1Z0-808: Java SE 8 Programmer IDemo

By Oracle · Question Mode

QuestionQ219

Working with Inheritance

Given these code fragments:

Question Image

What is the outcome?

  • A Compilation fails only at line n1.
  • B Compilation fails only at line n2.
  • C Tool::export Tool::export
  • D Compilation fails at both line n1 and line2.
  • E RTool::export Tool::export
Explanation

A method declared in an interface is implicitly public. Tool.export() correctly implements it as public, but ReportTool.export() attempts to override that method with package-private access. An overriding method cannot reduce the access level of the inherited method, so compilation fails at line n2.

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