Health OS - REPLIQ Junior Django Developers Quiz 2023

Mushfiqur Rahman

11 Mar, 2023

Is the Django ORM slow?

Ans: Yes, it's at least slower than raw sql queries

When should You use Model.objects.select_related(...)?

Ans:

What is a template in Django?

Templates are usually text files that are placeholders for static and dynamic content

Templates are files that contain HTML

Templates are files that contain XML

All of the above

None of the above

How would You extend/customize Django's User model with custom fields?

I would define a One-To-One field named "profile" and connect it to a model named Profile and then define my fields there

I would use the AbstractBaseUser class and then extend it with a CustomUser model

I would write my own class from scratch in order to customize logic

I would write a signal that connect the built in User model to a second model that will hold my custom fields

All of the above makes sense

None of the above makes sense

What does MVT stand for?

Model View Tag

Model Validation Tool

Model View Template

Model Verification Tag

You want to store a floating point number in a model. What built-in model field would You use to store it?

DecimalField

IntegerField

CharField

FloatField

All of the above

None of the above

What type of logic should You store in a model?

Database validation logic

Logic related to an instance/row in the database

Store column information and meta data

Primary keys and their relationships

Store index related configuration

All of the above

None of the above

Does Django handle migrations for You?

Yes

Only if You write some specific logic

What is a Django management script?

It is a way to run code outside of the request/response loop

It is a script that generates static HTML in a Django project

It is some arbitrary code that runs every hour to do some cleanup

All of the above

None of the above

When should one use serializers.SerializerMethodField(...)?

When I want to represent some data in a model in a different way than the way it is stored in the model

When I want to calculate a certain value not related to the model

When I want to ignore model data but return something useful

All of the above

None of the above

What is REST?

A protocol for storing data in the backend

A client that handles communication between the server and the database

A method to communicate between client and server

An HTTP layer that handles communication between two parties

All of the above

None of the above

What is the purpose of Abstract classes?

An abstract class is a class that uses the same table but You can specify customized behavior

An abstract class is a blueprint that other classes can use in order to inherit certain attrbutes and methods

An abstract class is a class which defines an interface so that other classes can expect a defined set of behaviours from it

When should You use Model.objects.select_related(...)?

When I want to fetch known field data from related tables and not fetch the data lazily

When I want to load many rows at once and cache the queryset

When I want to load relational meta data before I traverse the data in Python

What is the purpose of Proxy models in Django?

Proxy models share the same table but You can customize its logic and behavior in Python

Proxy models work as interfaces that every instance inherits to share the same logic

You set proxy = True in the class Meta to use a Django proxy model

All of the above

None of the above

How would You write a Django REST Framework view that only allows for changing a single field in a model thru a REST call?

Create a serializer with one defined field and map it to a UpdateView view where url can be something like '/api/v1/fruits/<slug>/fieldname'

Use a ModelSerializer and expose one field and then make it accessible so that the developer can make a PATCH request

Define a raw function that takes the form data and manually validate it and then sets a specific field

I would use a ListView with a custom serializer that checks the request data and removes all other data except the data related to one field

I would define a Django ModelForm instance with one single exposed field

Is the Django ORM slow?

Yes

Yes, it's at least slower than raw sql queries

It depends

All of the above

None of the above

Not if You know what it does

What does a normal serializer do Django REST Framework?

It stores session data

It stores instance data

It has logic for converting between JSON data and Python objects

It handles conversion logic between XML and HTML

What is the purpose of MVC frameworks?

Clear separation of logic

Health OS - REPLIQ Junior Django Developers Quiz 2023

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