Spring Core · interview question
Which annotation would you use to ensure that a field in a Spring Boot controller method is not blank?
Multiple choiceEasychapter-9-curatedpremiumspring-corepersistence-and-validation
Answer and explanation
Correct answer
D. @NotBlank
Why
The @NotBlank annotation ensures that a string is not null, and not just whitespace. It is specifically used for strings, while @NotNull and @NotEmpty have different uses.
Test yourself on Spring Core
A free test with instant, explained results. No account needed.
More Spring Core questions
- In a Spring Boot application, what happens if a method annotated with @Transactional calls a private method also…
- Which layer should coordinate inventory checks, payment, and order persistence for a checkout request?
- What role do Entities typically play in a Spring Boot application?
- How can you externalize configuration in a Spring Boot application?
- Which issue might arise from using field injection in Spring Boot, particularly when managing dependencies?
- In a Spring Boot application, what is the main purpose of the @ComponentScan annotation?