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Django

Q1. To cache your entire site for an application in Django, you add all except which of these settings?

  • django.middleware.common.CommonMiddleware
  • django.middleware.cache.UpdateCacheMiddleware
  • django.middleware.cache.FetchFromCacheMiddleware
  • django.middleware.cache.AcceleratedCacheMiddleware

Q2. In which programming language is Django written?

  • C++
  • Java
  • Python
  • Ruby

Q3. To automatically provide a value for a field, or to do validation that requires access to more than a single field, you should override the ___ method in the ___ class.

  • validate(); Model
  • group(); Model
  • validate(); Form
  • clean(); Field

Q4. A client wants their site to be able to load "Rick & Morty" episodes by number or by title—e.g., shows/3/3 or shows/picklerick. Which URL pattern do you recommend?

  • url(r'shows/int:season/int:episode/', views.episode_number)
  • path('shows/int:season/int:episode/', views.episode_number),
  • path('shows/int:season/int:episode', views.episode_number),
  • url(r'^show/(?P[0-9]+)/(?P[0-9]+)/$', views.episode_number),

Q5. How do you determine at startup time if a piece of middleware should be used?

  • Raise MiddlewareNotUsed in the init function of your middleware.
  • Implement the not_used method in your middleware class.
  • List the middleware beneath an entry of django.middleware.IgnoredMiddleware.
  • Write code to remove the middleware from the settings in [app]/init.py.

Q6. How do you turn off Django’s automatic HTML escaping for part of a web page?

  • Place that section between paragraph tags containing the autoescape=off switch.
  • Wrap that section between { percentage mark autoescape off percentage mark} and {percentage mark endautoescape percentage mark} tags.
  • Wrap that section between {percentage mark autoescapeoff percentage mark} and {percentage mark endautoescapeoff percentage mark} tags.
  • You don't need to do anything—autoescaping is off by default.

Q7. Which step would NOT help you troubleshoot the error "django-admin: command not found"?

  • Check that the bin folder inside your Django directory is on your system path.
  • Make sure you have activated the virtual environment you have set up containing Django.
  • Check that you have installed Django.
  • Make sure that you have created a Django project.

Q8. Every time a user is saved, their quiz_score needs to be recalculated. Where might be an ideal place to add this logic?

  • template
  • model
  • database
  • view

Q9. What is the correct way to begin a class called "Rainbow" in Python?

  • Rainbow {}
  • export Rainbow:
  • class Rainbow:
  • def Rainbow:

Q10. You have inherited a Django project and need to get it running locally. It comes with a requirements.txt file containing all its dependencies. Which command should you use?

  • django-admin startproject requirements.txt
  • python install -r requirements.txt
  • pip install -r requirements.txt
  • pip install Django

Q11. Which best practice is NOT relevant to migrations?

  • To make sure that your migrations are up to date, you should run updatemigrations before running your tests.
  • You should back up your production database before running a migration.
  • Your migration code should be under source control.
  • If a project has a lot of data, you should test against a staging copy before running the migration on production.

Q12. What will this URL pattern match? url(r'^$', views.hello)

  • a string beginning with the letter Ra string beginning with the letter R
  • an empty string at the server root
  • a string containing ^ and $a string containing ^ and $
  • an empty string anywhere in the URLan empty string anywhere in the URL

Q13. What is the typical order of an HTTP request/response cycle in Django?

  • URL > view > template
  • form > model > view
  • template > view > model
  • URL > template > view > model

Q14. Django's class-based generic views provide which classes that implement common web development tasks?

  • concrete
  • thread-safe
  • abstract
  • dynamic

Q15. Which skills do you need to maintain a set of Django templates?

  • template syntax
  • HTML and template syntax
  • Python, HTML, and template syntax
  • Python and template syntax

Q17. How would you define the relationship between a star and a constellation in a Django model?

  • [x]
class Star(models.Model):
name = models.CharField(max_length=100)
class Constellation(models.Model):
stars = models.ManyToManyField(Star)
  • [ ]
class Star(models.Model):
constellation = models.ForeignKey(Constellation, on_delete=models.CASCADE)
class Constellation(models.Model):
stars = models.ForeignKey(Star, on_delete=models.CASCADE)
  • [ ]
class Star(models.Model):
name = models.CharField(max_length=100)
class Constellation(models.Model):
stars = models.OneToManyField(Star)
  • [ ]
class Star(models.Model):
constellation = models.ManyToManyField(Constellation)
class Constellation(models.Model):
name = models.CharField(max_length=100)

Q18. Which is NOT a valid step in configuring your Django 2.x instance to serve up static files such as images or CSS?

