<T,R> functional interface represents a function that accepts one argument and produces a result.
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Answer : A
Explanation
LongToDoubleFunction functional interface represents a function that accepts a long-valued argument and produces a double-valued result.
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Answer : A
Explanation
ToLongBiFunction<T,U> functional interface represents a function that accepts two arguments and produces a long-valued result.
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Answer : B
Explanation
Using name of the interface.
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Answer : A
Explanation
Local − Simplified date-time API with no complexity of timezone handling.
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Q 8 - Using lambda expression, you can refer to final variable or effectively final variable (which is assigned only once).
A - false
B - true
Answer : B
Explanation
Using lambda expression, you can refer to final variable or effectively final variable (which is assigned only once).
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Q 9 - Most of the stream operations return stream itself so that their result can be pipelined.
A - false
B - true
Answer : B
Explanation
Most of the stream operations return stream itself so that their result can be pipelined.
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Q 10 - Optional.orElse method returns the value if present otherwise returns the default value passed.
A - false
B - true
Answer : B
Explanation
Optional.orElse method returns the value if present otherwise returns the default value passed.
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java8_questions_answers.htm
