Master Java Web Services and REST API with Spring Boot- Step 6: Dynamic auto wiring and Troubleshooting - @Primary

The video tutorial explains the background processes in a Spring application, focusing on how Spring manages components and dependencies. It discusses the use of annotations like @Component and @Primary to resolve conflicts when multiple components of the same type exist. The tutorial also covers troubleshooting common Spring context issues, such as bean creation errors, and provides tips for resolving these problems effectively.

What happens when you annotate both Quicksort and Bubble Sort algorithms with @Component?

• Spring throws an error due to multiple components of the same type.

• Spring automatically chooses the first component it finds.

• Spring combines both components into one.

• Spring ignores one of the components.

How can you prioritize one component over another when both are of the same type?

• By using the @Component annotation.

• By using the @Primary annotation.

• By using the @Autowired annotation.

• By using the @Qualifier annotation.

Which annotation is crucial for resolving multiple bean conflicts in Spring?

• @Autowired

• @Component

• @Primary

• @Qualifier

What is the result of removing the @Component annotation from all components?

• Spring will use the last known configuration.

• Spring will not find any beans and throw an exception.

• Spring will create default beans.

• Spring will automatically generate components.

What should you check if Spring throws a 'no such bean exception'?

• Ensure all components have the @Component annotation.

• Check if the application context is correctly configured.

• Verify that the @Primary annotation is used.

• Make sure the @Autowired annotation is present.