Exception Handling and CollectionQuiz

Which class acts as a root for all java classes?

• String

• Object

• Throwable

• None of the above

Which of the following is not a kind of exception that is thrown by the JDBC method?

• DataRounding

• SQL Exception

• DataTruncation

• SQL Warning

Predict the output of following Java program

class Main {

   public static void main(String args[]) {

      try {

         throw 10;

      }

      catch(int e) {

         System.out.println("Got the  Exception " + e);

      }

  }

}

• Got the Exception 10

• Got the Exception 0

• Compiler Error

• None

Output of following Java program?

class Main {

   public static void main(String args[]) {

      int x = 0;

      int y = 10;

      int z = y/x;

  }

}

• Compiler Error

• Compiles fine but throws ArrayIndexOutOfBoundsException

• Compiles and runs fine

• Compiles fine but throws ArithmeticException exception

The closest common ancestor of RuntimeException, Error, IOException and ClassNotFoundException is:

• Object

• Exception

• Throwable

• Catchable

Which of the following statements is true about Java's finally block?

• The finally block is only executed if an exception is thrown in the try block

• The finally block is only executed if an exception is thrown in the catch block

• The finally block is only executed if an exception is not thrown in the try or catch block

• The finally block is executed regardless of whether an exception is thrown in the try or catch block

Which interface provides key-value pair?

• List

• Set

• Map

• Collection

import java.util.*;

class UtilitiesTest {

public static void main(String[] args) {

List < int > intList = new ArrayList < > ();

intList.add(10);

intList.add(20);

System.out.println("The list is: " + intList);

• It prints the following: The list is: [10, 20] 

• It prints the following: The list is: [20, 10] 

• It results in a compiler error 

• It results in a runtime exception

Which of the following statements is true about exception handling in Java:

• A try block can have many catch blocks and many finally blocks

• A try block must have one finally block for each catch block

• A try block can have many catch blocks but only one finally block

• A try block must have at least one catch block to have a finally block

What are the implementation classes of the Map interface?

• HashMap

• LinkedHashMap

• TreeMap

• All of above