HCLTech Junior Java Developer Interview Questions and Answers for Experienced

C# concepts including abstraction, interface, abstract method, abstract class, polymorphism, encapsulation, inheritance, and serialization.

• Abstraction: hiding implementation details

• Interface: defining a contract for behavior

• Abstract method: method without implementation

• Abstract class: class with one or more abstract methods

• Polymorphism: ability of objects to take on multiple forms

• Encapsulation: bundling data and behavi...read more

DBMS stands for Database Management System. It is a software system that allows users to define, create, maintain and control access to databases.

• DBMS is used to manage large amounts of data efficiently.

• It provides a way to store, retrieve and manipulate data in a structured manner.

• It ensures data integrity and security by providing access control and backup and recovery mechanisms.

• Examples of DBMS include MySQL, Oracl

There are various types of databases such as relational, NoSQL, graph, and document-oriented databases.

• Relational databases store data in tables with predefined relationships between them.

• NoSQL databases are non-relational and can handle unstructured data.

• Graph databases store data in nodes and edges, and are useful for complex relationships.

• Document-oriented databases store data in documents, similar to JSON objects.

• E...read more

Quantum Computing - the latest technology from the field of computer science.

• Quantum computing uses quantum bits (qubits) instead of classical bits for faster computation.

• It has the potential to solve complex problems that classical computers cannot.

• Companies like IBM, Google, and Microsoft are investing heavily in quantum computing research.

• Quantum computing is still in its early stages and has a long way to go before

A software system is a collection of programs, data, and documentation that work together to perform a specific task.

• A software system is designed to solve a particular problem or set of problems.

• It consists of various components such as databases, user interfaces, and application servers.

• Examples of software systems include operating systems, web browsers, and mobile apps.