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HCLTech Data Analyst Interview Questions, Process, and Tips
Top HCLTech Data Analyst Interview Questions and Answers
- Q1. What is unwanted safety effect?
- Q2. What is data types ?
- Q3. Difference between Having and Where clause in SQL
HCLTech Data Analyst Interview Experiences
19 interviews found
shrishti patel
Selected
(1 Question)
- Q1. Python and sql related question
(1 Question)
- Q1. Pandas numpy visualisation sql
Alteryx data processing and reporting
chakri ck
(2 Questions)
- Q1. About joins and sql and python
- Q2. About data analysis , model building
Anonymous
I applied via Campus Placement
29 questions with normal level difficulty
(3 Questions)
- Q1. Tell me about your self
- Q2. What is a dax
- Ans.
DAX stands for Data Analysis Expressions and is a formula language used in Power BI, Excel, and other Microsoft tools for data analysis.
DAX is used to create custom calculations, measures, and aggregations in data models.
It is similar to Excel formulas but designed for more complex data analysis tasks.
DAX functions can be used to manipulate and analyze data in Power BI reports and dashboards.
- Q3. Explain your project
uday kuresi
I applied via Referral and was interviewed in Sep 2024. There was 1 interview round.
(2 Questions)
- Q1. How to handle incremental refresh
- Ans.
Incremental refresh is a process of updating only new or changed data in a dataset.
Identify the key columns that can be used to track changes in the data
Use date or timestamp columns to filter out new or updated records
Implement a process to regularly check for new data and update the dataset accordingly
- Q2. Difference between inner join and left join
- Ans.
Inner join returns only the matching rows between two tables, while left join returns all rows from the left table and the matching rows from the right table.
Inner join only includes rows that have a match in both tables
Left join includes all rows from the left table, even if there is no match in the right table
Example: Inner join - SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id
Example: Left join - SEL...
Skills evaluated in this interview
HCLTech interview questions for designations
Ujjwal Sinha
(2 Questions)
- Q1. Difference between a Data Warehouse and Data lake?
- Ans.
Data warehouse is structured and used for reporting and analysis, while data lake is unstructured and used for exploration and experimentation.
Data warehouse stores structured data for easy access and analysis.
Data lake stores unstructured and raw data for exploration and experimentation.
Data warehouse is typically used for reporting and business intelligence.
Data lake is used for data science and machine learning proj...
- Q2. Difference between Having and Where clause in SQL
- Ans.
HAVING is used with GROUP BY to filter grouped rows, WHERE is used to filter individual rows.
HAVING is used with GROUP BY to filter grouped rows based on aggregate functions
WHERE is used to filter individual rows before any grouping is done
HAVING is used after GROUP BY in a query, WHERE is used before GROUP BY
Example: SELECT department, AVG(salary) FROM employees GROUP BY department HAVING AVG(salary) > 50000;
Example: ...
Skills evaluated in this interview
Get interview-ready with Top HCLTech Interview Questions
sunny 123
I applied via Walk-in and was interviewed in Aug 2024. There was 1 interview round.
(2 Questions)
- Q1. He asked about vlookup
- Q2. He asked about pivote tabla
Interview Preparation Tips
Bhagirath Saini
I applied via Walk-in and was interviewed in May 2024. There were 3 interview rounds.
(3 Questions)
- Q1. SQL normal question and cloud question
- Q2. No of employee with age more that 50
- Q3. Difference between adsl and blob storage
- Ans.
ADSL is a type of internet connection technology, while Blob storage is a type of cloud storage service.
ADSL (Asymmetric Digital Subscriber Line) is a type of broadband connection that uses existing telephone lines to transmit data.
Blob storage is a type of cloud storage service provided by platforms like Azure, AWS, and Google Cloud.
ADSL typically has slower upload speeds compared to download speeds, while Blob storag...
(1 Question)
- Q1. Normal sql question and cloud question
(1 Question)
- Q1. Salary expectation
Skills evaluated in this interview
(2 Questions)
- Q1. Calculate avg value and standard deviation from given data
- Ans.
Calculate avg value and standard deviation from given data
Calculate the average value by summing all data points and dividing by the total number of data points
Calculate the standard deviation by finding the square root of the average of the squared differences between each data point and the mean
Example: Data points - 5, 7, 9, 11. Average = (5+7+9+11)/4 = 8. Standard deviation = sqrt(((5-8)^2 + (7-8)^2 + (9-8)^2 + (11
- Q2. From given graph answer below questions
SONAL SHARMA
(2 Questions)
- Q1. Roles and responsibilities , user stories and requirements gathering
- Q2. Why u want to join
(2 Questions)
- Q1. Why UST GLOBAL u are joining
- Q2. What challenges you faced
Selected
I applied via Approached by Company and was interviewed in Mar 2024. There was 1 interview round.
(2 Questions)
- Q1. I do work in hcl because I became to a good business career
- Q2. I am not a employee or manager I'm developer in every business activities with the help of motivation
Interview Preparation Tips
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HCLTech Data Analyst Interview Process
based on 12 interviews in last 1 year
2 Interview rounds
- Technical Round 1
- Technical Round 2
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