Java Chapter 11: Exceptions and Advanced File I/O Questions and Answers Already Passed

Java Chapter 11: Exceptions and Advanced File I/O Questions and Answers Already Passed What is an exception in Java? An exception is an event that disrupts the normal flow of a program during execution. How do you handle exceptions in Java? Exceptions in Java are handled using try-catch blocks. What keyword is used to manually throw an exception in Java? The `throw` keyword is used to manually throw an exception. What is the difference between checked and unchecked exceptions? Checked exceptions must be handled using a try-catch block or declared using `throws`, while unchecked exceptions do not require explicit handling. What is the purpose of the `finally` block in exception handling? The `finally` block is used to execute code regardless of whether an exception occurs or not. 2 What happens if an exception is not caught in Java? If an exception is not caught, the program terminates and an error message is displayed. What is the superclass of all exception classes in Java? The `Throwable` class is the superclass of all exception classes. How do you declare that a method may throw an exception? A method declares exceptions using the `throws` keyword in its signature. What is a `try-with-resources` statement? It is a special try block that automatically closes resources like files or streams when execution exits the block. What kind of exceptions does a `try-with-resources` statement handle? It is primarily used for handling checked exceptions related to file and resource management. 3 What happens if an exception occurs inside a `finally` block? If an exception occurs inside a `finally` block, it may override any previous exception and lead to unexpected behavior. What method is used to retrieve an exception’s error message? The `getMessage()` method retrieves the error message of an exception. What is the purpose of the `printStackTrace()` method? It prints a detailed stack trace of the exception, helping in debugging. How can multiple exceptions be handled in a single catch block? Multiple exceptions can be caught using a single catch block by separating exception types with the `|` operator. What is a custom exception in Java? A custom exception is a user-defined exception that extends the `Exception` or `RuntimeException` class. 4 How do you create a custom exception in Java?