LinkedIn Assessment Test Answers - Django [Updated to Latest]

 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<season>[0-9]+)/(?P<episode>[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?

👍-	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
• for caching data
• help your browser with debugging 👍 - data 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)

👍 - 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} The answer

• { 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

•  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