alleryMatch boxing nuance: 1. Up: p. Supported 2. Down: q. Disallowed 3. Equal: r. Ref check
A1-p, 2-q, 3-r
B1-p, 2-r, 3-q
C1-q, 2-p, 3-r
D1-r, 2-p, 3-q
Answer & Solution
Correct answer: A. 1-p, 2-q, 3-r
Autoboxing permits widening conversions, forbids automatic downcasting across types, and == compares references.
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