Question

Can you please help with the Java quesitons below. Thanks.

What is most true about ONE execution of this code? Explain your reasoning to support the correct answer, and also explain why the other answers aren’t correct.

int diffValue = Math.abs(topAv – botAv);
if (diffValue < 10)
  topP.setColor(Color.WHITE);   // Section A
else if (diffValue < 50)
  topP.setColor(Color.GREY);    // Section B
else
   topP.setColor(Color.BLACK);    // Section C

A. Sections A and B may both be executed, but then C can’t be executed.
B. If Section A is executed, then neither Section B nor C can be.
C. All sections can be executed for a single diffValue
D. It’s possible no section is executed for a given diffValue

Answer 1

Option. A is correct bcoz if section A and B is executed then else statement cannot be executed....... For ex for diffValue=9 condition in if statement as well as in if- else statement both will be true hence both section A and B will be executed. But C will not.

Option B is incorrect bcoz for diffValue =9 both section A and B will be executed.

Option C is incorrect bcoz all sections can not executed for a single value of diffValue. If diffValue = 51 then only section C is executed.

Option D is also incorrect one of all three statement has to be executed for a single value of diffValue. For diffValue >=10 and <50 only statement B will be executed... For diffValue>50 section C is executed and for diffValue <10 both A and B is executed.