Clover Infotech Senior Software Engineer Interview Questions, Process, and Tips

There are three types of variables in Java: local, instance, and static.

• Local variables are declared within a method or block and have limited scope.

• Instance variables are declared within a class but outside of any method and are accessible to all methods of the class.

• Static variables are declared with the static keyword and are shared among all instances of the class.

• Examples: int x; //instance variable, static int y;...read more

Hibernate is an ORM tool used to map Java objects to database tables.

• Hibernate simplifies database access by abstracting the JDBC API

• It provides a framework for mapping an object-oriented domain model to a relational database

• Hibernate supports lazy loading, caching, and transaction management

• It reduces the amount of boilerplate code needed for database operations

• Hibernate is widely used in enterprise Java applications

Java is a high-level, object-oriented programming language used for developing desktop, web, and mobile applications.

• Java is platform-independent and can run on any operating system

• It is known for its security features and memory management

• Java code is compiled into bytecode which can be executed on any Java Virtual Machine (JVM)

• Java has a vast library of pre-built classes and APIs for developers to use

• Popular framewor...read more

The 4 pillars of OOP are encapsulation, inheritance, polymorphism, and abstraction.

• Encapsulation: bundling data and methods together in a class, hiding internal details.

• Inheritance: creating new classes from existing ones, inheriting properties and behaviors.

• Polymorphism: objects of different classes can be treated as objects of a common superclass.

• Abstraction: simplifying complex systems by breaking them down into sma