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Upwork Django Test Answers 2022

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20 Answered Test Questions:

1. Consider the following Python string representing a human readable date and time:
      dt="Jan 14 2009 11:00PM" 

Which of the following code snippets will convert the above string to a Python Datetime object that is suitable for a django.models.DateField?

Answers:

� date_object = time.strptime(dt, ‘%b %d %Y %I:%M%p’)

� date_object = datetime.strptime(dt, ‘%b %d %Y %I:%M%p’)

� date_object = datetime.strptime(dt, ‘%B %D %Y %I:%M%p’)

� date_object = time.strptime(dt, ‘%b %d %Y %I:%M%p’)

2. Which of the following is false about the django.models.SlugField() model field?

Answers:

� It is used when performing a query, or as a part of a URL, since by default it ensures uniqueness.

� To create a slug based on another field automatically in the admin, prepopulated_fields has to be used.

� It can only contain letters, numbers, underscores or hyphens.

� Slugs can created in Django templates using the builtin filter, “django.template.defaultfilters.slugify”, formatted as some_text.

3. What does the django.core.context_processors.static() method do?

Answers:

� It takes a path and urljoins it with the static prefix STATIC_URL.

� It adds STATIC_URL to every template context rendered with RequestContext contexts.

� It populates a template variable with the static prefix STATIC_URL to be used as a variable or directly.

� None of these.

4. Which of the following statements is true about the django.template.RequestContext class?

Answers:

� It takes a Context object as its first argument.

� It takes an HttpRequest as its first argument.

� It does not automatically the context with variables.

� It can only be given one context processor.

5. Consider two Django QuerySets query_set_1 and query_set_2 from two different models. 
Which of the following code snippets is the most performant when concatenating the two QuerySets into one list?

Answers:

� from itertools import chain result_list = list(chain(query_set_1,query_set_2))

� result_list = query_set_1 | query_set_2

� from django.db.models import Q result_list = Q(query_set_1) | Q(query_set_1)

� from itertools import chain result_list = chain(query_set_1, query_set_2)

6. Which of the following statements about database transactions in Django is false?

Answers:

� “atomic” blocks allows the creation of blocks of code within which the atomicity on the database is guaranteed.

� “atomic” blocks cannot be nested.

� “atomic” can be used as a decorator.

� “atomic” can be used as a context manager.

7. Consider the following code snippet for a Django Model:

class Salary(models.Model):    
    amount = models.PositiveIntergerField(help_text="eg 8000")
    retired = models.BooleanField(help_text="True if above average")
    �........

Which of the following will correctly produce a QuerySet of all Salary objects where retired == True and amount != 7300?

Answers:

� results = Salary.objects.exclude(retired=true, amount__lt=7300).exclude(retired=true,amount__gt=7300)

� from django.db.models import Q results = Salary.filter(~Q(amount=7300),retired=True)

� results = Salary.objects.filtered(retired=True, amount__ne=7300)

� from django.db.models import Q results = Salary.filter(Q(amount=7300),retired=True)

8. Which of the following gets called when a view raises an exception?

Answers:

� view_exception()

� process_exception()

� execution_exception()

� controller_exception()

9. What is the best way to extend the Django user model with extra custom fields in addition to the fields already provided?

Answers:

� Use a a proxy model based on django.contrib.auth.models.User.

� Subclass django.contrib.auth.models.AbstractUser and add the extra fields.

� Subclass django.contrib.auth.models.AbstractBaseUser and add the extra fields.

� Use a one-to-one relationship to a model containing the extra fields.

10. Which of the following statements are true about the ImageField class?

Answers:

� It inherits all attributes and methods from the FileField class.

� It validates that the uploaded object is a valid image.

� Its instances are created as varchar(200) columns in the database.

� It’s default form widget is a ClearableFileInput.

11. What does the "with" template tag do?

Answers:

� It adds its argument to the value.

� It caches a complex under a simpler name.

� It filters the contents of the blog through one or more filters.

� None of these.

12. Which of the following statement is false about the django.http.HttpRequest.get_host() method ?

Answers:

� If DEBUG = False and ALLOWED_HOSTS= [] the method will raise SuspiciousOperation exception resulting in an HTTP Error 500 Internal server error.

� The method will fail when the host is behind multiple proxies, in this case one solution is to use middleware which will rewrite the proxy headers.

� This method is invoked if some code accesses the Host header from request.META, thus providing a security measure to prevent an attacker from poisoning caches and password reset emails with links to malicious hosts by submitting requests with a fake HTTP Host header.

� The method uses information from the HTTP_X_FORWARDED_HOST and HTTP_HOST headers, in that order, or a combination of SERVER_NAME and SERVER_PORT if the latter does not provide a value.

13. What is the default max_length value of a SlugField class in Django?

Answers:

� 50

� 100

� 25

� 150

14. Which of the following is a built-in BaseCommand subclass?

Answers:

� AppCommand

� HelperCommand

� HandlerCommand

� DBCommand

15. Which of the following statements is true about Django's default implementation of the authentication system?

Answers:

� Django stores passwords in plain text on the user model.

� It returns a UserAccount object is the password for a given username is authenticated.

� Permissions can only be set on a per type of object basis.

� django.contrib.auth will ensure that add, change and delete permissions are created for each Django model defined in an installed application.

16. Which of the following happens when process_exception() returns "None"?

Answers:

� The template response will be applied.

� The response middleware will be applied.

� The default exception handling will be applied.

� None of these.

17. Which of the following is not a predefined log level in Django?

Answers:

� DEBUG

� INFO

� WARNING

� FATAL

18. Which of the following classes uses an HTTP 304 status code?

Answers:

� HttpResponseNotModified

� HttpResponseRedirect

� HttpResponseForbidden

� HttpResponseServerError

19. Which of the following django.template.loader functions will take a list of template names and return the first template that exists?

Answers:

� find_one_template

� find_template

� get_template

� select_template

20. Which of the following is not a built-in Django template loader class?

Answers:

� file.Loader

� cached.Loader

� eggs.Loader

� app_directories.Loader

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