Question 1

What is a Flask?

Accepted Answer

Flask is a microweb framework for Python that provides APIs and libraries through which we can build web applications from small to medium-sized, develop personal websites or blogs, develop the Rest API, and efficiently work with no-SQL databases like DynamoDB.

Question 2

What do you know about the WSGI?

Accepted Answer

WSGI stands for Web Server Gateway Interface. This provides the protocol for web servers on how to communicate with a web application.

Question 3

List the databases with which Flask is more compatible.

Accepted Answer

Flask supports SQLite, MySQL, DbAdapters, Oracle, PostgreSQL, Sybase, Firebird, and MongoDB databases.

Question 4

What are app routing and template inheritance in Flask?

Accepted Answer

App routing is to map the URLs to a specific function that will handle the logic for that URL. URLs can help users navigate more easily. Template inheritance allows for the generation of the common section in all web pages so that developers don't need to write the HTML code multiple times.

Question 5

Why should we use Flask over Django?

Accepted Answer

Flask is better for prototype development in the Python framework. It can also be used to create a microservice with server-less applications. In contrast to Django, it is easy to learn and offers many APIs.

Question 6

What is the G object used in Flask?

Accepted Answer

G is a global variable in the flask. It is used to create global variables in a flask. This object works as a request in a separate Flask object and is not suitable for storing data within requests.

Question 7

What are the extensions that we can use to create the RESTFul application in Flask?

Accepted Answer

There are numerous extensions that Flask offers; some of them are Flask-RESTX, Connexion-Flask-RESTFUL, and Flask-API.

Question 8

How do we use URLs in Flask?

Accepted Answer

By calling the view function with parameters and then assigning the values to generate URLs.

Question 9

What are the Flask error handlers?

Accepted Answer

Flask uses the HTTP error code when an error occurs. If the error code is within 400 to 499, we can tell that the mistake was made by the client-side request. If the error code is within 500 to 599, then this error is from a server-side request.

Question 10

How can we create an admin interface in Flask?

Accepted Answer

Creating the extension Flask-Admin will group all individual views in classes. Similarly, we can create a Flask-App builder extension that can be used for the admin interface.

Question 11

In which scenarios is the Flask framework suitable?

Accepted Answer

The following are the scenarios where we can use a flask:

If you're developing an API or ML model. 
 
 When developers need to translate SOAP APIs into JSON, 
 
 If we need to secure cameras by API abstraction. 
 
 If you're working with a database with no SQL, like DynamoDB. 
 
 Whenever developers need to do ElasticSearch.

Question 12

How can we request context in the flask?

Accepted Answer

We can do this whenever the application receives a request from the system, and another way to do this is by manually calling app.test_request_context.

Question 13

What is Flask Sijax?

Accepted Answer

It is an in-built library that is available in Python. It uses JSON while passing data to a server. This library can work well with Ajax in web applications.

Question 14

Describe how Flask memory management works.

Accepted Answer

Flask comes with an in-built garbage collector that collects unused data and frees up space. And manages the memory using private heap space. Although it is not accessible to developers, some of them can access it using API tools. Finally, data allocation is performed by Flask memory management.

Question 15

Explain Jsonify.

Accepted Answer

It is the method used to return JSON data in a flask. It automatically sets the correct response headers and content type for JSON responses. Also, return JSON-formatted data from your route handlers. This provides the convenience of creating APIs that return JSON data.

Question 16

What is the purpose of the “app.run()” method in Flask?

Accepted Answer

This method is used to run the application and set the necessary settings for development, like the server and loading the application.

Question 17

How do we ensure that flask applications are thread-safe when running with multiple threads?

Accepted Answer

When the flask application is running with multiple threads, we need to lock around a particular code that is used for shared data. By doing so, one thread gets to execute that code at a time, while other threads need to wait until the lock is released.

Question 18

How do we secure the Flask application?

Accepted Answer

By using a web server gateway interface (WSGI) server. This provides flasks with a secure environment. In addition, to add more security layers, we can encrypt your data using a server certificate.

Question 19

What is the purpose of using static files in Flask templates?

Accepted Answer

The main purpose behind using static files is to store mages, CSS, JavaScript, and other files that are not specific to a particular Flask template. These files are not processed by the flask template engine but rather served from a separate server.

Question 20

How do I install the flask framework?

Accepted Answer

First, we need to use the pip package manager by writing this command: pip install flask   
Once installed, we need to install flask using this command: pip install flask.

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