In Python, strings are ____, meaning they cannot be changed after they are created.
- constant
- dynamic
- immutable
- mutable
In Python, strings are immutable, which means their content cannot be changed after they are created. If you want to modify a string, you create a new one. This immutability is a fundamental characteristic of Python strings.
In Python, the ____ keyword is used to define a generator function.
- def
- gen
- generator
- yield
In Python, the yield keyword is used to define a generator function. A generator function produces a sequence of values using the yield statement and can be paused and resumed during execution, allowing for efficient iteration over large data sets.
In Python, the ____ method is used to get the number of elements in a set.
- count()
- len()
- length()
- size()
In Python, the len() function is used to get the number of elements in various data structures, including sets. It returns the length or size of the set.
In Python, the ____ method is used to initialize the object’s attributes when an object is created.
- create()
- init()
- new()
- object()
In Python, the __init__() method is a special method (constructor) used to initialize the object's attributes when an object is created from a class. It allows you to set up the initial state of the object.
In Python, _____ is a special method used to overload the ‘+’ operator for custom objects.
- add
- overload
- plus
- sum
In Python, the __add__ method is used to overload the + operator for custom objects. This allows you to define custom behavior when two objects of your class are added together using the + operator.
In Django, how can you add a column to an existing model’s database table?
- Create a new model and migrate it
- Directly modify the database schema
- Django doesn't support adding columns to existing models
- Use the "makemigrations" command
In Django, you can add a column to an existing model's database table by using the "makemigrations" command to create a migration and then applying it with "migrate." Modifying the database schema directly is not recommended.
In Django, how can you add a column to an existing model’s database table?
- Define a new model and migrate the changes using Django's makemigrations and migrate commands.
- Use the add_column method provided by the Django models module.
- Use the ALTER TABLE SQL command directly on the database.
- You cannot add a column to an existing model in Django.
In Django, you define a new model field within the existing model, then create a migration using makemigrations and apply it using migrate to add a new column to the database table associated with the model. Direct SQL commands should be avoided to maintain consistency and manageability.
In Django, how can you store static files, like CSS or JavaScript, so that they can be served efficiently?
- Embed them directly within your templates
- Place them in a directory named static within your app's directory
- Store them in the database for quick access
- Use a CDN to host the static files
In Django, you can store static files efficiently by placing them in a directory named static within your app's directory. Django's STATICFILES_DIRS setting should be configured to collect these files. This approach allows for efficient serving and easy management of static assets.
In Django, how would you extend the User model to include additional fields?
- a. Subclass the User model and add your fields to the subclass.
- b. Modify the Django source code to include additional fields in the User model.
- c. Create a separate model with a one-to-one relationship to the User model to store additional fields.
- d. It's not possible to extend the User model in Django.
In Django, you can extend the User model by creating a separate model with a one-to-one relationship to the User model to store additional fields. This approach maintains the integrity of the User model. Options a and b are not recommended as they can lead to issues during migrations and upgrades. Option d is incorrect.
In Django, the ____ file is used to store the settings of a project, such as database configurations.
- models
- settings
- templates
- views
In Django, the settings.py file is used to store project-level settings, including database configurations, middleware, and other global settings. It's a central configuration file for a Django project.