List of Interview Questions on Java for freshers and experienced candidates asked in technical job interviews in IT Industries. This list includes interview questions asked to freshers, 2,3 and 5 years etc. experience professionals | Only Real.
This section contains technical java interview questions and answers for freshers and experienced on java Polymorphims, Java OOPs concept Inheritance, Interface, abstract class, abstraction and encapsulation, classes and objects etc. with impressive answers and explanation. In fact, interview question on many topics I have provided that you should read or brush up that help crack java technical java interviews quickly.
Answer includes order of execution of constructors in Java inheritance hierarchy when we create child class object with java program single inheritance example and multilevel inheritance. Answer: Order of execution of constructors in inheritance relationship is from base /parent class to derived / child Read more →
Multiple inheritance in Java programming is achieved or implemented using interfaces. Java does not support multiple inheritance using classes. In simple term, a class can inherit only one class and multiple interfaces in a java programs. In java terminology, we can say that “A Read more →
Answer of what is difference between constructor and method in JAVA programming includes differences with code example. Interview question: Explain difference between constructor and method of a class in java program. explain your points with code by writing a simple class. Also, write code Read more →
Why Java main method is static and public is a frequently asked interview question generally asked to freshers candidate. To answer why java main method is static, it is good to know the concept of static method and instance method in Java. However, it Read more →
Answer: Java static variable is a variable that is preceded by static keyword and is shared by all the objects of a class. Declaration of an static variable is like below example private static int customerObjectCount = 0; Below class shows how to declare Read more →
Answer: Static method in Java programming is a method of a class that is preceded by static keyword. For example, static method is declared as below //Static function public static void LogError() Static method belongs to a class not to the object. So, we Read more →
There are 2 ways to stop or prevent inheritance in Java programming. By using final keyword with a class or by using a private constructor in a class. How to prevent class from being inherited in java is one of the important technical interview Read more →
We should use StringBuffer for multi-threaded java program or else Stringbuilder class. The difference between StringBuffer and StringBuilder class in java is that StringBuffer is synchronized, whereas, StringBuilder is not. In multithreading application, if a buffer is shared among multiple threads, then we should Read more →
Literals in Java programming is a constant value which is compatible to a data type, programmers assign to a variable that compiler understand. It is used to assign a value to variables, to compare values or define constants. Literals are often used to initialize Read more →
Answer: No, we don’t have static constructor in java. Actually, java static constructor concept is not there. When we make a class constructor static, compiler will flash an error i.e. “Illegal modifier for the constructor in type MyClass; only public, protected & private are Read more →