Silver Touch Technologies Java Developer Interview Questions and Answers

ALTER modifies database structure; UPDATE changes existing data in a table.

• ALTER is used to change the structure of a database object (e.g., table, view). Example: ALTER TABLE Employees ADD COLUMN age INT;

• UPDATE is used to modify existing records in a table. Example: UPDATE Employees SET age = 30 WHERE name = 'John';

• ALTER can add, delete, or modify columns and constraints, while UPDATE only changes data in existing row...read more

OOPs (Object-Oriented Programming) is a programming paradigm based on the concept of objects, which can contain data and code.

• OOPs focuses on creating reusable code by organizing it into objects that interact with each other.

• Key principles of OOPs include encapsulation, inheritance, and polymorphism.

• Collections in Java are data structures that store and manipulate groups of objects.

• Examples of collections in Java inclu

Solid design principles are a set of best practices for designing software that is maintainable, scalable, and flexible.

• Single Responsibility Principle: Each class should have only one responsibility.

• Open/Closed Principle: Classes should be open for extension but closed for modification.

• Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without affecting the prog...read more

Spring Boot is a popular Java framework for building microservices, while functional interfaces in Java 8 allow for functional programming.

• Spring Boot simplifies the process of building and deploying microservices by providing a set of pre-configured tools and conventions.

• Functional interfaces in Java 8 enable the use of lambda expressions to write more concise and readable code.

• Combining Spring Boot with functional in...read more