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Java Useful Resources
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.
Q 1 - Which of the following functional interface represents an operation that accepts two input arguments, and returns no result?
Answer : A
Explanation
BiConsumer<T,U> functional interface represents an operation that accepts two input arguments, and returns no result.
Q 2 - Which of the following functional interface represents an operation that accepts a single double-valued argument and returns no result?
Answer : D
Explanation
DoubleConsumer functional interface represents an operation that accepts a single double-valued argument and returns no result.
Q 3 - Which of the following functional interface represents an operation upon two int-valued operands and produces an int-valued result?
Answer : D
Explanation
FunctionIntBinaryOperator functional interface represents an operation upon two int-valued operands and produces an int-valued result.
Q 4 - Which of the following functional interface represents an operation on a single long-valued operand that produces a long-valued result?
Answer : C
Explanation
LongUnaryOperator functional interface represents an operation on a single long-valued operand that produces a long-valued result.
Q 5 - Which of the following functional interface represents a function that accepts two arguments and produces an int-valued result?
Answer : C
Explanation
ToIntBiFunction<T,U> functional interface represents a function that accepts two arguments and produces an int-valued result.
Q 6 - Which of the following is correct about streams in java8?
A - Stream represents a sequence of objects from a source, which supports aggregate operations.
B - Most of the stream operations return stream itself so that their result can be pipelined.
Answer : C
Explanation
Both of the above options are correct.
Q 7 - Which of the following API represents a specialized date-time API to deal with various timezones in java8?
Answer : B
Explanation
Zoned − Specialized date-time API to deal with various timezones.
Q 8 - Which of the following method of Base64 class returns a Base64.Decoder that decodes using the URL and Filename safe type base64 encoding scheme?
Answer : A
Explanation
getUrlDecoder() method of Base64 class returns a Base64.Decoder that decodes using the URL and Filename safe type base64 encoding scheme.
Answer : A
Explanation
Method references help to point to methods by their names.
Q 10 - In which of the following type of Base64 encoding, Output is mapped to a set of characters lying in A-Za-z0-9+/?
Answer : A
Explanation
Simple − Output is mapped to a set of characters lying in A-Za-z0-9+/.
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