PayatU Interview Experience for Backend Engineer

I applied for Backend Internship Position at PayatU through Off-Campus. I got a call back after 2 days for an Interview. My Interview was Scheduled for 3 PM in Microsoft Teams. It is scheduled for 45 Minutes.

The interviewer starts by Introducing Himself. Later Asked me To Introduce Myself. After Introducing myself, I was asked a coding Question(Easy).

Coding Question –

He has given two lists l1 and l2.

You can perform Arithmetic operations(Addition, Subtraction, multiplication, Division) on list l1 and list l2 and find whether any operation will equal n or not. If yes return True otherwise return False.

For example :

l1 = [3,5,6,8,10]

l2 = [2,7,10,15,20]

Python3

def ispossible(n,l1,l2):
  #code
  #This Article was Contributed by Bhargav Katabathuni.

print(ispossible(5,l1,l2)) # True, because 3 in l1 + 2 in l2 ==n so return True

print(ispossible(-4,l1,l2)) #True, because 3 in l1 – 7 in l2 == n so it will return True

print(ispossible(50,l1,l2)) #True, 5 in l1 * 10 in l2 == 50, Hence Returns True

print(ispossible(10000,l1,l2)) #False, No operation will match the value of n.

Complete the function ispossible() which follows the mentioned requirements.

I solved this in less than 20 minutes.

After this, He dives into Python Basics.

• Differences between list, tuple, and set.
• map() and enumerate() difference.
• what is a lambda function?

The position is based on Backend Development(Django), He asked about Django Basics.

• Explain ORM
• what are Models and Have you used models before in your projects?

As I mentioned Django REST is in my Resume. He asked, “What do serializers do”.

And a few more questions on Django Middlewares and also some normal questions.

• Do you know Docker, I said No
• Do you know Linux, I said No

Then He said Your Interview is over. You can leave now.

The Interview Went Around 35-40 Minutes. But the result is not in my hand. Got Regret Mail the next day. I think I answered all Technical questions Correctly. But lack of Communication skills leads to this result.

The Interviewer is friendly, you can ask for Hints and so on.

Hope this will help. All the Best for your Interview.