Data Template Infotech Interview Questions and Answers for Experienced

Object-oriented programming concepts that help in designing and implementing software systems.

• Encapsulation: bundling data and methods together

• Inheritance: creating new classes from existing ones

• Polymorphism: using a single interface to represent different types

• Abstraction: hiding complex implementation details

• Encapsulation: grouping related data and methods together

• Association: relationship between classes

• Composition:...read more

Annotations used in Spring Boot applications

• 1. @RestController - Marks a class as a controller that handles HTTP requests

• 2. @RequestMapping - Maps HTTP requests to handler methods

• 3. @Autowired - Injects dependencies into a bean

• 4. @Service - Marks a class as a service component

• 5. @Repository - Marks a class as a repository component

• 6. @Component - Marks a class as a generic Spring component

• 7. @Configuration - Indicates ...read more

Abstract classes and methods in Java provide a way to define common behavior that can be inherited by subclasses.

• An abstract class is a class that cannot be instantiated and is meant to be extended by other classes.

• An abstract method is a method that is declared without an implementation in an abstract class.

• Subclasses of an abstract class must provide an implementation for all abstract methods.

• Abstract classes can hav...read more