← NestJS 12: @Optional() Not Inherited by a Redeclared ConstructorQuiz
NestJS 12: @Optional() and Subclass Inheritance
Test yourself on NestJS 12's @Optional() metadata rule: which subclasses are actually at risk, what changed, and how to fix one correctly.
questions7
pass mark70%
resultsat the end
No account needed. Answer all 7 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.