HCL interview experience

This is a part of my job interviews series.

👉🏼 Background

It was a pen paper-based exam, no computer was there. The discussion was more focused on solving RegEx-based problems.

Regex for credit card number detection
- You can check this SO question for answers.
Real-life use cases of decorator
- Provided example of login_required decorator in Django
Reversal of a list not using split or any function
- Explained the following example
```
my_list = ['a', 'b', 'c']
my_reversed_list = my_list[::-1]
```
IP address validation using regex
- You can check out this SO question for answers.
Code to find out how many vowels are there in a string
- You can check this SO answer.
Example of a decorator function
- Written a timer decorator as mentioned here on GeekforGeeks website.
- You can checkout codetiming from real-python.

It was a walk-in and many candidates were there, more than 50.
The interview process was not well structured and could have been improved.
I did not expect the discussions will be so much concentrated on RegEx, though I had the basic knowledge of RegEx I was not able to come up with solutions at that time.

I have appeared in 20+ interviews so far. You can check out my job interview series for the rest of the interviews experiences.

Let me know if you have any further questions. Thank You 🙏🏼