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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 a predicate (Boolean-valued function) of two arguments?
Answer : D
Explanation
BiPredicate<T,U> functional interface represents a predicate (Boolean-valued function) of two arguments.
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 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 an operation that accepts an object-valued and an int-valued argument, and returns no result?
Answer : A
Explanation
ObjIntConsumer<T> functional interface represents an operation that accepts an object-valued and an int-valued argument, and returns no result.
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.
Q 7 - Which of the following API represents a simplified date-time API with no complexity of timezone handling in java8?
Answer : A
Explanation
Local − Simplified date-time API with no complexity of timezone handling.
Q 8 - Which of the following is the correct lambda expression which add two numbers and return their sum?
Answer : C
Explanation
Both of the above options are correct.
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.
Q 10 - In which of the following type of Base64 encoding, Output is mapped to MIME friendly format?
Answer : C
Explanation
MIME − Output is mapped to MIME friendly format. Output is represented in lines of no more than 76 characters each, and uses a carriage return '' followed by a linefeed ' ' as the line separator. No line separator is present to the end of the encoded output.