ITC Infotech Java Developer Interview Questions and Answers

This code counts the number of vowels in a given string, helping to analyze text data effectively.

• Character Iteration: Loop through each character in the string to check if it is a vowel.

• Vowel Check: Use a set of characters (e.g., 'a', 'e', 'i', 'o', 'u') to determine if a character is a vowel.

• Case Insensitivity: Convert the string to lower case to ensure that both uppercase and lowercase vowels are counted.

• Count ...read more

Java is a versatile programming language used for building applications across various platforms.

• Object-Oriented: Java is based on OOP principles, allowing for code reusability and modularity. Example: Classes and objects.

• Platform Independence: Java code is compiled into bytecode, which can run on any device with a Java Virtual Machine (JVM).

• Rich API: Java provides a comprehensive set of libraries for tasks like n...read more

HTML (HyperText Markup Language) is the standard language for creating web pages and web applications.

• HTML uses tags to structure content, e.g., <h1> for headings, <p> for paragraphs.

• Attributes in HTML tags provide additional information, e.g., <img src='image.jpg' alt='description'>.

• HTML forms allow user input, e.g., <form><input type='text' name='username'></form>.

• Semantic HTM...read more

Controller is a class that handles user requests and returns appropriate response. Rest controller is a specialized controller for RESTful web services.

• Controller is a class in MVC architecture that handles user requests and interacts with the model and view.

• Rest controller is a specialized controller in Spring framework for building RESTful web services.

• Rest controller uses annotations like @RestController and @R...read more

HashMap is a data structure that stores key-value pairs and uses hashing to efficiently retrieve values.

• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to find the index in the array where it will be stored.

• If multiple keys hash to the same index, a linked list is used to handle collisions.

• HashMap allows null keys and values, but only one ...read more

Use CSS to change the background color of a div element.

• Use the 'background-color' property in CSS to specify the color.

• You can use color names, hex codes, RGB values, or HSL values to set the background color.

• Example: div { background-color: blue; }

Java Class Library is a collection of pre-compiled classes and methods that provide ready-to-use functionality for Java developers.

• Java Class Library contains classes for common tasks like input/output, networking, database access, etc.

• Developers can use these classes to save time and effort by reusing existing code.

• Examples include java.lang, java.util, java.io, java.net, etc.

OOPs concept is a programming paradigm based on the concept of objects, Spring Boot is a framework for building Java applications.

• OOPs concept stands for Object-Oriented Programming, which focuses on creating objects that interact with each other to solve problems.

• It involves concepts like inheritance, encapsulation, polymorphism, and abstraction.

• Spring Boot is a framework that simplifies the development of Java a...read more