Access Modifiers in Java and its scope?
Learn about Java access modifiers and their scope. Understand how public, private, protected, and default levels control class member visibility.
Where did you use HashMap in your Automation project?
Discover practical use cases of HashMap in Java automation projects. Learn how it simplifies test data handling, locator mapping, and result tracking
Difference between Hash Map and Hash Set?
Learn the key differences between HashMap and HashSet in Java. Understand their roles in key-value mapping vs unique element storage in data handling.
What is Hashmap?
Learn what a HashMap is in Java. Discover how it stores key-value pairs, provides fast data access, and plays a vital role in collection-based programming.
What is the use of constructor in java?
Learn the role of constructors in Java. Understand how they initialize objects, set default values, and automate setup when a class is instantiated.
What are the classes available in a list interface?
Explore the key classes that implement the List interface in Java. Learn how ArrayList, LinkedList, Stack, and Vector support ordered collections.
How to check whether the array is empty and null?
Learn how to check if an array in Java is null or empty. Master safe conditional checks to prevent NullPointerException and ensure valid data processing.
Can we call a non-static variable in static method?
Learn whether a static method in Java can access non-static variables. Discover how instance context affects variable visibility in object-oriented design
Can Constructor be overloaded. Explain why?
Learn how constructors can be overloaded in Java. Discover why using multiple constructors with different parameters improves object flexibility and code clarity
How to define dynamic array?
Learn how to define dynamic arrays in Java using collections like ArrayList. Discover flexible data storage that grows automatically with runtime needs.