Chapter 6: Exceptions

1. B. Runtime exceptions are also known as unchecked exceptions. They are allowed to be declared, but they don't have to be. Checked exceptions must be handled or declared. Legally, you can handle java.lang.Error subclasses, but it's not a good idea.
2. B, D. In a method declaration, the keyword throws is used. To actually throw an exception, the keyword throw is used and a new exception is created.
3. C. A try statement is required to have a catch clause and/or finally clause. If it goes the catch route, it is allowed to have multiple catch clauses.
4. B. The second line tries to cast an Integer to a String. Since String does not extend Integer, this is not allowed and a ClassCastException is thrown.
5. A, B, D. java.io.IOException is thrown by many methods in the java.io package, but it is always thrown programmatically. The same is true for NumberFormatException; it is thrown programmatically by the wrapper classes of java.lang. The other three exceptions are all...