Flask Interview Questions And Answers

Flask Interview Questions list for experienced

  1. How to get the development version of the Flask framework?
  2. How to add the mailing feature in the Flask Application?
  3. What is WSGI?
  4. Who created Flask?
  5. Why do we use Flask?
  6. How to install Flask on Linux?
  7. What is the default host port and port of Flask?
  8. How to change default host and port in Flask?
  9. Which Flask extension can be used to create an Ajax application?
  10. How to use the Flask commands?
  11. How to get query String in Flask?
  12. How to integrate Twitter or Similar API with the Flask Application?
  13. Why is Flask called a Microframework?
  14. What are the benefits of using the Flask framework?
  15. Is the SQLite database built-in Flask?
  16. What do you mean by template engines in the Flask framework?
  17. What do you mean by Thread local object in Flask?
  18. What is the difference between Django and Flask? Why should one choose Flask?
  19. Describe the features of Forms extension for Flask.
  20. What is the g object in Flask? How does it differ from the session object?
  21. What is the application context in Flask?
  22. In what ways can you connect to a database in Flask?
  23. How to create a RESTful application in Flask?
  24. How to debug a Flask Application?
  25. What type of Applications can we create with Flask?

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Top Flask interview questions and answers for freshers and experienced

What is Flask ?

Answer : Flask is a web microframework for Python based on \"Werkzeug, Jinja 2 and good intentions\". BSD-licensed

Questions : 1 :: How to get the development version of the Flask framework?

The development version of the Flask framework can be obtained using the below-mentioned commands. git clone https://github.com/pallets/flask cd flask && python3 setup.py...View answers

Questions : 2 :: How to add the mailing feature in the Flask Application?

To send emails, we need to install the Flask-Mail flask extension using the below-given command. pip install Flask-Mail Once installed, then we need to use Flask Config API to configure...View answers

Questions : 3 :: What is WSGI?


WSGI stands for the Web Server Gateway Interface. It is a Python standard defined in PEP 3333. WSGI is pronounced as “Whiskey.” It is a specification that describes how a web server...View answers

Questions : 4 :: Who created Flask?

Armin Ronacher created the Flask framework. Flask was born out of April fool Joke in 2011.

Questions : 5 :: Why do we use Flask?

Flask is used to create Web applications using Python programming language. Flask is a microframework that is also used for quick prototyping web and networking based...View answers

Questions : 6 :: How to install Flask on Linux?


On Linux, Flask can be installed using Python’s package manager, pip. Use the below command to install Flask. pip install...View answers

Questions : 7 :: What is the default host port and port of Flask?

Flask default host is a localhost (127.0.0.1), and the default port is 5000.

Questions : 8 :: How to change default host and port in Flask?

Flask default host and port can be changed by passing the values to host and port parameters while calling run method on the app. from flask import Flask app =...View answers

Questions : 9 :: Which Flask extension can be used to create an Ajax application?


We can use Flask-Sijax to create an Ajax application. Flask-Sijax is an extension that uses Python/JQuery. It is available on PyPI and can be installed using pip. Sijax stands for Simple Ajax. Once...View answers

Questions : 10 :: How to use the Flask commands?

As a result of the Flask installation, we also get access to a command-line application called Flask. There are various commands that we can use. Use Flask –help on the command line to see all...View answers

Questions : 11 :: How to get query String in Flask?

We can get the argument’s value using the request object in Flask. An example is shown below. from flask import Flask from flask import request   app =...View answers

Questions : 12 :: How to integrate Twitter or Similar API with the Flask Application?

To integrate with Flask, we can make use of a Flask extension called Flask-Social. It not only helps in authenticating users from Twitter but also other social platforms or accounts such as Facebook...View answers

Questions : 13 :: Why is Flask called a Microframework?

Flask is called a microframework because Flask only provides core features such as request, routing, and blueprints. For other features, such as Caching, ORM, forms, etc., we need to make use of...View answers

Questions : 14 :: What are the benefits of using the Flask framework?

Some benefits of using the Flask framework are: It has an inbuilt development server. It has vast third-party extensions. It has a tiny API and can be quickly learned by a web developer. It is...View answers

Questions : 15 :: Is the SQLite database built-in Flask?

SQLite is in-built with Python. To use the database in Flask, we need not install any additional Flask-Extension. Inside the view, we can import SQLite and write SQL queries for interacting with the...View answers

Questions : 16 :: What do you mean by template engines in the Flask framework?

 A template is a file that contains two types of data, i.e., static and dynamic. Dynamic data in a template is populated during run time. Flask makes use of Jinja2 template engine to let...View answers

Questions : 17 :: What do you mean by Thread local object in Flask?

In Flask, thread-safety has been provided out of the box. We can use objects such as current_app, g, and request without worrying about problems related to locking and concurrency. Moreover, we need...View answers

Questions : 18 :: What is the difference between Django and Flask? Why should one choose Flask?

Django is also a web development framework created in the Python programming language. It is a full-featured web application framework with a lot of features that are built into it, such as an Admin...View answers

Questions : 19 :: Describe the features of Forms extension for Flask.

Forms in Flask can be implemented by using an extension called Flask-WTF. Flask-WTF is created by integrating Flask with WTForms. WTForms is a python-based form rendering and validation library. It...View answers

Questions : 20 :: What is the g object in Flask? How does it differ from the session object?

Flask’s g object is used as a global namespace for holding any data during the application context. g object is not appropriate for storing the data between requests. The letter g, in a sense,...View answers

Questions : 21 :: What is the application context in Flask?

The application context in Flask relates to the idea of a complete request/response cycle. It keeps a track of application-level data during a request or a CLI command. We make use of g and...View answers

Questions : 22 :: In what ways can you connect to a database in Flask?

Flask works with most of the RDBMSs, such as PostgreSQL, SQLite, and MySQL. However, to connect with databases, we must make use of the Flask-SQLAlchemy extension. It makes database interaction and...View answers

Questions : 23 :: How to create a RESTful application in Flask?

 A RESTful application can be created in Flask with the help of many extensions. Some proven Flask extensions are listed...View answers

Questions : 24 :: How to debug a Flask Application?

 Flask comes with a development server, and the development server has a Debug Mode. The Debug mode can be set to true when we call the run method of the Flask Application object. Given below...View answers

Questions : 25 :: What type of Applications can we create with Flask?

With Flask, we can create almost all types of web applications. We can create Single Page Application, RESTful API based Applications, SAS applications, Small to medium size websites, static...View answers
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