Go through these Object-Oriented Programming interview questions on Functions and Methods to nail your tech interview on Java OOPs concepts. What is constructor overloading in Java? What do you understand about Tokens in Java? When do you use the method finalize() in Java? Can the main() me...
Here the add() method has different parameters in the Addition class is overloaded in the same class as with the super-class. Note: Polymorphism is not applicable for method overloading. Q #15) What is meant by Interface? Answer: Multiple inheritances cannot be achieved in java. To overcom...
11. Difference between Overloading and Overriding in Java?( former take place at compile time, later happens at runtime, only virtual method can be overridden, static, final and private method can't be overridden in Java. for more in-depth discussion, seethispost) 12. What kind of referen...
This method only checks if the classname we have passed is equal to java.lang.Math. The class java.lang.Math is loaded by the bootstrap ClassLoader. This class is an abstract class.This class loader is responsible for loading classes. Every Class object contains a reference to the ClassLoad...
<bean id=“emp” class=“com.javatpoint.Employee” autowire=“byName” /> The autowiring modes are given below: No. Mode Description 1) no this is the default mode, it means autowiring is not enabled. 2) byName Injects the bean based on the property name. It uses setter method. 3...
In method overloading, return type can or can not be be same, but we must have to change the parameter.While in this, return type must be same or co-variant. 2. JAVA How to prevent a class to be extended? simply use keywordfinalin definition of class or methods. for example: ...
Compile-time polymorphismis method overloading. Run-time polymorphismuses inheritance and interface. What does an interface in Java refer to? An interface as it relates to Java is a blueprint of a class or a collection of abstract methods and static constants. ...
33 . What is method overloading? 34 . What is method overriding? 35 . Can super class reference variable can hold an object of sub class? 36 . Is multiple inheritance allowed in Java? 37 . What is an interface? 38 . How do you define an interface?
Why doesn't method overloading work as I expect it? Why doesn't method overriding work as I expect it? Coping With Legacy What happens when I mix generic and non-generic code? Should I re-engineer all my existing classes and generify them?
Answer: DataReader represents only one database record at a time. You must call the Read() method to fetch each new record from the underlying database table into memory. Each time you call Read() again, the previously fetched record is lost. DataSet is on the other hand, enables you ...