Top 40+ Spring Boot Interview Questions and Answers [2026]
Master 40+ Spring Boot interview questions, from basics to advanced, to boost your Java, microservices, and application development skills.
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Master 40+ Spring Boot interview questions, from basics to advanced, to boost your Java, microservices, and application development skills.
Not a getting-started guide. The opinionated patterns teams converge on once the novelty wears off and the suite has to run in CI a hundred times a day. Every Testcontainers tutori...
Spring Boot REST APIs are commonly documented using tools such as Swagger/OpenAPI. Another useful option is Spring REST Docs, which generates API documentation from tests. In this...
Explore key Spring interview questions for beginners and experienced developers to prepare effectively and succeed in Java backend and full-stack roles.
Learn how to upgrade the Spring Framework version in a Spring Boot application by understanding dependency management, selecting a compatible Boot release, and verifying the resolv...
JUnit 5's @Nested annotation groups related test methods, such as login and registration checks, into non-static inner classes for cleaner test code.
Spring + Jev, and the real use of unit testing. The post Java Weekly, Issue 667 first appeared on Baeldung.
Kotlin unit testing tutorial: set up JUnit 5 in IntelliJ IDEA with Gradle, write your first test, measure coverage, and mock dependencies with Mockito.
Teams considering or committed to adopting Kotlin often plan a migration as a series of rewrites, swapping Java services for Kotlin counterparts one microservice at a time. In prac...
Add the TestNG Maven dependency to pom.xml with test scope, the Gradle equivalent, Surefire setup for testng.xml, Selenium alongside it, and common fixes.
Spring Boot is widely used for building REST APIs and backend applications in Java. When an application needs persistent storage, Spring Boot can connect to traditional databases s...
Modern applications usually depend on several APIs and microservices. During development and testing, however, those dependencies may not always be available. A downstream service...
Learn Cucumber Java with this tutorial covering keywords, hooks, and practical steps to start efficient BDD testing from scratch.
The JUnit Maven dependency for JUnit 5 and 6: junit-jupiter coordinates, the artifacts you need, junit-bom, Surefire and Gradle setup, and common errors.
Build a JUnit test suite with @Suite, @SelectClasses, @SelectPackages, and @IncludeTags, run it from Maven, Gradle, and the IDE, and migrate JUnit 4 suites.
How we made screen JSON testable on the JVM; same engine as production, Kotlin/JUnit for authors, and coverage JaCoCo cannot see.Continue reading on Medium »
There was a flurry of activity during the week of September 21st, 2026, highlighting: second milestone releases of: Spring Boot, Spring Batch, Spring Security, Spring AMQP, Spring...
Learn about MCP logging in Spring AI, both in an MCP server and a client. The post MCP Logging in Spring AI first appeared on Baeldung.
Unit testing business logic often requires surprisingly little business data. Suppose we want to test a program that loads an order, calculates its total, and rejects it when the a...
The Model Context Protocol (MCP) lets an AI application call out to external tools and data sources through a standard client-server interface. When a tool runs on the server, the...
Test exceptions in JUnit 5 and 6 with assertThrows, assertThrowsExactly, and assertDoesNotThrow, check messages and causes, and migrate JUnit 4 @Test(expected).
Ask any backend developer what they hate most about maintaining a REST API, and somewhere near the top of the list you’ll hear “the docs are lying again.” Someone changed a field n...
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