Java Consultant Interview Questions and Answers

XPath allows selection of multiple elements using logical operators and functions for efficient querying.

• Use '|' operator to combine multiple XPath expressions. Example: //div | //span selects all divs and spans.

• Utilize predicates to filter elements. Example: //div[@class='example'] | //span[@id='test'] selects specific divs and spans.

• Use 'or' within predicates for multiple conditions. Example: //div[@class='example' or @class='sample'] selects divs with either class.

• Leverage...read more

A Spring Boot application bootstraps by creating an embedded server and initializing the application context.

• Spring Boot uses embedded servers like Tomcat, Jetty, or Undertow to run the application.

• The application context is initialized by scanning for components, configurations, and auto-configurations.

• Spring Boot auto-configures many features based on dependencies and properties in the application.

This code demonstrates how to reverse a string in Java using a simple method.

• Use StringBuilder for efficient string manipulation. Example: StringBuilder sb = new StringBuilder(originalString);

• Call the reverse() method on StringBuilder. Example: sb.reverse();

• Convert StringBuilder back to String. Example: String reversedString = sb.toString();

• Consider edge cases like empty strings or single-character strings.

OOPs concepts refer to the principles of Object-Oriented Programming that help in designing and implementing software systems.

• Encapsulation - bundling of data and methods that operate on that data

• Inheritance - ability of a class to inherit properties and methods from its parent class

• Polymorphism - ability of objects to take on multiple forms

• Abstraction - hiding of complex implementation details from the user