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Exception Handling

Question : 17 of 24

Marks: +1, -0

Given:

import java.io.*;
class Master {
  String doFileStuff() throws FileNotFoundException { return "a"; }
}
class Slave extends Master {
  public static void main(String[] args) {
   String s = null;
   try { s = new Slave().doFileStuff();
  } catch ( Exception x) {
   s = "b"; }
   System.out.println(s);
}
  // insert code here
}

Which, inserted independently at // insert code here, will compile, and produce the outputb? (Choose all that apply.)

String doFileStuff() { return "b"; }
String doFileStuff() throws IOException { return "b"; }
String doFileStuff(int x) throws IOException { return "b"; }
String doFileStuff() throws FileNotFoundException { return "b"; }
String doFileStuff() throws NumberFormatException { return "b"; }
String doFileStuff() throws NumberFormatException, FileNotFoundException { return "b"; }

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