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316 django developer interview questions shared by candidates

1. Difference between List and Tuples 2. Difference between Tuples and Dictionary (Still wondering why will someone ask this!?) 3. How to concat two dictionaries? 4. What is ** in Python? 5. What happens when we run any program in Python? 6. How CSRF works? 7. Give any example of Middlewares in Django 8. Inheritance in Python (Diamond problem) 9. Explain MVC/MVT in Django 10. REST API 11. List comprehension in Python
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Python/Django Developer

Interviewed at Fractal

4.1★
Dec 10, 2018

1. Difference between List and Tuples 2. Difference between Tuples and Dictionary (Still wondering why will someone ask this!?) 3. How to concat two dictionaries? 4. What is ** in Python? 5. What happens when we run any program in Python? 6. How CSRF works? 7. Give any example of Middlewares in Django 8. Inheritance in Python (Diamond problem) 9. Explain MVC/MVT in Django 10. REST API 11. List comprehension in Python

You should implement a simple REST API with Django REST Framework to synchronize remote mobile devices executing Tasks. In your model you should represent the concept of a Customer, where each customer has: - An email address - A password Each customer may posses zero or more Devices, where each device has: - A unique UUID For each customer there is a list of Tasks, where each Task has: - An ID (INTEGER) - A state (INTEGER) Devices can execute Tasks. Devices can only execute tasks belonging to their owner. When a device starts executing a task, it has 2 minutes to complete it. Tasks can be retried an arbitrarily large amount of times. Devices have a mobile connectivity and may go offline at any time (may not be able to call any REST API). The result of an execution of a Task by a Device can be: - Success (in that case the Task is completed) - Failure (the task should be re-executed) - Execution Time Exceeded (the device did not complete in 2 minutes and the task should be re-executed) The same Task can only be executed by one device at a time. One Device can execute at most one Task at a Time. Different Devices can execute different tasks concurrently. Coding Questions - Using Django Rest Framework, define the model that you suggest to use. Feel free to add new fields if you need it to correctly implement the synchronization algorithm - Define the set of possible states of a Task - Add an API method to let a Device retrieve the set of Tasks it may execute - Add an API method to let a Device notify the beginning of the execution of a Task - Add an API method to let a Device notify the result of an execution of a Task - How would you suggest to configure permissions for the previous model (coding is NOT required)?
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Back-end Developer (Python Django)

Interviewed at ErnieApp

Apr 15, 2020

You should implement a simple REST API with Django REST Framework to synchronize remote mobile devices executing Tasks. In your model you should represent the concept of a Customer, where each customer has: - An email address - A password Each customer may posses zero or more Devices, where each device has: - A unique UUID For each customer there is a list of Tasks, where each Task has: - An ID (INTEGER) - A state (INTEGER) Devices can execute Tasks. Devices can only execute tasks belonging to their owner. When a device starts executing a task, it has 2 minutes to complete it. Tasks can be retried an arbitrarily large amount of times. Devices have a mobile connectivity and may go offline at any time (may not be able to call any REST API). The result of an execution of a Task by a Device can be: - Success (in that case the Task is completed) - Failure (the task should be re-executed) - Execution Time Exceeded (the device did not complete in 2 minutes and the task should be re-executed) The same Task can only be executed by one device at a time. One Device can execute at most one Task at a Time. Different Devices can execute different tasks concurrently. Coding Questions - Using Django Rest Framework, define the model that you suggest to use. Feel free to add new fields if you need it to correctly implement the synchronization algorithm - Define the set of possible states of a Task - Add an API method to let a Device retrieve the set of Tasks it may execute - Add an API method to let a Device notify the beginning of the execution of a Task - Add an API method to let a Device notify the result of an execution of a Task - How would you suggest to configure permissions for the previous model (coding is NOT required)?

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