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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 class. We know that when we create an object of a…
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 class can extend only one class but it can implement multiple…
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 how constructor initializes objects. Answer: Constructor Vs Method Point-1: Constructor must…
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 is briefly written in the answer. Answer: Java main method is…
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 static and non-static variable in Java. Static variable in…
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 can call static method of a class by using class name…
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 questions for which we need to detail all possible solutions. Problem…
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 consider using StringBuffer as all of its methods are synchronized and…
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 variables. Literals represent numerical (integer or floating-point), character, boolean or string…
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 permitted”. In below example, at the compile time itself compiler will…