Question 1

Every program with a try block must end with a finally block.

Accepted Answer

A try block does not require a finally block; it can be followed by either a catch block, a finally block, or both.

Question 2

The order in which catch blocks are placed in a program has no impact on which catch block is executed.

Accepted Answer

The order of catch blocks matters because exceptions are caught in the order they are defined. If a more general exception is placed before a specific one, it will catch the exception, preventing the specific catch block from executing.

Question 3

The class Throwable is derived from the class Exception.

Accepted Answer

The class Throwable is the superclass of all errors and exceptions in Java, and Exception is a subclass of Throwable.

Question 4

When an exception occurs, an object of a particular exception class is created.

Accepted Answer

When an exception occurs, Python creates an object of the exception class that represents the error, which can then be handled using try-except blocks.

Question 5

The class Object is derived from the class Throwable.

Accepted Answer

The class Object is the root class of the Java class hierarchy and is not derived from any other class, including Throwable.

Question 6

The class Exception and its subclasses are designed to catch exceptions that should be caught and processed during program execution.

Accepted Answer

The Exception class and its subclasses in Java are used to handle exceptions that can occur during program execution, allowing developers to catch and process these exceptions to prevent program crashes and handle errors gracefully.

Question 7

Statements that might generate an exception are placed in a catch block.

Accepted Answer

Statements that might generate an exception are placed in a try block, not a catch block. The catch block is used to handle the exception if it occurs.

Question 8

The methods getMessage and printStackTrace are private methods of the class Throwable.

Accepted Answer

The methods getMessage and printStackTrace are public methods of the class Throwable, not private.

Question 9

If you have a reference to an exception object, you can use the reference to throw the exception.

Accepted Answer

If you have a reference to an exception object, you can use the throw statement to throw the exception.

Question 10

During program execution, if division by zero occurs with integer values and is not addressed by the program, then the program terminates with an error message indicating an attempt to divide by zero.

Accepted Answer

In most programming languages, dividing an integer by zero is undefined and results in a runtime error, causing the program to terminate with an error message.

Question 11

An unchecked exception is any exception that causes a program to terminate.

Accepted Answer

Unchecked exceptions are runtime exceptions that are not required to be caught or declared, but they do not necessarily cause a program to terminate unless they are not handled properly.

Question 12

Making a reference to an object that has not yet been instantiated would throw an exception from the NullPointerException class.

Accepted Answer

In Java, attempting to access or modify an object that has not been instantiated (i.e., is null) will result in a NullPointerException being thrown.

Question 13

The class Exception contains two constructors.

Accepted Answer

The class Exception in Java has two constructors: one with no arguments and one that accepts a String message.

Question 14

The try block contains statements that should be executed regardless of whether or not an exception occurs.

Accepted Answer

The try block contains statements that may potentially cause an exception, and the execution of these statements is contingent upon whether an exception occurs or not. The finally block is used for statements that should be executed regardless of an exception.

Question 15

The StringIndexOutOfBoundsException could be thrown by the method parseInt of the class Integer.

Accepted Answer

The method parseInt of the class Integer throws a NumberFormatException, not a StringIndexOutOfBoundsException.

Question 16

If there is a finally block after the last catch block, the finally block always executes.

Accepted Answer

The finally block is designed to execute regardless of whether an exception is thrown or caught, ensuring that cleanup code runs.

Question 17

If an exception occurs in a try block and that exception is caught by a catch block, then the remaining catch blocks associated with that try block are ignored.

Accepted Answer

If an exception is caught by a catch block, the control is transferred to that block, and any subsequent catch blocks are ignored unless the exception is re-thrown.

Question 18

A checked exception is any exception checked for by the programmer.

Accepted Answer

A checked exception is one that is checked at compile-time by the Java compiler, not by the programmer.

Question 19

The class RuntimeException is part of the package java.io.

Accepted Answer

The class RuntimeException is part of the package java.lang, not java.io.

Question 20

NoSuchElementException is a method of the class Exception.

Accepted Answer

NoSuchElementException is a class, not a method, and it extends the RuntimeException class, not the Exception class.

Quiz 11: Handling Exceptions and Events