Udaan Data Analyst Interview Questions and Answers for Experienced

Approx 30 questions which are to be solved in 1 hour. Questions include logical and mathematical questions along with basic ML and stats questions

Q1. Basic questions related to Python and SQL
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Q1. Advance SQL questions and 1 case study
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Q1. Basic ML questions and Business acumen questions
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It was basic MCQ related to Javascript

Q1. Asked basic questions related to array and SQL
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Q1. Asked question to test the business context
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Basic Apititude Questions

Q1. Difference between WHERE and HAVING??
Ans. 
WHERE is used to filter rows before grouping, HAVING is used to filter groups after grouping.
• WHERE is used with SELECT statement to filter rows based on a condition

• HAVING is used with GROUP BY statement to filter groups based on a condition

• WHERE is applied before data is grouped, HAVING is applied after data is grouped

• Example: SELECT * FROM table WHERE column = 'value'

• Example: SELECT column, COUNT(*) FROM table GROUP B
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Q2. Where- Row Level Filters Having-Aggregate Filters
Ans. 
Row level filters are applied before aggregations, while aggregate filters are applied after aggregations.
• Row level filters are used to filter individual rows of data before any aggregations are performed.

• Aggregate filters are used to filter the aggregated results after the data has been grouped and summarized.

• Row level filters are typically applied using WHERE clause in SQL, while aggregate filters are applied using H...read more
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Q1. Why do you wanna join Uber?
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Q2. Best Company Ever
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It was easy consisting of sql and excel questions

Questions from arrays and strings and some aptitude questions

Q1. How to merge 2 csv files
Ans. 
To merge two CSV files, you can use software like Microsoft Excel or programming languages like Python.
• Open both CSV files in a software like Microsoft Excel.

• Copy the data from one CSV file and paste it into the other CSV file.

• Save the merged CSV file with a new name.

• Alternatively, you can use programming languages like Python to merge CSV files by reading both files, combining the data, and writing to a new file.
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Q2. Basic questions on arrays
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Q1. 3 reasons why u choose this company
Ans. 
I applied to this company because of its reputation in the industry, opportunities for growth, and company culture.
• Reputation in the industry - I have heard great things about the company's innovative projects and successful track record.

• Opportunities for growth - The company offers various training programs and career advancement opportunities for employees.

• Company culture - I value a positive work environment and the...read more
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Q1. Questions on python
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I was asked a medium-level SQL question that involved the RANK function.

Q1. SQL related questions like joins
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Q2. Types of join in sql
Ans. 
Types of join in SQL include inner join, left join, right join, and full outer join.
• Inner join returns only the matching records from both tables.

• Left join returns all records from the left table and the matching records from the right table.

• Right join returns all records from the right table and the matching records from the left table.

• Full outer join returns all records when there is a match in either the left or rig
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Q3. Practical use of left join
Ans. 
A left join is used to combine data from two tables based on a common column, including all records from the left table.
• Left join returns all rows from the left table and the matching rows from the right table.

• It is useful when you want to retrieve all records from the left table, even if there are no matches in the right table.

• The result of a left join will have NULL values in the columns from the right table where th...read more
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Q4. Number of rows after applying certain join operations
Ans. 
The number of rows after applying join operations depends on the type of join used and the data in the tables being joined.
• Inner join retains only the rows that have matching values in both tables

• Left join retains all rows from the left table and the matched rows from the right table

• Right join retains all rows from the right table and the matched rows from the left table

• Full outer join retains all rows when there is a
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Q5. Difference between vlookup in excel and some function in sql
Ans. 
VLOOKUP in Excel is used to search for a value in a table and return a corresponding value, while SQL functions like JOIN and WHERE are used to retrieve data from multiple tables based on specified conditions.
• VLOOKUP is specific to Excel and works on a single table, while SQL functions can work on multiple tables.

• VLOOKUP requires the table to be sorted in ascending order, while SQL functions do not have this requiremen...read more
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Simple SQL & Excel test

Q1. Will Face hiring Manager
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