HCL Data Engineer Interview Questions

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HCL

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Data Engineer Interview

Sep 26, 2019

Anonymous employee

San Jose, CA

Other Data Engineer interview reviews for HCL

Data Engineer Interview

Mar 20, 2025

Anonymous interview candidate

Bangalore Rural

Declined offer

Positive experience

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Related searches: HCL reviews | HCL jobs | HCL salaries | HCL benefits

HCL interviews HCL Data Engineer interviews HCL interview

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Want the inside scoop on your own company?

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Followed companies

Stay ahead in opportunities and insider tips by following your dream companies.

Job searches

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Top companies for "Compensation and Benefits" near you

IBM

3.6★Compensation and benefits

Concentrix

3.6★Compensation and benefits

Dell Technologies

3.5★Compensation and benefits

Hewlett Packard Enterprise | HPE

3.6★Compensation and benefits

Data Engineer Interview

Sep 26, 2019

Anonymous employee

San Jose, CA

Other Data Engineer interview reviews for HCL

Data Engineer Interview

Mar 20, 2025

Anonymous interview candidate

Bangalore Rural

Declined offer

Positive experience

Accepted offer

Positive experience

Average interview

Application

I applied through a recruiter. The process took 4 weeks. I interviewed at HCL (San Jose, CA) in May 2019

Interview

3 rounds interview, two with HCL manager and one with FB manager. each of them takes about an hour. Interview process takes about 1 month. and after accepting offer, takes 3 weeks to start new position

Interview questions [1]

Question 1

sql and python

2 Answers

Average interview

Application

I applied through an employee referral. I interviewed at HCL (Bangalore Rural) in Aug 2024

Interview

During the interview, I demonstrated my problem-solving skills through examples. I connected my background to the role, answered questions confidently, and expressed enthusiasm for the company's mission and values and hello good bye.

Interview questions [1]

Question 1

about data engineering? and about data science?

Answer question

Data Engineer Interview

Feb 25, 2024

Anonymous interview candidate

No offer

Positive experience

Average interview

Application

I applied online. The process took 1 week. I interviewed at HCL in Feb 2024

Interview

I was contacted by the HR of the company directly and schedule the interview. Best part is the interview was scheduled on weekends. It was a virtual interview. I was instructed to code in the interview. Since, the requirement was of PySpark and SQL Data Engineer, I was given questions mostly on SQL and PySpark

Interview questions [7]

Question 1

Have I worked in Agile methodology? And What is Agile?

Answer question

Question 2

What is PySpark DataFrame? And How it is difference between Pandas and PySpark Dataframe?

Answer question

Question 3

What is SparkSession? And explain different components of the Spark.

Answer question

Question 4

data Name | Age Sai | 28 Mouni | 25 Ram | 20 Above is a dataset, and do the following functions. Q.1-read the data Q.2-create dataframe Q.3-print schema

Answer question

Question 5

Emp table emp id, emp name, emp dept id 1, harry, 5 2, Ron, 5 3, Neville, 10 Dept table dept id, dept name 5, IT 10, ENGG 20, MARKETING Write inner join and its output.

Answer question

Question 6

Input data: Emp ID, Name, Location 1, Gaurav, Pune,Bangalore,Hyd 2, Rishab, Mumbai,Bangalore,Pune Required output EmpID, Name, Location 1, Gaurav,Pune 1,Gaurav,Bangalore 1,Gaurav,Hyderabad write the PySpark query to get the required output

Answer question

Question 7

What is the difference between Where and Having clause?

Answer question

Data Engineer Interview

Sep 9, 2023

Anonymous employee

Bengaluru

Accepted offer

Positive experience

Difficult interview

Application

I interviewed at HCL (Bengaluru)

Interview

Every thing went smooth in 2 rounds of interview. First I got the call from Recruitment agent and collect all the required information . After two days same person come up the with interview slot for the Data Engineer role. Faced 2 rounds of technical and 1 round of HR discussion. 1. Technical 2. Technical and managerial 3. HR and pay discussion

Interview questions [1]

Question 1

Spark Architecture Spark optimizations Techniques Memory Management in Python Threads in Python

1 Answer