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Sigmoid Data Engineer Interview Questions and Answers

Updated 13 Jan 2025

6 Interview questions

A Data Engineer was asked 9mo ago
Q. Given a matrix, traverse and print its elements in a spiral manner.
Ans. 

Matrix traversal in spiral manner involves visiting each element of a matrix in a spiral order.

  • Start by traversing the outermost layer of the matrix from top left to top right, then top right to bottom right, bottom right to bottom left, and finally bottom left to top left.

  • Continue this process for the inner layers until all elements are visited.

  • Keep track of the boundaries of the matrix to know when to switch dir...

A Data Engineer was asked 12mo ago
Q. Given the head of a singly linked list, determine if the linked list has a cycle in it. There is a cycle in a linked list if there is some node in the list that can be reached again by continuously followin...
Ans. 

Check for a loop in a linked list by using two pointers moving at different speeds.

  • Use two pointers, one moving at a normal speed and another moving at double the speed.

  • If there is a loop, the two pointers will eventually meet at some point.

  • Alternatively, use a hash set to store visited nodes and check for duplicates.

Data Engineer Interview Questions Asked at Other Companies

asked in Sigmoid
Q1. Next Greater Element Problem Statement You are given an array arr ... read more
asked in LTIMindtree
Q2. If you are given cards numbered 1-1000 and 4 boxes, where card 1 ... read more
asked in Cisco
Q3. Optimal Strategy for a Coin Game You are playing a coin game with ... read more
asked in Sigmoid
Q4. Problem: Search In Rotated Sorted Array Given a sorted array that ... read more
asked in Sigmoid
Q5. K-th Element of Two Sorted Arrays You are provided with two sorte ... read more
A Data Engineer was asked
Q. 

Problem: Search In Rotated Sorted Array

Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer Q queries. Each query is represented by an integer Q[i], and you must d...

Ans. 

This is a problem where a sorted array is rotated and we need to search for given numbers in the array.

  • The array is rotated clockwise by an unknown amount.

  • We need to search for Q numbers in the rotated array.

  • If a number is found, we need to return its index, otherwise -1.

  • The search needs to be done in O(logN) time complexity.

  • The input consists of the size of the array, the array itself, the number of queries, and ...

A Data Engineer was asked
Q. 

Next Greater Element Problem Statement

You are given an array arr of length N. For each element in the array, find the next greater element (NGE) that appears to the right. If there is no such greater elem...

Ans. 

The task is to find the next greater element for each element in the given array.

  • Iterate through the array from right to left.

  • Use a stack to keep track of the next greater element.

  • Pop elements from the stack until a greater element is found or the stack is empty.

  • If the stack is empty, there is no greater element, so assign -1.

  • If a greater element is found, assign it as the next greater element.

  • Push the current ele...

A Data Engineer was asked
Q. 

Zigzag Binary Tree Traversal Problem Statement

Determine the zigzag level order traversal of a given binary tree's nodes. Zigzag traversal alternates the direction at each level, starting from left to righ...

Ans. 

The zigzag level order traversal of a binary tree is the traversal of its nodes' values in an alternate left to right and right to left manner.

  • Perform a level order traversal of the binary tree

  • Use a queue to store the nodes at each level

  • For each level, alternate the direction of traversal

  • Store the values of the nodes in each level in separate arrays

  • Combine the arrays in alternate order to get the zigzag level orde...

A Data Engineer was asked
Q. 

K-th Element of Two Sorted Arrays

You are provided with two sorted arrays, arr1 and arr2, along with an integer k. By merging all elements from arr1 and arr2 into a new sorted array, your task is to identi...

Ans. 

The task is to find the kth smallest element of a merged array created by merging two sorted arrays.

  • Merge the two sorted arrays into a single sorted array

  • Return the kth element of the merged array

Sigmoid Data Engineer Interview Experiences

5 interviews found

Data Engineer Interview Questions & Answers

user image v a adithya

posted on 13 Jan 2025

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
Round 1 - Technical 

(1 Question)

  • Q1. Pyspark, sql, Python.
Round 2 - Technical 

(1 Question)

  • Q1. Python, dsa,PySpark
Round 3 - HR 

(1 Question)

  • Q1. Simple questions

Data Engineer Interview Questions & Answers

user image Anonymous

posted on 23 Sep 2024

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-

I applied via Campus Placement

Round 1 - Coding Test 

General Aptitude test and 3 Medium level coding questions

Round 2 - Technical 

(2 Questions)

  • Q1. Sortr an array of 0,1
  • Ans. 

