Which class is considered the cosmic superclass in Java?

Which class is considered the cosmic superclass in Java?

• A. Object
• B. Root
• C. Base
• D. Ancestor

Answer: (A)

Java has a single universal superclass at the top of the type hierarchy. All non-primitive classes you write implicitly extend this root type, even if you don’t specify a superclass. That root type is java.lang.Object, which provides basic methods such as toString, equals, hashCode, and getClass. Because every reference type ultimately inherits from Object, it acts as the cosmic superclass in Java. There isn’t a higher common superclass, and names like Root, Base, or Ancestor aren’t the built-in root in Java.

Java has a single universal superclass at the top of the type hierarchy. All non-primitive classes you write implicitly extend this root type, even if you don’t specify a superclass. That root type is java.lang.Object, which provides basic methods such as toString, equals, hashCode, and getClass. Because every reference type ultimately inherits from Object, it acts as the cosmic superclass in Java. There isn’t a higher common superclass, and names like Root, Base, or Ancestor aren’t the built-in root in Java.