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What happens if two classes with the same fully qualified name are included in a Java project?

hard📝 Conceptual Q10 of 15
Java - Packages and Access Control
What happens if two classes with the same fully qualified name are included in a Java project?
AThe last package loaded overrides the other silently
BCompilation fails due to duplicate fully qualified class names
CBoth classes are merged into one
DRuntime exception is thrown when class is used
Step-by-Step Solution
Solution:

  1. Step 1: Understand fully qualified names

    Fully qualified names include package and class name, which must be unique in a project.

  2. Step 2: Effect of duplicates

    Having two classes with the same fully qualified name causes compilation failure due to ambiguity.

  3. Final Answer:

    Compilation fails due to duplicate fully qualified class names -> Option B

  4. Quick Check:

    Duplicate fully qualified names cause compile errors [OK]
Quick Trick: Fully qualified names must be unique in a project [OK]
Common Mistakes:
  • Assuming silent overrides happen
  • Thinking classes merge automatically
  • Expecting runtime exceptions instead of compile errors

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