Study 1Z0-829 Java 17 Generics and Collections Framework: key concepts, common traps, and exam decision cues.
This is one of the highest-yield scoring lanes. The exam keeps asking whether a type relationship is legal, whether a collection is mutable or ordered, and whether a comparator or algorithm fits the contract.
| Lesson | Focus |
|---|---|
| 5.1 Collections and Wildcards | Learn how the exam tests wildcard direction, collection behavior, and ordering logic. |
| If the question is really about… | Go first to… |
|---|---|
| wildcard direction or generic legality | 5.1 Collections and Wildcards |
| list, set, map, queue, or mutability behavior | 5.1 Collections and Wildcards |
| ordering, comparators, or algorithms | 5.1 Collections and Wildcards |