Exception Handling and Java I/O Flashcards

Which of the following is a checked exception in Java?

Answer: IOException

`IOException` is a checked exception that must be declared with `throws` or handled with a `try-catch` block.

What is the purpose of the `finally` block in Java exception handling?

Answer: It always executes after try/catch, regardless of outcome

The `finally` block executes unconditionally after the `try` and any matching `catch` blocks, making it ideal for cleanup code.

Which keyword is used to manually throw an exception in Java?

Answer: throw

The `throw` keyword is used to explicitly throw an exception object within a method body.

What happens if an exception is thrown inside a `finally` block?

Answer: It replaces any exception from the try/catch block

An exception thrown inside a `finally` block propagates upward and discards any exception that was in progress from the `try` block.

Which class is the parent of all errors and exceptions in Java?

Answer: Throwable

`Throwable` is the root of the Java exception hierarchy — both `Error` and `Exception` extend it.

In Java I/O, which class is used for reading characters from a file efficiently with buffering?

Answer: BufferedReader

`BufferedReader` wraps a `Reader` (like `FileReader`) to provide buffered character reading and the convenient `readLine()` method.