    Sort an array of 0s and 1s

    • Use a sorting algorithm like counting sort or two-pointer approach

    • Count the number of 0s and 1s and then reconstruct the array

    • Example: Input array = ['0', '1', '0', '1', '1'], Output array = ['0', '0', '1', '1', '1']

  • Answered by AI
  • Q2. Matrix traversal in spiral Manner
  • Ans. 

    Matrix traversal in spiral manner involves visiting each element of a matrix in a spiral order.

    • Start by traversing the outermost layer of the matrix from top left to top right, then top right to bottom right, bottom right to bottom left, and finally bottom left to top left.

    • Continue this process for the inner layers until all elements are visited.

    • Keep track of the boundaries of the matrix to know when to switch directio...

  • Answered by AI

Skills evaluated in this interview

Data Engineer Interview Questions & Answers

user image Shobhit Chaurasiya

posted on 25 Oct 2024

Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
Selected Selected
Round 1 - Coding Test 

Leet Code Medium, string, list, tuple

Data Engineer Interview Questions & Answers

user image Anonymous

posted on 12 Jun 2024

Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via LinkedIn and was interviewed before Jun 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Basic Multiple choice questions

Round 2 - Technical 

(2 Questions)

  • Q1. Two sum problem
  • Ans. 

    The Two Sum problem involves finding two numbers in an array that add up to a specific target sum.

    • Use a hash map to store numbers and their indices for quick lookup.

    • Iterate through the array, checking if the complement (target - current number) exists in the hash map.

    • Example: For array [2, 7, 11, 15] and target 9, return indices [0, 1] since 2 + 7 = 9.

    • Time complexity is O(n) due to a single pass through the array.

  • Answered by AI
  • Q2. Check if there is a loop in linked list
  • Ans. 

    Check for a loop in a linked list by using two pointers moving at different speeds.

    • Use two pointers, one moving at a normal speed and another moving at double the speed.

    • If there is a loop, the two pointers will eventually meet at some point.

    • Alternatively, use a hash set to store visited nodes and check for duplicates.

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Sigmoid Data Engineer interview:
  • Python
  • Cloud

Skills evaluated in this interview

I appeared for an interview in Oct 2021.

Round 1 - Video Call 

(2 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

Started with basic introduction about myself and then 2 DSA problems to be solved on CodeChef or any IDE of your preference. Interviewer was helpful throughout the interview and helped with syntaxes at one point as well.
Parameters tested - 
1. Ability to think of edge test cases.
2. Coding Practices like naming variables and functions properly and using the most suitable access modifiers.
3. Ability to think of time and space complexity and optimise it.
Reaching the correct output was not mandatory but was preferred. Priority to coding practices was given.

  • Q1. 

    Next Greater Element Problem Statement

    You are given an array arr of length N. For each element in the array, find the next greater element (NGE) that appears to the right. If there is no such greater ele...

  • Ans. 

    The task is to find the next greater element for each element in the given array.

    • Iterate through the array from right to left.

    • Use a stack to keep track of the next greater element.

    • Pop elements from the stack until a greater element is found or the stack is empty.

    • If the stack is empty, there is no greater element, so assign -1.

    • If a greater element is found, assign it as the next greater element.

    • Push the current element ...

  • Answered by AI
  • Q2. 

    Zigzag Binary Tree Traversal Problem Statement

    Determine the zigzag level order traversal of a given binary tree's nodes. Zigzag traversal alternates the direction at each level, starting from left to rig...

  • Ans. 

    The zigzag level order traversal of a binary tree is the traversal of its nodes' values in an alternate left to right and right to left manner.

    • Perform a level order traversal of the binary tree

    • Use a queue to store the nodes at each level

    • For each level, alternate the direction of traversal

    • Store the values of the nodes in each level in separate arrays

    • Combine the arrays in alternate order to get the zigzag level order tra...

