Hello, World with Flask

FAQ

1. Why Flask is called a microframework?
Answer: 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 Flask-Extensions.

2. Why flask is not good for production?
Answer: Flask's built-in server is not suitable for production as it doesn't scale well and by default serves only one request at a time.

3. What is WSGI in Flask?
Answer: WSGI (Web Server Gateway Interface) is an interface between web servers and web apps for python. mod_wsgi is an Apache HTTP server module that enables Apache to serve Flask applications.

4. Who created Flask?
Answer:  Armin Ronacher created the Flask framework. Flask was born out of April fool Joke in 2011.

5. 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.

6. 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.

7. 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.
example - if __name__ == "__main__":
          app.run(host="0.0.0.0", port=8080)
          
          

MCQ

1. Flask is a web development framework, created in which language ?
    a) C
    b) Java
    c) Python
    d) Javascript
    
Answer: c) Python


2.  Is the Flask framework open source?

    a) TRUE
    b) FALSE
    c) Can be True can be False also
    d) unpredictable  
    
Answer: a) TRUE


3. The defalut port of Flask is ?
    a) 3000
    b) 2000
    c) 5000
    d) 4000
    
Answer: c) 5000


4. The default host of Flask is localhost(127.0.0.1)
    a) True
    b) False
  
Answer: a) True


5. Flask is a?

    a) miniframework
    b) microframework
    c) peraframework
    d) nanoframework
    
Answer: b) microframework


6. 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

Answer: d) All of the above

7. WHat is the command to install flask ?
    a) pip install Flask
    b) pip install flask
    c) pip install FLASK
    d) All of the above
    
Answer: d) All of the above


8. Can we change the default host and port of Flask?
    a) Yes 
    b) No
    
Answer: a) Yes