试题详情
单项选择题 interface Beta {}  class Alpha implements Beta {  String testIt() {  return “Tested”;  }  }  public class Main1 {  static Beta getIt() {  return new Alpha();  }  public static void main( String[] args ) {  Beta b = getIt();  System.out.println( b.testIt() );  }  }  What is the result?()  

A、 Tested

B、 Compilation fails.

C、 The code runs with no output.

D、 An exception is thrown at runtime.

  • B
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