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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 is correct about Java8?
A - Lambda expression - Adds functional processing capability to Java.
C - Default method - Interface to have default method implementation.
Answer : D
Explanation
All of the above options are correct.
Q 2 - Which of the following functional interface represents a supplier of double-valued results?
Answer : C
Explanation
DoubleSupplier functional interface represents a supplier of double-valued results.
Q 3 - Which of the following functional interface represents a supplier of int-valued results?
Answer : D
Explanation
IntPredicate functional interface represents a supplier of int-valued results.
Q 4 - Which of the following functional interface represents an operation upon two long-valued operands and produces a long-valued result?
Answer : D
Explanation
LongBinaryOperator functional interface represents an operation upon two long-valued operands and produces a long-valued result.
Q 5 - Which of the following functional interface represents a predicate (Boolean-valued function) of one argument?
Answer : C
Explanation
Predicate<T> functional interface represents a predicate (Boolean-valued function) of one argument.
Q 6 - What is the purpose of filter method of stream in java 8?
A - Iterate each element of the stream.
B - Map each element to its corresponding result.
Answer : C
Explanation
The 'filter' method is used to eliminate elements based on a criteria.
Answer : A
Explanation
Yes! Using ScriptEngineManager, JavaScript code can be called and interpreted in Java.
Q 8 - Which of the following method of Base64 class returns a Base64.Decoder that decodes using the MIME type base64 decoding scheme?
Answer : C
Explanation
getMimeDecoder() method of Base64 class returns a Base64.Decoder that decodes using the MIME type base64 decoding scheme.
Q 9 - A stream provides a set of elements of specific type in a sequential manner.
Answer : A
Explanation
A stream provides a set of elements of specific type in a sequential manner. A stream gets/computes elements on demand. It never stores the elements.
Answer : B
Explanation
Optional.get method gets the value, value should be present.
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