Top 20 Hibernate Interview Questions for Java J2EE Programmers

Hibernate is one of the most popular persistent frameworks in Java world. Hibernate offers object to relational (ORM) solution which frees Java developers from writing tedious, hard to read and cluttered JDBC code converting SQL columns into Object properties. Apart from freeing Java developer from writing JDBC and database interaction code, Hibernate also offers the out-of-box solution on caching, proxying and lazy loading which drastically improves the performance of your Java Web application. Given it's important in Java Web application development field Hibernate has become of one of the  most sought after skill and goes hand in hand with Spring framework. That's why Hibernate interview questions are also very popular in Java interviews. Earlier I have shared some Spring MVC interview questions and due to popular demand, I am now sharing 20 odd Hibernate questions from various Java interviews.

How to convert LinkedList to array in Java? Example

You can convert a LinkedList to an array in Java by using the toArray() method of LinkedList. The toArray() method accepts an array of relevant type to store contents of LinkedList. It stores the elements in the same order they are currently inside LinkedList. By using the toArray() method you can convert any type of LinkedList e.g. Integer, String or Float to any type of Array, only catch is this you cannot convert a LinkedList to an array of primitives i.e. a LinkedList of Integer cannot be converted into an array of ints by using using toArray() method, but you can convert it to array of Integer objects, that's perfectly ok. Similarly, you can convert LinkedList of Double to an array of Double and LinkedList of Float objects to an array of floats.

What is Inheritance in Java with example - Object Oriented Programming Tutorial

What is Inheritance in Java
Inheritance in Java or OOPS (Object oriented programming) is a feature which allows coding reusability.  In other words, Inheritance  self-implies inheriting or we can say acquiring something from others. Along with Abstraction, Encapsulation and Polymorphism, Inheritance forms the backbone of Object oriented programming and Java.  In Java, we use the term inheritance when one object acquires some property from other objects. In Java, inheritance is defined in terms of superclass and subclass. it is normally used when some object wants to use existing feature of some class and also want to provide some special feature, so we can say inheritance has given the advantage of reusability.