Java Programming - MCQ Practice Questions

What happens if you use 'return' statement inside a finally block?

What will be printed? public class Test { public static void main(String[] args) { try { System.out.println("In try"); return; } catch (Exception e) { System.out.println("In catch"); } finally { System.out.println("In finally"); } } }

What is the output of exception chaining in Java?

Which method is used to get the exception that caused the current exception in Java?

Which exception is thrown when a thread tries to acquire a monitor that is already locked?

Consider the following code. What will be printed? public class FinallyTest { public static int getValue() { try { return 10; } finally { System.out.println("Finally"); } } public static void main(String[] args) { System.out.println(getValue()); } }

Which of the following statements is true regarding exception constructors?

What is the output of multi-level exception chaining? public class ChainTest { public static void main(String[] args) { try { try { throw new IOException("IO Error"); } catch (IOException e) { throw new RuntimeException("Runtime Error", e); } } catch (RuntimeException e) { System.out.println(e.getCause().getClass().getSimpleName()); } } }

Which of the following best describes a custom exception in Java?

What will be the result of executing this code? public class MultiCatchTest { public static void main(String[] args) { try { int[] arr = {1, 2}; int x = arr[5]; } catch (ArrayIndexOutOfBoundsException | NullPointerException e) { System.out.println("Array or Null Error"); } } }

Consider code that implements auto-closeable resources. What is the advantage of try-with-resources statement?

What is the correct way to create a custom exception with cause chaining?

Which interface must a class implement to work with try-with-resources?

In multi-catch block (Java 7+), which operator is used to catch multiple exceptions in a single catch clause?

What will be the output? try { throw new Exception("Test"); } catch(Exception e) { System.out.println("Caught"); throw new RuntimeException("New"); } finally { System.out.println("Finally"); }

Consider the following exception hierarchy. Which statement will compile without error? class MyException extends Exception {} class MyRuntimeException extends RuntimeException {}

Which of the following will NOT result in a NullPointerException?

In Java, which method of Throwable class is used to obtain the cause of an exception?

What will be printed when this code executes? String str = "Java"; try { int x = Integer.parseInt(str); } catch(NumberFormatException e) { System.out.println("Invalid number"); } catch(Exception e) { System.out.println("General exception"); }

Which of the following is true about try-with-resources (Java 7+)?