Given: class Resource implements AutoCloseable { public void close() throws Exception { System.out.print("Close-"); } public void open() { System.out.print("Open-"); } } and this code fragment…

Question

Options

• AOpen-Close-Exception-1
• BOpen-Close-Open-Close-
• CA compilation error occurs at line n1.
• DOpen-Close-Open-

• A
  2% (1)
• B
  12% (5)
• C
  79% (34)
• D
  7% (3)

Explanation

Option C is correct because the try-with-resources syntax requires a resource declaration (including the type), not a bare assignment to an already-declared variable. Writing try (resl = new Resource()) is syntactically illegal - the compiler expects either try (Resource resl = new Resource()) or, in Java 9+, a reference to an effectively final variable like try (resl) where resl is not reassigned. Since the code fails at compile time, nothing runs.

Why the distractors are wrong:

• A assumes the first try block throws an exception, but nothing in open() or the explicit close() call causes one here - and anyway the code never compiles.
• B would be the correct output if line n1 used try (Resource r = new Resource()) - the first try prints Open-Close-, and the try-with-resources auto-close would add another Open-Close-.
• D is wrong because try-with-resources always calls close() automatically, so skipping the close output is impossible even in a hypothetical passing scenario.

Memory tip: Think "declare to autoclose" - the try-with-resources parentheses must contain a full variable declaration (type included), not an assignment expression. If you see a bare variable = value without a type, flag it as a compile error.

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