Greeksoft Technologies Software Developer Interview Questions and Answers for Experienced

Solid Principles are a set of design principles for writing maintainable and scalable software.

• Solid Principles consist of five principles: Single Responsibility Principle, Open/Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle.

• Single Responsibility Principle states that a class should have only one reason to change.

• Open/Closed Principle states that sof...read more

Abstraction focuses on hiding implementation details, while interface defines a contract for classes to follow.

• Abstraction allows us to focus on the essential features of an object, while hiding unnecessary details.

• Interface defines a set of methods that a class must implement, providing a contract for how the class should behave.

• Abstraction is achieved through abstract classes and interfaces in object-oriented program...read more

Solid Principles are a set of design principles for writing maintainable and scalable software.

• Solid Principles consist of five principles: Single Responsibility Principle, Open/Closed Principle, Liskov Substitution Principle, Interface Segregation Principle, and Dependency Inversion Principle.

• Single Responsibility Principle states that a class should have only one reason to change.

• Open/Closed Principle states that sof...read more

Abstraction focuses on hiding implementation details, while interface defines a contract for classes to follow.

• Abstraction allows us to focus on the essential features of an object, while hiding unnecessary details.

• Interface defines a set of methods that a class must implement, providing a contract for how the class should behave.

• Abstraction is achieved through abstract classes and interfaces in object-oriented program...read more

Servlet and JSP life cycle involves initialization, request processing and destruction.

• Servlet life cycle includes init(), service() and destroy() methods.

• JSP life cycle includes translation, compilation, initialization, and request processing.

• Servlet container manages the life cycle of servlets and JSPs.

• Servlet and JSP objects are created and initialized during initialization phase.

• During request processing phase, ser...read more

JDBC is a Java API for connecting to and interacting with databases.

• JDBC stands for Java Database Connectivity.

• It provides a standard interface for connecting to databases.

• JDBC drivers are used to connect to specific databases.

• JDBC can be used to execute SQL queries and retrieve results.

• Example: Class.forName("com.mysql.jdbc.Driver"); Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb","userna