HELLA interview experience Real time questions & tips from candidates to crack your interview

Python Developer

HELLA
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2 rounds | 2 Coding problems

Interview preparation journey

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Application story
I applied to the relevant jobs according to my role and there are multiple rounds happened and post all, they released the offer.
Preparation
Duration: 2 months
Topics: Python coding using Code Studio AWS practice using hands on experience on personal AWS Account by implementing services as per the use case and reading a lot of system design architectures.
Tip
Tip

Tip 1 : Be consistent
Tip 2 : Always seek help wherever required, diverse your skill set
 

Application process
Where: Naukri
Eligibility: No Criteria as such
Resume Tip
Resume tip

Tip 1: Keep it short and crisp
Tip 2: Mention adjectives and implementation steps

Interview rounds

01
Round
Easy
Online Coding Interview
Duration60 minutes
Interview date18 May 2023
Coding problem0
Web problem/projects3

1. AWS Exercise

Consider having this scenario:
- Different teams deliver batch and real-time data to a central data storage in the cloud.
- Different data consumers can access data to display or run reports on it in their applications. Some of the consumers enrich data with business logic and make data available to other teams.

Provide a target architecture, considering that data should be discoverable, quality assured and reliable.

P.S:
We would appreciate if you would draw an architecture diagram. You can draw with pen and paper or use some apps like draw.io. Feel free to do what you are comfortable with

2. Python Code

Create RESTful API using Python & MySQL.
Make a full CRUD REST API with Python.
We want to create a database in which user data is stored (think registration form on a website). We have access to information such as usernames, passwords, actual names, and ages.

Next, we want to develop a REST API to make the database handling easier. Also, API makes our logic available to any programming language, terminals, and tools like .
We want to read from the database, insert into it, update and delete records — in the simplest way possible.

3. SQL Code Exercise

Solve tasks in SQL or "pseudo" SQL:
===

Each time a vehicle comes into the workshop, any fault codes detected on it are added to a vehicle's Car_History. 
The number of error codes detected can be zero or more. 
In addition, the error codes are grouped into groups and each error code can be in one and only one group.

Write a query that gives us the fault code group Name of the fault Code that has occurred most frequently considering all vehicle histories.

02
Round
Hard
Face to Face
Duration60
Interview date25 May 2023
Coding problem2

1. List-in-Place

Can you write a function that helps you randomize the items of a “List-in-Place”?

Problem approach

import random

def shuffle_list_in_place(lst):
   random.shuffle(lst)

# Example usage:
my_list = [1, 2, 3, 4, 5]
print("Original list:", my_list)

shuffle_list_in_place(my_list)
print("Shuffled list:", my_list)
 

2. Python Question

Easy
20m average time
0/40

What is the code to check whether a particular object belong to a Class or a Subclass?

Problem approach

class ParentClass:
   pass

class SubClass(ParentClass):
   pass

# Create an instance of SubClass
obj = SubClass()

# Check if obj belongs to ParentClass
print(isinstance(obj, ParentClass))  # Output: True

# Check if obj belongs to SubClass
print(isinstance(obj, SubClass))  # Output: True
 

Try solving now

Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

Skill covered: Programming

What is recursion?

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