LeCiel Trading & Contracting Interview Questions and Answers

There are four main types of OOP concepts: Inheritance, Encapsulation, Polymorphism, and Abstraction.

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

• Encapsulation restricts access to certain components within a class.

• Polymorphism allows objects to be treated as instances of their parent class.

• Abstraction hides the implementation details and only shows the necessary features.

Java is a high-level programming language known for its platform independence and object-oriented features.

• Java is a class-based, object-oriented programming language.

• It is designed to have as few implementation dependencies as possible.

• Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM).

Inheritance is a mechanism in which a new class inherits properties and behaviors from an existing class.

• Allows for code reusability

• Establishes a parent-child relationship between classes

• Derived class can access non-private members of the base class

• Example: Class Car extends Vehicle

Spring MVC is a framework for building web applications in Java.

• Spring MVC stands for Model-View-Controller, providing a way to structure web applications.

• It uses annotations to define controllers, request mappings, and other components.

• Spring MVC supports RESTful web services and integrates with other Spring frameworks like Spring Boot.

• It allows for easy testing of web applications using mock objects and dependency injection.

Spring Boot annotations are used to simplify the configuration and development of Spring applications.

• Annotations like @SpringBootApplication, @RestController, @Autowired, @ComponentScan are commonly used in Spring Boot applications.

• These annotations help in auto-configuration, dependency injection, and component scanning.

• For example, @SpringBootApplication is used to mark the main class of a Spring Boot application.

• Similarly, @RestController is used to define RESTful web ser...read more