The correct answer to the question “Which of the following is not OOPS concept in Java” is option (d). Because there are 4 OOPS concepts in Java, and they are: Inheritance, Encapsulation, Polymorphism, And Abstraction. And Compilation is not a part of the OOPS concept in Java. If you wish to learn and get certified, in Java, check out the Java certification course from Intellipaat. Also, watch the following video on Java Interview Questions, this might help you aid your Interview preparation.