Not able to understand the code

#1

I am not able to understand the code provided for this question as it contains many topics that have not been covered yet. Please provide a detailed explanation for this question

#2

Please mention the video name and the time stamp.

#3

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.