Explain what a record is, what it generates, and where a record is the wrong choice.

A record (Java 16) is a transparent carrier for immutable data: from the header it generates final fields, a canonical constructor, accessors, and value-based equals/hashCode/toString.

It is ideal for DTOs, value objects, and multiple return values. It is the wrong choice when you need mutability, want to hide or transform internal representation, need inheritance (records are implicitly final and extend Record), or when equality should be identity-based rather than component-based.