Java 8 Online Quiz
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 : B
Explanation
BiFunction<T,U> functional interface represents an operation that accepts two input arguments, and returns a result.
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Answer : B
Explanation
Consumer<T> functional interface represents an operation that accepts a single input argument and returns no result.
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Answer : B
Explanation
IntFunction<R> functional interface represents a function that accepts an int-valued argument and produces a result.
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Answer : B
Explanation
LongToIntFunction functional interface represents a function that accepts a long-valued argument and produces an int-valued result.
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Answer : B
Explanation
ToLongFunction<T> functional interface represents a function that produces a long-valued result.
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Answer : A
Explanation
Stream has provided a new method 'forEach' to iterate each element of the stream.
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Answer : C
Explanation
Both of the above options are correct.
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Answer : A
Explanation
getDecoder() method of Base64 class returns a Base64.Decoder that decodes using the Basic type base64 encoding scheme.
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Q 9 - Optional object is used to represent non null value with absent value.
A - true
B - false
Answer : B
Explanation
Optional object is used to represent null with absent value.
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Q 10 - java.util.Date is not thread safe, thus developers have to deal with concurrency issue while using date.
A - true
B - false
Answer : A
Explanation
java.util.Date is not thread safe, thus developers have to deal with concurrency issue while using date.
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