What is array and arraylist in java?
Is there is any error if you have multiple main methods in the same class?
Explain Basics of OOP Language in java
What is a Java package and how is it used?
How the elements are organized in CardLayout?
What is the java project architecture?
Does the order of public and static declaration matter in main method?
I want to persist data of objects for later use. What is the best approach to do so?
What is the file extension for java?
How to perform selection sort in java?
How many types of threads are there in java?
What are the notations in Java?
What are the differences between heap and stack memory?