  • In your urls file, add a pattern that includes the name of your static directory.
  • Create a directory named static inside your app directory.
  • Create a directory named after the app under the static directory, and place static files inside.
  • Use the template tag {percentage mark load static percentage mark}.

Q19. What is the correct way to make a variable available to all of your templates?

  • Set a session variable.
  • Use a global variable.
  • Add a dictionary to the template context.
  • Use RequestContext.

Q20. Should you create a custom user model for new projects?

  • No. Using a custom user model could break the admin interface and some third-party apps.
  • Yes. It is easier to make changes once it goes into production.
  • No. Django's built-in models.User class has been tried and tested—no point in reinventing the wheel.
  • Yes, as there is no other option.

Q21. You want to create a page that allows editing of two classes connected by a foreign key (e.g., a question and answer that reside in separate tables). What Django feature can you use?

  • actions
  • admin
  • mezcal
  • inlines

Q22. Why are QuerySets considered "lazy"?

  • The results of a QuerySet are not ordered.
  • QuerySets do not create any database activity until they are evaluated.
  • QuerySets do not load objects into memory until they are needed.
  • Using QuerySets, you cannot execute more complex queries.

Q23. You receive a MultiValueDictKeyError when trying to access a request parameter with the following code: request.GET['search_term']. Which solution will NOT help you in this scenario?

  • Switch to using POST instead of GET as the request method.
  • Make sure the input field in your form is also named "search_term".
  • Use MultiValueDict's GET method instead of hitting the dictionary directly like this: request.GET.get('search_term', '').
  • Check if the search_term parameter is present in the request before attempting to access it.

Q24. Which function of Django's Form class will render a form's fields as a series of

tags?

  • show_fields()
  • as_p()
  • as_table()
  • fields()

Q25. You have found a bug in Django and you want to submit a patch. Which is the correct procedure?

  • Fork the Django repository GitHub.
  • Submit a pull request.
  • all of these answers.
  • Run Django's test suite.

Q26. Django supplies sensible default values for settings. In which Python module can you find these settings?

  • django.utils.default_settings.py
  • django.utils.global_settings.py
  • django.conf.default_settings.py
  • django.conf.global_settings.py

Q27. Which variable name is best according to PEP 8 guidelines?

  • numFingers
  • number-of-Fingers
  • number_of_fingers
  • finger_num

Q28. A project has accumulated 500 migrations. Which course of action would you pursue?

  • Manually merge your migration files to reduce the number
  • Don't worry about the number
  • Try to minimize the number of migrations
  • Use squashmigrations to reduce the number

Q29. What does an F() object allow you when dealing with models?

  • perform db operations without fetching a model object
  • define db transaction isolation levels
  • use aggregate functions more easily
  • build reusable QuerySets

Q30. Which is not a django filed type for integers?

  • SmallIntegerField
  • NegativeIntegerField
  • BigAutoField
  • PositiveIntegerField

Q31. Which will show the currently installed version?

  • print (django.version)
  • import django django.getVersion()
  • import django django.get_version()
  • python -c django --version

Q32. You should use the http method ___ to read data and ___ to update or create data

  • READ; WRITE
  • GET; POST
  • POST; GET
  • GET; PATCH

Q33. When should you employ the POST method over GET for submitting data?

  • when efficiency is important
  • when you want the data to be cached
  • when you want to use your browser to help with debugging
  • when the data in the form may be sensitive

Q34. When to use the Django sites framework?

  • if your single installation powers more than one site
  • if you need to serve static as well as dynamic content
  • if you want your app have a fully qualified domain name
  • if you are expecting more than 10.000 users

Q35. Which infrastructure do you need:

title=models.charfield(max_length=100, validators=[validate_spelling])

  • inizialized array called validators
  • a validators file containing a function called validate_spelling imported at the top of model
  • a validators file containing a function called validate imported at the top of model
  • spelling package imported at the top of model

Q36. What decorator is used to require that a view accepts only the get and head methods?

  • require_safe()
  • require_put()
  • require_post()
  • require_get()

Q37. How would you define the relation between a book and an author - book has only one author.

  • [ ]
class Author (models.model):
book=models.foreignkey(Book,on_delete=models.cascade)
class Book(models.model):
name=models.charfield(max_length=100)
  • [x]
class Author (models.model):
name=models.charfield(max_length=100)
class Book(models.model):
author=models.foreignkey(Author,on_delete=models.cascade)
  • [ ]
class Author (models.model):
name=models.charfield(max_length=100)
class Book(models.model):
author=models.foreignkey(Author)
  • [ ]
class Author (models.model):
name=models.charfield(max_length=100)
class Book(models.model):
author=models.foreignkey(Author,on_delete=models.cascade)
  • [ ]
class Author (models.model):
name=models.charfield(max_length=100)
class Book(models.model):
author=Author.name

Q38. What is a callable that takes a value and raises an error if the value fails?

