Java 8 Interview Questions and Answers For Freshers Part-3
21.What is the purpose of IntSupplier functional interface? It represents a supplier of int-valued results.
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11.What is the purpose of DoublePredicate functional interface? It represents a predicate (Boolean-valued function) of one double-valued argument.
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1.What are functional interfaces? Functional interfaces have a single functionality to exhibit. For example, a Comparable interface with a single method ‘compareTo’ is used for comparison purpose. Java 8 has defined a lot of functional interfaces to be used extensively…
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1.What is JVM? The Java interpreter along with the runtime environment required to run the Java application in called as Java virtual machine(JVM) 2. What is the most important feature of Java? Java is a platform independent language. 3. What…
Read MoreBest Java Development FrameWork
1.Struts2 Apache Struts 2 is an enterprise-ready web framework for Java application. It has been designed to streamline the entire development cycle starting from building to deploying. Struts 2 is a combined effort of WebWork and Struts communities. Unlike conventional…
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java.io: For input and output of data. java.lang: It is used for providing core functionality. java.lang.ref: It is used to enable interaction with garbage collector. java.lang.reflect: It is used to analyze code at run time. java.applet: For creating applets. java.awt:…
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1.which two method you need to implement for key object in HashMap? In order use any object as key in HashMap,it must implements equals and hashcode method in java.Read how HashMap works in java…
Read MoreWhat is the difference between a constructor and a method
What is the difference between a constructor and a method? A constructor is a member function of a class that is used to create objects of that class. It has the same name as the class itself, has no return…
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