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 - New compiler tools and utilities are added like 'jdeps' to figure out dependencies.
B - New stream API to facilitate pipeline processing is added.
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 function that accepts one argument and produces a result?
Answer : C
Explanation
Function<T,R> functional interface represents a function that accepts one argument and produces a result.
Q 4 - Which of the following functional interface represents an operation that accepts an object-valued and a double-valued argument, and returns no result?
Answer : D
Explanation
ObjDoubleConsumer<T> functional interface represents an operation that accepts an object-valued and a double-valued argument, and returns no result.
Q 5 - Which of the following functional interface represents a function that accepts two arguments and produces a long-valued result?
Answer : A
Explanation
ToLongBiFunction<T,U> functional interface represents a function that accepts two arguments and produces a long-valued result.
Q 6 - What is the purpose of limit method of stream in java 8?
A - Iterate each element of the stream.
B - Map each element to its corresponding result.
Answer : D
Explanation
The 'limit' method is used to reduce the size of the stream.
Q 7 - Which of the following is correct about collectors in java8?
A - Collectors are used to combine the result of processing on the elements of a stream.
Answer : C
Explanation
Both of the above options are correct.
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 - Stream supports aggregate operations like filter, map, limit, reduce, find and match.
Answer : B
Explanation
Stream supports aggregate operations like filter, map, limit, reduce, find, match, and so on.
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+/.
