A:
Exercise 10.1 in the book. The topic is build your own exception class.
B:
Exercise 10.4 in the book. The topic is the NullPointerException, a specialization of RuntimeException.
C:
Exercise 10.6 in the book. Covers the topic, matching exceptions.
D:
Exercise 10.10 in the book. The topic is exceptions in constructors.
Best regards,
Kristian Torp