Doctrine quiz

Test your Doctrine knowledge with a free interactive quiz — 20 questions with answers and explanations. No signup needed to play.

What is the purpose of Doctrine Migrations (the `doctrine/migrations` package)?

1. What is the purpose of Doctrine Migrations (the `doctrine/migrations` package)?
2. What is "lazy loading" in the context of Doctrine associations, and what problem does it help address?
3. What is the purpose of cascading operations (e.g. `#[ORM\OneToMany(mappedBy: 'author', targetEntity: Post::class, cascade: ['persist', 'remove'])]`) on a Doctrine association?
4. What is a "repository" in Doctrine, and what is its typical role?
5. What is the purpose of Doctrine's "identity map" pattern within a single request/EntityManager session?
6. What is the purpose of the `#[ORM\Id]` and `#[ORM\GeneratedValue]` attributes typically applied to an entity's primary key property?
7. What is Doctrine DBAL (Database Abstraction Layer), and how does it relate to Doctrine ORM?
8. What does the `#[ORM\Column]` attribute's `type` parameter control, e.g. `#[ORM\Column(type: 'string', length: 255)]`?
9. What is the "EntityManager" in Doctrine, and what is its role?
10. What is Doctrine (Doctrine ORM)?
11. What is a Doctrine "entity"?
12. What is the difference between `persist()` and `flush()` on Doctrine's EntityManager?

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