Spring Core · interview question
What does the @NotBlank annotation ensure in Java Bean Validation?
Multiple choiceEasychapter-9-curatedpremiumspring-corepersistence-and-validation
Answer and explanation
Correct answer
A. The string is not null and not empty
Why
@NotBlank checks that a string is not null and also not empty, meaning it must contain at least one non-whitespace character. It's useful for validating user input where blank strings are not acceptable.
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