Simple Interview questions for Django Developer

django_python_interview_questions.md

Django/Python Questions

1. Find the most frequent integer in a list, Test list : [3,5,6,3,9,0,3,8,3,1,3]

2. Find the common elements of 2 lists

       a = [2,3,4,1,1,3,6]
       b = [2,8,9,1,3]

   find integers which are in list a but not list b do not use loops !

3. Sort this list of tuples by second item in each tuple

       awesome_list = [(2,3,1),(6,8,6),(9,1,4),(4,4,0),(2,3,3),(6,2,1)]

4. Implement a function to reverse a string (a list of characters), in-place.

   None -> None
   [''] -> ['']
   ['f', 'o', 'o', ' ', 'b', 'a', 'r'] -> ['r', 'a', 'b', ' ', 'o', 'o', 'f']

Cannot use index cursors

5. What are Generators ? The Fibonacci sequence is a series of numbers where a number is found by adding up the two numbers before it. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, Write a Fibonacci Sequence Generator.

6. How do you export data from one database to another having the same model but with no data ? lets say we have a database A with model AppDetails, how do you export data of this model to another database B having same model

7. Difference between StackedInline and TabularInline, if we want to add a model having Manytomany foreign key in django admin, which type of admin model should we use ?

8. What is the Data Structure used for indexing in DBMS ? When to not use indexing ?

9. Given an array of integers, write a function that returns true if there is a triplet (a, b, c) that satisfies a2 + b2 = c2

   Input: arr[] = {3, 1, 4, 6, 5}
   Output: True
   There is a Pythagorean triplet (3, 4, 5).
   
   Input: arr[] = {10, 4, 6, 12, 5}
   Output: False
   There is no Pythagorean triplet.

10. How to get all logged-in user list or count in Django ?