  • Answered by AI
Round 2 - Video Call 

(2 Questions)

Round duration - 60 minutes
Round difficulty - Medium

Started with basic introduction about myself and then 2 DSA problems to be solved on google doc. Interviewer was helpful throughout the interview.
Parameters tested - 
1. Ability to think of edge test cases.
2. Coding Practices like naming variables and functions properly and using the most suitable access modifiers.
3. Ability to think of time and space complexity and optimise it.
4. Making it to the correct output.

Reaching the correct output was mandatory in best possible time comlexity.

  • Q1. 

    Problem: Search In Rotated Sorted Array

    Given a sorted array that has been rotated clockwise by an unknown amount, you need to answer Q queries. Each query is represented by an integer Q[i], and you must ...

  • Ans. 

    This is a problem where a sorted array is rotated and we need to search for given numbers in the array.

    • The array is rotated clockwise by an unknown amount.

    • We need to search for Q numbers in the rotated array.

    • If a number is found, we need to return its index, otherwise -1.

    • The search needs to be done in O(logN) time complexity.

    • The input consists of the size of the array, the array itself, the number of queries, and the q...

  • Answered by AI
  • Q2. 

    K-th Element of Two Sorted Arrays

    You are provided with two sorted arrays, arr1 and arr2, along with an integer k. By merging all elements from arr1 and arr2 into a new sorted array, your task is to ident...

  • Ans. 

    The task is to find the kth smallest element of a merged array created by merging two sorted arrays.

    • Merge the two sorted arrays into a single sorted array

    • Return the kth element of the merged array

  • Answered by AI
Round 3 - HR 

Round duration - 40 minutes
Round difficulty - Easy

I was asked to introduce myself and general family background check and then discussion around salary negotiation.

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from TIET - Thapar Institute of Engineering And Technology. I applied for the job as Data Engineer in BangaloreEligibility criteriaDecent work experience (for SDE-1 1-2 years experience was expected), self projects in any domain,Sigmoid interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, OOPS, Dynamic ProgrammingTime required to prepare for the interview - 2 monthsInterview preparation tips for other job seekers

Tip 1 : Practice popular questions from Arrays, Binary Trees, LinkedLists from CodeStudio's Interview Problems
Tip 2 : Make sure you are aware of calculating the time and space complexity for every problem you're coding.
Tip 3 : Prepare through Mock Interviews to practice explaining your approach while solving in an actual interview.

Application resume tips for other job seekers

Tip 1 : Describe best of your projects in minimum words. Don't forget to add buzz words like REST APIs/ DB Indexing/ Benchmarking etc if you worked on backend.
Tip 2 : Don't add school achievements like Olympiads or Class Topper in your resume.
Tip 3 : If you've some work experience, put it in a way ,you're marketing yourself. Add terms like 'Created/Owned the Project through entire SDLC' 
Tip 4 : Make sure you mention how your work experience actually impacted the company. Or how your self project can be actually useful to end user.

Final outcome of the interviewSelected

Skills evaluated in this interview

Top trending discussions

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Interview Tips & Stories
1w (edited)
a team lead
Why are women still asked such personal questions in interview?
I recently went for an interview… and honestly, m still trying to process what just happened. Instead of being asked about my skills, experience, or how I could add value to the company… the questions took a totally unexpected turn. The interviewer started asking things like When are you getting married? Are you engaged? And m sure, if I had said I was married, the next question would’ve been How long have you been married? What does my personal life have to do with the job m applying for? This is where I felt the gender discrimination hit hard. These types of questions are so casually thrown at women during interviews but are they ever asked to men? No one asks male candidates if they’re planning a wedding or how old their kids are. So why is it okay to ask women? Can we please stop normalising this kind of behaviour in interviews? Our careers shouldn’t be judged by our relationship status. Period.
Got a question about Sigmoid?
Ask anonymously on communities.

Interview questions from similar companies

I appeared for an interview in Mar 2017.

Interview Questionnaire 

1 Question

  • Q1. Views on their recruiting process
  • Ans. 

    I believe the recruiting process is thorough and well-organized.

    • The company uses a combination of resume screening, interviews, and assessments to evaluate candidates.

    • They have a clear timeline for the hiring process and keep candidates informed of their progress.

