Java Exception MCQ - Quiz

In which of the following package Exception class exist?
  • A java.util
  • B java.file
  • C java.io
  • D java.lang

What will be the result after compiling this code? 
class SuperClass{
      public int doIt(String str, Integer... data)throws Exception{
            String signature = "(String, Integer[])";
            System.out.println(str + " " + signature);
            return 1;
      }
}

public class Test extends SuperClass{
      public int doIt(String str, Integer... data){
            String signature = "(String, Integer[])";
            System.out.println("Overridden: " + str + " " +signature);
            return 0;
      }

      public static void main(String... args){
            SuperClass sb = new Test();
            sb.doIt("hello", 3);
      }
}

  • A Overridden: hello (String, Integer[])
  • B hello (String, Integer[])
  • C Compilation fails
  • D None of these

What will be the output of the following piece of code: 
class Person{
    public void talk() {}
}
public class Test{
    public static void main(String args[]){
        Person p = null;
        try{
                p.talk();
        }
        catch(NullPointerException e){
                System.out.print("There is a NullPointerException. ");
        }
        catch(Exception e){
                System.out.print("There is an Exception. ");
        }
        System.out.print("Everything went fine. ");
    }
}

  • A There is a NullPointerException. Everything went fine.
  • B There is a NullPointerException.
  • C There is a NullPointerException. There is an Exception.
  • D This code will not compile, because in Java there are no pointers.

What will be the output? 
class MyClass{
      public String test(){
            try{
                  System.out.print("One");
                  return "";
            }
            finally{
                  System.out.print("Two");
            }
      }
}

public class Test{
      public static void main(String args[]){
            MyClass m =  new MyClass();
            m.test();
      }
}

  • A One
  • B Two
  • C One Two
  • D Compilation Error

Exception generated in try block is caught in ........... block.
  • A catch
  • B throw
  • C throws
  • D finally

Which of the below statement is/are true about Error?

A. An Error is a subclass of Throwable.
B. An Error is a subclass of Exception.
C. Error indicates serious problems that a reasonable application should not try to catch.
D. An Error is a subclass of IOException.
  • A A and D
  • B A and B
  • C A and C
  • D B and C 

try{
      File f = new File("a.txt");
}catch(Exception e){
}catch(IOException io){
}
Is this code create new file name a.txt ?
  • A true
  • B false
  • C Compilation Error
  • D None of these

Which of the following blocks execute compulsorily whether an exception is caught or not.
  • A finally
  • B catch
  • C throws
  • D throw

Given the code. What is the result when this program is executed? 
public class Test{
      static int x[];
    
      static{
            x[0] = 1;
      }
    
      public static void main(String args[]){
      }
}

  • A ArrayIndexOutOfBoundsException is thrown
  • B ExceptionInInitializerError is thrown
  • C IllegalStateException is thrown
  • D StackOverflowException is thrown

Which exception is thrown when divide by zero statement executes?
  • A NumberFormatException
  • B ArithmeticException
  • C NullPointerException
  • D None of these