Summary
This chapter explains how core backend technologies—SQL for relational data management, Redis for in-memory caching, Spring Boot for rapid Java application development, REST APIs for standardized web communication, and Java concurrency for multitasking—work together to build scalable server-side applications.

General domain of usage
Java backend development

## Overview of Technologies

You will explore the essential technologies that power modern backend development with Java. Each plays a unique role in building efficient, scalable, and maintainable applications:

- **SQL**: manage and query data in relational databases using structured language;
- **Redis**: store and retrieve data quickly in memory for caching and real-time features;
- **Spring Boot**: create robust Java applications easily with built-in tools and simplified configuration;
- **REST APIs**: connect your application to the outside world using web-based interfaces that follow a standard communication pattern;
- **Concurrency in Java**: handle multiple tasks at the same time, improving performance and responsiveness.

You will learn how these technologies work together to form the foundation of Java backend systems.

Which of the following statements about the technologies introduced in this chapter are correct?

Learn why Java is a powerful and widely used language for backend systems and discover the key technologies used in Java backend development.

This section introduces the essentials of backend development, highlights Java's role in the backend ecosystem, and outlines the key technologies learners will encounter throughout the track.