ZKTeco Biometrics Java Developer Interview Questions and Answers

OOPs concepts refer to Object-Oriented Programming principles like Inheritance, Encapsulation, Polymorphism, and Abstraction.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hiding the complex implementation detail

Exceptions in Spring Boot can be handled using @ExceptionHandler annotation, @ControllerAdvice annotation, and custom exception classes.

• Use @ExceptionHandler annotation to handle exceptions at the controller level.

• Use @ControllerAdvice annotation to handle exceptions globally across all controllers.

• Create custom exception classes by extending RuntimeException or Exception classes and use them to handle specific excepti...read more

Spring MVC is a framework for building web applications in Java, based on the Model-View-Controller design pattern.

• Spring MVC provides a way to structure your web application using a Model-View-Controller architecture.

• It allows for easy integration with other Spring frameworks like Spring Boot and Spring Security.

• Controllers handle incoming requests, process them, and return a response.

• Views are responsible for renderi...read more