    • Feedback is provided to candidates after interviews to help them improve for future opportunities.

  • Answered by AI

Interview Preparation Tips

Round: Test
Experience:

I applied via Approached by Company and was interviewed before Jul 2021. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. How would you write a REST API from scratch? Explain your role in the project.
  • Ans. 

    To write a REST API from scratch, I would follow these steps:

    • Define the resources and endpoints

    • Choose a programming language and framework

    • Implement CRUD operations for each resource

    • Use HTTP methods and status codes correctly

    • Add authentication and authorization

    • Test the API using tools like Postman

    • Document the API using tools like Swagger

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - There are two rounds of technical and one hr.

Skills evaluated in this interview

Are these interview questions helpful?

Interview Preparation Tips

Interview preparation tips for other job seekers - Main focus on Junit. If you are good in it is fine.

Interview Questionnaire 

2 Questions

  • Q1. What do you know about our company?
  • Q2. Are you interested in higher Education?
  • Ans. 

    I value higher education for its role in personal growth and professional development in the tech industry.

    • Higher education provides in-depth knowledge in specialized areas, such as machine learning or cybersecurity.

    • It offers networking opportunities with peers and industry professionals, which can lead to collaborations and job opportunities.

    • Pursuing advanced degrees, like a Master's in Computer Science, can enhance c...

  • Answered by AI

I appeared for an interview in Apr 2021.

Round 1 - Video Call 

(1 Question)

Round duration - 45 Minutes
Round difficulty - Medium

  • Q1. 

    Find the Second Largest Element

    Given an array or list of integers 'ARR', identify the second largest element in 'ARR'.

    If a second largest element does not exist, return -1.

    Example:

    Input:
    ARR = [2,...
  • Ans. 

    Find the second largest element in an array of integers.

    • Iterate through the array to find the largest and second largest elements.

    • Handle cases where all elements are identical.

    • Return -1 if a second largest element does not exist.

  • Answered by AI
Round 2 - HR 

Round duration - 20 Minutes
Round difficulty - Easy

Interview Preparation Tips

Professional and academic backgroundI applied for the job as Data Analyst in BangaloreEligibility criteriaTwo Machine Learning projects, 6 CGPA and aboveindegene interview preparation:Topics to prepare for the interview - SQL, Machine Learning, Tableau, Statistic, Probability, Basic Calculus, ProbabilityTime required to prepare for the interview - 6 monthsInterview preparation tips for other job seekers

Tip 1 : Start with basic probability and statistics
Tip 2 : Prepare Machine Learning well
Tip 3 : Be good with any visualisation tool like Tableau
Tip 4 : Do some problems on kaggle

Application resume tips for other job seekers

Tip 1 : Provide certifications for SQL, Machine Learning etc.
Tip 2 : Include some good ML projects in the resume

Final outcome of the interviewSelected

Skills evaluated in this interview

Sigmoid Interview FAQs

How many rounds are there in Sigmoid Data Engineer interview?
Sigmoid interview process usually has 2 rounds. The most common rounds in the Sigmoid interview process are Technical, Coding Test and HR.
How to prepare for Sigmoid Data Engineer interview?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Sigmoid. The most common topics and skills that interviewers at Sigmoid expect are Clinical Data Management, Clinical SAS Programming, Communication Skills, Elastic Search and Functional Testing.
What are the top questions asked in Sigmoid Data Engineer interview?

Some of the top questions asked at the Sigmoid Data Engineer interview -

  1. check if there is a loop in linked l...read more
  2. Matrix traversal in spiral Man...read more
  3. Two sum prob...read more

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Overall Interview Experience Rating

4.4/5

based on 7 interview experiences

Difficulty level

Moderate 100%

Duration

Less than 2 weeks 100%
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Sigmoid Data Engineer Salary
based on 94 salaries
₹13 L/yr - ₹21.8 L/yr
39% more than the average Data Engineer Salary in India
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Sigmoid Data Engineer Reviews and Ratings

based on 8 reviews

2.7/5

Rating in categories

3.2

Skill development

2.1

Work-life balance

3.0

Salary

3.2

Job security

2.7

Company culture

2.6

Promotions

2.6

Work satisfaction

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