Difficulty: Easy
Correct Answer: The program will print the output 10 11.
Explanation:
Introduction / Context:
This tests post-increment behavior when two reference parameters alias the same object. The order of assignments matters: store x = xx++ first, then copy y = yy after the increment.
Given Data / Assumptions:
Concept / Approach:
Post-increment returns the old value, then increments the underlying object. Because yy aliases the same object, reading yy after the increment observes the new value.
Step-by-Step Solution:
Verification / Alternative check:
Swapping the two assignment lines would change the observed pair because the timing of the increment differs.
Why Other Options Are Wrong:
They misread pre/post semantics or ignore that both references alias the same object.
Common Pitfalls:
Expecting both fields to be 11 due to misunderstanding of when the incremented value is used.
Final Answer:
The program will print the output 10 11.
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