  • validator
  • deodorizer
  • mediator
  • regular expression

Q39. To secure an API endpoint, making it accessible to registered users only, you can replace the rest_framework.permissions.allowAny value in the default_permissions section of your settings.py to

  • rest_framework.permissions.IsAdminUser
  • rest_framework.permissions.IsAuthenticated
  • rest_framework.permissions.IsAuthorized
  • rest_framework.permissions.IsRegistered

Q40. Which command would you use to apply a migration?

  • makemigration
  • update_db
  • applymigration
  • migrate

Q41. Which type of class allows QuerySets and model instances to be converted to native Python data types for use in APIs?

  • objectwriters
  • serializers
  • picklers
  • viewsets

Q42. How should the code end?

{ percentage if spark >= 50 percentage }
Lots of spark
{percentage elif spark == 42 percentage}
  • { percentage else percentage}
  • {percentage endif percentage}
  • Nothing needed
  • {percentage end percentage}

Q43 Which code block will create a serializer?

from rest_framework import serializers
from .models import Planet
  • [x]
class PlanetSerializer(serializers.ModelSerializer):
class Meta:
model=Planet
fields=('name','position', 'mass', 'rings')
  • [ ]
from rest_framework import serializers
from .models import Planet
class PlanetSerializer():
class Meta:
fields=('name','position', 'mass', 'rings')
model=Planet
  • [ ]
from django.db import serializers
from .models import Planet
class PlanetSerializer(serializers.ModelSerializer):
fields=('name','position', 'mass', 'rings')
model=Sandwich
  • [ ]
from django.db import serializers
from .models import Planet
class PlanetSerializer(serializers.ModelSerializer):
class Meta:
fields=('name')
model=Planet

Q44 Which class allows you to automatically create a Serializer class with fields and validators that correspond to your model's fields?

  • ModelSerializer
  • Model
  • DataSerializer
  • ModelToSerializer

Q45 Which command to access the built-in admin tool for the first time?

  • django-admin setup
  • django-admin runserver
  • python manage.py createuser
  • python manage.py createsuperuser

Q46. Virtual environments are for managing dependencies. Which granularity works best?

  • you should set up a new virtualenv for each Django project
  • They should not be used
  • Use the same venv for all your Django work
  • Use a new venv for each Django app

Q47. What executes various Django commands such as running a webserver or creating an app?

  • migrate.py
  • wsgi.py
  • manage.py
  • runserver

Q48. What do Django best practice suggest should be "fat"?

  • models
  • controllers
  • programmers
  • clients

Q49. Which is not part of Django's design philosophy?

  • Loose Coupling
  • Less Code
  • Fast Development
  • Implicit over explicit

Q50. What is the result of this template code?

{{"live long and prosper"|truncate:3}}
  • live long and ...
  • live long and
  • a compilation error
  • liv

Q51. When does this code load data into memory?

1 sandwiches = Sandwich.objects.filter(is_vegan=True)
2 for sandwich in sandwiches:
3   print(sandwich.name + " - " + sandwich.spice_level)
  • line 1
  • It depends on how many results return by query.
  • It depends on cache.
  • line 2

Q52. You are building a web application using a React front end and a Django back end. For what will you need to provision?**

  • an NGINX web server
  • a NoSQL database
  • a larger hard drive
  • CORS middleware

Q53. To expose an existing model via an API endpoint, what do you need to implement?**

  • an HTTP request
  • a JSON object
  • a query
  • a serializer

Q54. How would you stop Django from performing database table creation or deletion operations via migrations for a particular model?**

  • Run the migrate command with --exclude=[model_name].
  • Move the model definition from models.py into its own file.
  • Set managed=False inside the model.
  • Don't run the migrate command.

Q55. what method can you use to check if form data has changed when using a form instance?

  • has_changed()
  • its_changed()
  • has_updated()
  • None of This

Q56. What is WSGI?

  • a server
  • an interface specification
  • a Python module
  • a framework

Q57. Which generic view should be used for displaying the tittles of all Django Reinhardt's songs?

  • DetailView
  • TittleView
  • SongView
  • ListView

Q58. Which statement is most acurate, regarding using the default SQLite database on your local/development machine but Postgres in production

  • There's less chance of introducing bugs since SQLite already works out the box
  • It's fine, you just need to keep both instances synchronized
  • It's a bad idea and could lead to issues down the road
  • It's the most efficient way to build a project

Q59. Why might you want to write a custom model Manager?

  • to perform database queries
  • to set up a database for testing
  • to modify the initial QuerySet that the Manager returns
  • to filter the results that a database query returns