Java OCA OCP Practice Question 1211

Question

Given the following method declaration, which line can be inserted to make the code?compile? 

public short m(double lat1, double lon1, 
    double lat2, double lon2) { 
    // INSERT CODE HERE 
}
  • A. return new Integer(3);
  • B. return new Byte((byte)6);
  • C. return 5L;
  • D. return new Short(4).longValue(); 


B.

Note

The method m() requires a return type that can be easily converted to a short value.

Options A, C, and D are incorrect because they each use a larger data type that requires an explicit cast.

Option D also does not compile because the Short constructor requires an explicit cast to convert the value of 4, which is assumed to be an int, to a short, as shown in new Short((short)4).

Option B is the correct answer since a byte value can be easily promoted to short and returned by the method.




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