Data & Persistence — Chapter Quiz

Question 1

1

What does TypeOrmModule.forFeature([User]) do?

ARegisters a global connectionBRegisters entity repositories in the current moduleCGenerates migrationsDOpens a transaction

forFeature registers per-feature repositories that the module's providers can inject.

Question 2

2

Which decorator declares a TypeORM column?

A@Field()B@Column()C@Property()D@Attr()

@Column() from typeorm declares a database column on an entity.

Question 3

3

How do you inject a TypeORM repository in a service?

Anew Repository(User)B@InjectRepository(User) repo: Repository<User>C@Inject(\"USER_REPO\") repo: anyD@Repository(User) repo: any

@InjectRepository(User) resolves the repository registered via forFeature.

Question 4

4

What is the main reason to choose Prisma over TypeORM?

ABetter legacy decorator supportBStrongly typed query builder generated from a schemaCBuilt-in REST endpointsDIt is bundled with Nest by default

Prisma generates a fully typed client from schema.prisma, giving end-to-end type safety on queries.

Question 5

5

Which TypeORM decorator declares a many-to-many relation?

A@OneToManyB@ManyToOneC@ManyToManyD@JoinColumn

@ManyToMany plus @JoinTable (on the owning side) define a many-to-many relation.

Question 6

6

TypeORM transactions can be run with a callback via dataSource.transaction(...).

TTrueFFalse

dataSource.transaction(async (manager) => {...}) runs the callback inside a transaction and rolls back on throw.

Question 7

7

For MongoDB in Nest, the standard library is @nestjs/___.

@nestjs/mongoose provides decorators and module helpers for Mongoose schemas.

Question 8

8

Common ways to paginate a database query include

Select all that apply.

AOFFSET / LIMITBCursor (keyset) paginationCRecursive CTE paginationDNo pagination — return all rows

Offset/limit is the simplest approach; cursor pagination is more stable and scales better. Returning everything is rarely correct.

Test what you learned.