Job Interview Questions and Answers Directory

Python Medium technical

Q11. Do you know what is the difference between lists and tuples? Can you give me an example for their usage?

First list are mutable while tuples are not, and second tuples can be hashed e.g. to be used as keys for dictionaries. As an example of their usage, tuples are used when ...

#python #lists #tuples

1 Answer

Python Medium technical

Q12. How do I get a list of all files (and directories) in a given directory in Python?

Following is one possible solution there can be other similar ones:­ ```python import os ``` for dirname,dirnames,filenames in os.walk('.'): #printpathtoallsubdirectories...

#python #lists #file-io

1 Answer

Python Easy technical

Q13. Print the index of a specific item in a list?

In Python, you find the index of an element in a list using the **`list.index()`** method: ```python technologies = ['React', 'Python', 'Docker', 'PostgreSQL'] # Finding ...

#python #lists

0 Answer

Python Medium technical

Q14. How do you iterate over a list and pull element indices at the same time?

You are looking for the enumerate function. It takes each element in a sequence (like a list) and sticks it's location right before it. For example: >>>my_list=['a','b','...

#python #lists

0 Answer

Python Medium technical

Q15. How does Python's list.sort work at a high level? Is it stable? What's the runtime?

In early python­versions, the sort function implemented a modified version of quicksort. However, it was deemed unstable and as of 2.3 they switched to using an adaptive ...

#python #lists

1 Answer

Python Medium technical

Q16. What does the list comprehension do:?

my_list=[(x,y,z)forxinrange(1,30)foryinrange(x,30)forzin range(y,30)ifx**2+y**2==z**2] It creates a list of tuples called my_list, where the first 2 elements are the perp...

#python #lists #comprehensions

0 Answer

Python Easy technical

Q17. Tell me a very simple solution to print every other element of this list?

Use list slicing with a step of 2 (`[::2]`): ```python numbers = [0, 10, 20, 30, 40, 50, 60, 70, 80, 90] print(numbers[::2]) # Output: [0, 20, 40, 60, 80] ```

#python #lists

1 Answer

Python Medium technical

Q18. Given the list below remove the repetition of an element.

words=['one','one','two','three','three','two'] A bad solution would be to iterate over the list and checking for copies somehow and then remove them! A very good solutio...

#python #lists

0 Answer

Python Medium technical

Q19. What is LIST comprehensions features of Python used for?

LIST comprehensions features were introduced in Python version 2.0, it creates a new list based on existing list. It maps a list into another list by applying a function ...

#python #lists #comprehensions

1 Answer

Python Medium technical

Q20. Python ­ How to create a multidimensional list?

There are two ways in which Multidimensional list can be created: By direct initializing the list as shown below to create myList below. >>>myList=[[227,122,223],[222,321...

#python #lists

0 Answer