OLX Business Analyst Interview Questions and Answers

SQL queries - 3. Was asked to write on notepad using the table structure given by interviewer

Q1. Cohort Analysis in google analytics
Ans. 
Cohort analysis in Google Analytics helps track the behavior of specific groups of users over time.
• Cohort analysis groups users based on a common characteristic or behavior, such as sign-up date or acquisition channel.

• It helps in understanding user retention, engagement, and conversion rates for different cohorts.

• Example: Analyzing the retention rate of users who signed up in a particular month compared to users who si
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Q2. Types of join in sql and their differences
Ans. 
Types of joins in SQL include inner join, outer join, left join, right join, and full join.
• Inner join: returns rows when there is a match in both tables

• Outer join: returns all rows from both tables, filling in NULLs for missing matches

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

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

• Full joi...read more
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Basis CAT like aptitude with 2 simple python coding question

Q1. What Central limit theorem
Ans. 
The Central Limit Theorem states that the sampling distribution of the sample mean approaches a normal distribution as the sample size increases.
• States that the sampling distribution of the sample mean will be approximately normally distributed regardless of the shape of the population distribution

• Helps in making inferences about the population mean based on the sample mean

• Important concept in statistics and hypothesis...read more
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Python, SQL, Quant, Statistics, Numpy

Q1. SQL, Python, Puzzle total 9Q
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Q2. Table, Query, 2 puzzle, Python 1 code (4 Sub code)
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Q1. Yet to declare result for the round 2 i feel +ve for round 2 result lets se
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Q1. Find 3rd highest salary using SQL
Ans. 
Use SQL query with ORDER BY and LIMIT to find 3rd highest salary.
• Use SELECT statement to retrieve salary column

• Use ORDER BY clause to sort salaries in descending order

• Use LIMIT 2,1 to skip first two highest salaries and retrieve the third highest salary
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Q2. Queries on self join
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Q1. Questions on Power B, DAX etc.,
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Q1. They will ask about your profile and past experience.
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Q1. A peer level colleague will ask some basic knowledge check questions
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This is literally a live coding test. For analytics expect SQL, python, R.

Q1. Interviewed by a manager of another team
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Q1. Interviewed by dotted line reporting manager
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Q1. Cross functional interview
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Q1. Core Values Interview
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Q1. Asking about yourself and asking of other knowledge and consulting knowledge.
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Technical + Analytics
I gave my coding test this august 2024, it was purely based on SQL coding
8 question, 3 easy, 3 intermediate and 3 hard.

Q1. Introduction and explain any one of the projects plus what was the analytics you used
Ans. 
Implemented a project to optimize marketing campaigns using predictive analytics
• Developed a predictive model to identify the most effective marketing channels

• Utilized data from past campaigns to train the model

• Used techniques such as regression analysis and decision trees to analyze the data

• Generated insights on customer behavior and preferences to improve campaign targeting
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Q2. SQL coding, shared screen and was asked to find cumulative sum of cost for a table.
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