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    which of the following are the benefits of using the flask framework? it has an inbuilt development server. it has vast third-party extensions. it is wsgi compliant. all of the above

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    Top 31 Python Flask Interview Questions With Answers

    List of the most frequently asked Python Flask Interview Questions with answers and programming examples to crack any Flask intervIew.

    List of the most frequently asked Python Flask Interview Questions with answers and programming examples to crack any Flask interview:

    Flask framework has quite a large following and has become more relevant, with teams adopting it seamlessly as it can be learned quickly. We have listed some of the questions that help in the interview preparation of this Framework.

    Try to answer these questions by yourself based on the concepts learned from this tutorial series and then read the answers for a better learning experience.

    => Check Here To See A-Z Of Flask Training Tutorials

    Flask Interview Questions With Answers

    Q #1) What is Flask?Answer: Flask is a web development framework created in Python language. This Framework is based on the robust foundation of Jinja2 templates engine and Werkzeug comprehensive WSGI web application library.

    Flask is created by Armin Ronacher and is developed as a part of the Pallets Projects, which is a collection of Python web development libraries such as Flask, Click, ItsDangerous, Jinja, MarkupSafe, and Werkzeug.

    Q #2) Is the Flask framework open source?Answer: Yes, the Flask framework is open-source. The source code of the Flask framework is available here . It is released under the BSD-3 Clause “New” or “Revised” License.Q #3) How to get the development version of the Flask framework?Answer: 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 develop

    Q #4) How to add the mailing feature in the Flask Application?Answer: 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 MAIL-SERVER, MAIL_PORT, MAIL_USERNAME, MAIL_PASSWORD, etc. Then we need to import Message Class, instantiate it and form a message object before sending the email by using the mail.send() method.

    An example is shown below.

    from flask_mail import Mail, Message

    from flask import Flask

    app = Flask(__name__)

    mail = Mail(app) @app.route(“/mail”) def email():

    msg = Message( “Hello Message”, sender=”[email protected]”, recipients=[“[email protected]”])

    mail.send(msg)

    Q #5) What is WSGI?Answer: 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 communicates with a web application.Q #6) Who created Flask?Answer: Armin Ronacher created the Flask framework. Flask was born out of April fool Joke in 2011.Q #7) Why do we use Flask?Answer: 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 applications.Q #8) How to install Flask on Linux?Answer: On Linux, Flask can be installed using Python’s package manager, pip.Use the below command to install Flask.

    pip install Flask

    Q #9) What is the default host port and port of Flask?Answer: Flask default host is a localhost (127.0.0.1), and the default port is 5000.Q #10) How to change default host and port in Flask?Answer: 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 = Flask(__name__)

    @app.route("/") def index():

    return "Hello, World!"

    if __name__ == "__main__":

    app.run(host="0.0.0.0", port=8080)

    Q #11) Which Flask extension can be used to create an Ajax application?Answer: 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 configured and initialized, it enables the use of @flask_sijax decorator, which we can use for making Ajax aware of the views in a Flask Application.

    Q #12) How to use the Flask commands?Answer: 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 the options. Default commands are routes, run, and shell. This utility provides commands from Flask, extensions, and the application.

    Q #13) How to get query String in Flask?Answer: 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 = Flask(__name__)

    @app.route("/") def index():

    val = request.args.get("var")

    return "Hello, World! {}".format(val)

    if __name__=="__main__":

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    Flask MCQ Questions & Answers

    Practice these Flask MCQ questions with answers and their explanation which will help you to prepare for various competitive exams, placements, interviews etc.

    Flask MCQ Questions & Answers

    Flask MCQs : This section focuses on "Flask" of Python Frameworks. These Multiple Choice Questions (MCQ) should be practiced to improve the Flask skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

    1. Flask is a web development framework created in ___________ language.

    A. C B. Java C. Python D. Javascript View Answer

    2. Is the Flask framework open source?

    A. TRUE B. FALSE

    C. Can be true or false

    D. Can not say View Answer

    3. It is released under the ___________ Clause.

    A. BSD-0 B. BSD-1 C. BSD-2 D. BSD-3 View Answer

    4. How to add the mailing feature in the Flask Application?

    A. pip install Flask

    B. pip install Flask-Mail

    C. install Flask-Mail

    D. pip Flask-Mail View Answer

    5. WSGI stands for the?

    A. Write Server Gateway Interface

    B. Web Static Gateway Interface

    C. Web Server Gateway Interface

    D. Web Server Gateway Interact

    View Answer

    6. Flask default port is?

    A. 2000 B. 3000 C. 4000 D. 5000 View Answer

    7. Flask default host is a localhost (127.0.0.1)

    A. TRUE B. FALSE

    C. Can be true or false

    D. Can not say View Answer

    8. Flask is called a?

    A. miniframework B. microframework C. peraframework D. nanoframework View Answer

    9. Which of the following are the benefits of using the Flask framework?

    A. It has an inbuilt development server.

    B. It has vast third-party extensions.

    C. It is WSGI compliant.

    D. All of the above View Answer

    10. Flask works with most of the RDBMSs, such as?

    A. PostgreSQL B. SQLite C. MySQL D. All of the above View Answer

    11. ______________ is used as a global namespace for holding any data during the application context.

    A. Flask a object B. Flask f object C. Flask g object D. Flask q object View Answer

    12. Forms in Flask can be implemented by using an extension called ?

    A. Flask-ATF B. Flask-WTF C. Flask-GTM D. Flask-ZIP View Answer

    13. The __________ decorator in Flask is used to bind URL to a function.

    A. route() B. rend() C. read() D. write() View Answer

    14. Which function takes up the floating point number as argument?

    A. reverse() B. show_blog() C. route() D. revision() View Answer

    15. Armin Ronacher created the Flask framework.

    A. TRUE B. FALSE

    C. Can be true or false

    D. Can not say View Answer

    16. The _________ method of request.cookies attribute is used to read a cookie.

    A. read() B. get() C. set() D. find() View Answer

    17. We can create an Admin interface in Flask using the Flask-Admin extension.

    A. TRUE B. FALSE

    C. Can be true or false

    D. Can not say View Answer

    18. To release a session variable use __________ method.

    A. go() B. pull() C. pop() D. explode() View Answer

    19. To integrate with Flask, we can make use of a Flask extension called Flask-Social.

    A. TRUE B. FALSE

    C. Can be true or false

    D. Can not say View Answer

    20. Which of the following provides SMTP interface to Flask application?

    A. Flask Sijax B. Flask SQLAlchemy C. Flask WTF D. Flask Mail View Answer Discussion

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