Java Enums MCQs with answers Page - 3

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Q. Can enum constants override methods in Java?

  • (A) No, enums are constant and cannot override anything
  • (B) Yes, using anonymous class body
  • (C) Only if declared abstract
  • (D) Only static methods can be overridden

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Q. What will the following code print?

Code: 
enum Direction { NORTH, SOUTH, EAST, WEST }
System.out.println(Direction.NORTH == Direction.valueOf("NORTH"));
  • (A) true
  • (B) false
  • (C) Compile-time error
  • (D) Runtime exception

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Q. What happens if you call `valueOf()` with a name that doesn’t exist in the enum?

  • (A) Returns null
  • (B) Returns the first enum constant
  • (C) Throws IllegalArgumentException
  • (D) Throws NullPointerException

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Q. In which case is the `values()` method available for an enum?

  • (A) Always, as part of java.lang.Enum
  • (B) Only if explicitly defined
  • (C) Available as a compiler-generated static method
  • (D) Never available

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Q. Can enums be declared inside a class in Java?

  • (A) Yes, only if the class is static
  • (B) Yes, both static and non-static classes
  • (C) No, enums must be top-level only
  • (D) Only inside abstract classes

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Q. Which method is implicitly overridden in every enum constant?

  • (A) toString()
  • (B) hashCode()
  • (C) equals()
  • (D) compareTo()

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Q. How do you define custom fields for enum constants?

  • (A) By using static variables only
  • (B) By passing parameters to the enum constructor
  • (C) By overriding the enum class
  • (D) You can't define fields in enums

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Q. What is the visibility of an enum constructor in Java?

  • (A) public
  • (B) protected
  • (C) private or package-private
  • (D) Any access modifier

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Q. Can an enum extend another enum in Java?

  • (A) Yes, if the base enum is abstract
  • (B) Yes, using inheritance
  • (C) No, enums cannot extend any class except Enum
  • (D) Yes, with final keyword

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Q. Which method returns the position of an enum constant in its declaration?

  • (A) ordinal()
  • (B) position()
  • (C) index()
  • (D) value()

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