Java Online Training Institutes Java was developed by aims at providing a cross platform environment for software applications. Java is a very popular and extensively used programming language for developing applications ranging from mobile applications to enterprise servers and supercomputers. Any code developed in Java for any web application can be used again for a […]
Core Java Interview Questions Java language was discovered by James Gosling of Sun Micro systems in 1991. Although C, C++ like programming languages were present in the market but due to fix platform constraint, web developers were unable to develop high end applications. Java has removed this constraint by being completely platform independent, secure, robust, […]
Java Questions And Answers For Interview 1.What is Singleton? is it better to make whole method synchronized or only critical section synchronized ? ANSWER: Singleton in Java is a class with just one instance in whole Java application, for example java.lang.Runtime is a Singleton class. Creating Singleton was tricky prior Java 4 but once Java […]
Questions And Answers For Java Interview 1.What is the difference between a constructor and a method? ANSWER: 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 type, and is invoked using the new operator. […]
Java Interview Questions For Experienced 1.Why main() in java is declared as public static void main? What if the main method is declared as private? ANSWER: Public :- main method is called by JVM to run the method which is outside the scope of project therefore the access specifier has to be public to permit […]
Java Interview Questions For Freshers 1.What is the difference between an Interface and an Abstract class? ANSWER: Abstract class can have instance methods that implement a default behavior. An Interface can only declare constants and instance methods, but cannot implement default behavior and all methods are implicitly abstract. An interface has all public members and […]
JavaScript Interview Question and Answers 1. What is JavaScript? ANS: JavaScript is a general-purpose programming language designed to let programmers of all skill levels control the behavior of software objects. The language is used most widely today in Web browsers whose software objects tend to represent a variety of HTML elements in a document and […]
Java Interview Questions and Answers 1. What gives java it’s “write once and run anywhere” nature? ANS: All Java programs are compiled into class files that contain byte codes. These byte codes can be run in any platform and hence java is said to be platform independent. 2. Explain working of Java Virtual Machine (JVM)? […]
Java Static Interview Questions and Answers 1. When to use static operations? ANS: Static context is necessary is during program start-up because the Java entry point method is static. This means that variables and methods required during start-up may need to be static too, but the principle should be to create a primary core object […]
What is Java Static? Types of Static Methods? Java applications use Object Oriented development. In an Object Oriented project, programmers design a set of objects to carry out specific sections of the tasks required. When programmers create Java class declarations, they can opt to use the static keyword for both variables and methods. When we […]
Core Java Interview Question and Answers 1) What is the most important feature of Java? A) Java is a platform independent language. 2) What do you mean by platform independence? A) Platform independence means that we can write and compile the java code in one platform (eg Windows) and can execute the class in any […]