Infinx Data Engineer Interview Questions and Answers

It was well designed

Q1. Basic Questions about data warehousing
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Q2. Dbt Scenarios
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Hackerearth problem on reversing the string & one more array question

Q1. Reverse the string
Ans. 
Reverse a given string
• Use built-in functions like reverse() in Python

• Iterate through the string in reverse order and append characters to a new string

• Use stack data structure to reverse the string
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Q2. SQL based windowing function
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Q1. What are cyclic linked lists
Ans. 
Cyclic linked lists are linked lists where the last node points back to the first node, creating a loop.
• Cyclic linked lists have no NULL pointers, making it difficult to determine the end of the list.

• They can be used to efficiently represent circular data structures like a round-robin scheduling algorithm.

• Detecting cycles in a linked list can be done using Floyd's cycle-finding algorithm.
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Q2. Coding question from BST
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Q1. About data modelling and Architecture
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Q2. Real world problem and solution
Ans. 
Real world problem: Predicting customer churn in a subscription-based service
• Collect and analyze customer data such as usage patterns, demographics, and interactions

• Use machine learning algorithms to identify factors leading to churn

• Implement targeted retention strategies based on the analysis

• Monitor and evaluate the effectiveness of the strategies over time
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Q1. Sql technical round
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Q2. About various azure services
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Q1. About my work area
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Q2. Managerial and company fit
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Test kn logical reasons , date time , train , relationship questions.

Basic python questions

Sql queries not too difficult asked to write on google document.

Q1. It’s was for contractual position and had only one round which is technical and HR combined
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Questions testing spatial Ability

Q1. Tell me something about yourself
Ans. 
I am a detail-oriented and organized individual with experience in data entry.
• I have worked as a data entry operator for XYZ Company for 2 years.

• I am proficient in using Microsoft Excel and other data entry software.

• I have a strong attention to detail and accuracy, ensuring data integrity.

• I am able to handle large volumes of data and meet tight deadlines.

• I am a fast learner and adapt quickly to new systems and processe
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Q2. My strength are I am a self motivator and hard working discipline person short term goals is a get a job and my long term goal is to achieve a good position where can I build my career as well as an organi...read more
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Q3. Why should we hair you
Ans. As a fresher I bring a lot of tablets and terms of skills and ability and I very fixability and adaptive to learn new things which mean I will able to contribute something capable to the growth of the company
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Q4. What is your weekness
Ans. 
My weakness is that I can be overly meticulous, which sometimes slows down my work.
• I tend to double-check my work multiple times to ensure accuracy.

• I sometimes spend more time than necessary on small details.

• I am working on finding a balance between thoroughness and efficiency.

• For example, when entering data, I may spend extra time verifying each entry to avoid errors.
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Round duration - 60 minutes
Round difficulty - Medium

This round had 2 questions with Easy to Medium level of difficulty

Q1. 
Problem: Total Area of Overlapping Rectangles
You are given two rectangles situated on a 2-D coordinate plane, which may overlap. Your task is to compute the total area covered by these rectangles.
Input...read more
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Q2. 
Rearrange Array: Move Negative Numbers to the Beginning
Given an array ARR consisting of N integers, rearrange the elements such that all negative numbers are located before all positive numbers. The orde...read more
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Round duration - 70 minutes
Round difficulty - Medium

Standard DS/Algo round with 2 questions

Q1. 
Middle Node of a Linked List Problem Statement
Given the head node of a singly linked list, return a pointer to the middle node of the linked list. If there are an odd number of nodes, return the middle o...read more
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Q2. 
All Prime Numbers Less Than or Equal to N
Given a positive integer N, your task is to return all the prime numbers less than or equal to N.
Note:
1) A prime number is a number that has only two factors:...read more
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Round duration - 30 minutes
Round difficulty - Easy

This was a Technical Cum HR round where I was first asked some basic Java-related concepts and then we discussed my expectations from the company, learnings and growth in the forthcoming years. I would suggest be honest and try to communicate your thoughts properly in these types of rounds to maximise your chances of getting selected.