To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) true true - This option is correct because when comparing f1
and f3
, the reference variables are pointing to the same object, f1
, which was returned from the FizzSwitch
method. Therefore, f1 == f3
is true. Additionally, the x
variable in both f1
and f3
is modified to have a value of 6, so f1.x == f3.x
is also true.
Option B) false true - This option is incorrect because f1
and f3
are pointing to the same object, so f1 == f3
should be true.
Option C) true false - This option is incorrect because f1.x
and f3.x
are both modified to have a value of 6, so f1.x == f3.x
should be true.
Option D) false false - This option is incorrect because f1
and f3
are pointing to the same object, so f1 == f3
should be true. Additionally, f1.x
and f3.x
are both modified to have a value of 6, so f1.x == f3.x
should also be true.
Option E) Compilation fails - This option is incorrect because there are no compilation errors in the given code.
Option F) An exception is thrown at runtime - This option is incorrect because there are no exceptions thrown in the given code.
The correct answer is A) true true. This option is correct because f1
and f3
are pointing to the same object, and the x
variable in both objects is modified to have a value of 6.