Django Django Models & ORM 1

Question 1

Which Django ORM method retrieves a single object and raises an exception if not found?

Accepted Answer

get()

Answer

The get() method returns a single object matching the query and raises DoesNotExist if no match or MultipleObjectsReturned if more than one match.

Question 2

What does the `on_delete=models.CASCADE` argument do in a ForeignKey field?

Accepted Answer

Deletes related objects when the referenced object is deleted

Answer

CASCADE causes Django to automatically delete all objects that have a ForeignKey pointing to the deleted object.

Question 3

Which field type would you use to store a many-to-many relationship in a Django model?

Accepted Answer

ManyToManyField

Answer

ManyToManyField creates a junction table in the database to store many-to-many relationships between two models.

Question 4

What is the purpose of Django's `Meta` class inside a model?

Accepted Answer

To define model-level options like ordering and table name

Answer

The inner Meta class allows you to set model-level metadata such as ordering, verbose_name, db_table, and unique_together constraints.

Question 5

Which ORM method returns a QuerySet of all objects matching a condition without raising exceptions?

Accepted Answer

filter()

Answer

filter() returns a QuerySet containing all objects that match the given lookup parameters, returning an empty QuerySet if none are found.

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