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Java Synchronization
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Java Networking
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Java Miscellaneous
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- Java 8 - New Features
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Java APIs & Frameworks
Java Class References
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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 - 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 an int-valued argument and produces a result?
Answer : B
Explanation
IntFunction<R> functional interface represents a function that accepts an int-valued argument and produces a result.
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 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 - How will you call a default method of an interface in a class?
A - Using super keyword along with interface name.
Answer : A
Explanation
Using super keyword along with interface name.
Q 7 - Which of the following is correct about Nashorn in java8?
C - Nashorn uses invokedynamics feature, introduced in Java 7 to improve performance
Answer : D
Explanation
All of the above options are correct.
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.
Answer : A
Explanation
Stream takes Collections, Arrays, or I/O resources as input source.
Q 10 - java.util.Date is not thread safe, thus developers have to deal with concurrency issue while using date.
Answer : A
Explanation
java.util.Date is not thread safe, thus developers have to deal with concurrency issue while using date.