Java OCA OCP Practice Question 97

Question

Which of the following statements is correct? (Choose one.)

  • A. Only primitives are converted automatically; to change the type of an object reference, you have to do a cast.
  • B. Only object references are converted automatically; to change the type of a primitive, you have to do a cast.
  • C. Arithmetic promotion of object references requires explicit casting.
  • D. Both primitives and object references can be both converted and cast.
  • E. Casting of numeric types may require a runtime check. 


D.

Note

D is correct because in Java primitives and object references can be both converted and cast.

A and B are wrong because they contradict D.

C is wrong because objects do not take part in arithmetic operations.

E is wrong because only casting of object references potentially requires a runtime check.




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