Chapter 6: Exceptions

Question 1

What is true of all checked exceptions?

Answer 1

They are not subclasses of RuntimeException

Question 2

T or F. Error is a subclass of Exception

Answer 2

False. It is a subclass of Throwable with Exception as a sibling

Question 3

What is a checked exception?

Answer 3

An exception that must be handled or declared in order for the code to compile

Question 4

T or F. A try block doesn’t require a catch block

Answer 4

True. A try block requires at least on catch or finally block

Question 5

T or F. A try block can have multiple finally blocks

Answer 5

False

Question 6

What happens when multiple exceptions are thrown?

Answer 6

Only the last one matters and is passed on

Question 7

What kind of exception is ArithmeticException?

Answer 7

Runtime

Question 8

What kind of exception is ArrayIndexOutOfBoundsException?

Answer 8

Runtime

Question 9

What kind of exception is ClassCastException?

Answer 9

Runtime

Question 10

What kind of exception is IllegalArgumentException?

Answer 10

Runtime

Question 11

What kind of exception is NullPointerException?

Answer 11

Runtime

Question 12

What kind of exception is NumberFormatException?

Answer 12

Runtime

Question 13

What kind of exception is FileNotFoundException?

Answer 13

Checked

Question 14

What kind of exception is IOException?

Answer 14

Checked

Question 15

When must the caller handle an exception?

Answer 15

When a method declares that it throws a checked exception

Question 16

T or F. When overriding a method that throws an exception, the child method doesn’t need to throw an exception

Answer 16

True

Question 17

T or F. A method can declare an exception even if nothing in it’s body can generate that exception

Answer 17

True

Question 18

T or F. If a RuntimeException is declared, it must be handled?

Answer 18

False. They are exempt from the checked exception rules