Airbnb Business Analyst Interview Questions and Answers

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

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. Asking about yourself and asking of other knowledge and consulting knowledge.
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Excel

8 sql questions
1 hard, 4 easy and 3 medium

Q1. Tell me about yourself. Your responsibilities in current role.
Ans. 
I am a Business Analyst with experience in data analysis, process improvement, and stakeholder management.
• Analyze data to identify trends and insights

• Improve business processes through automation and optimization

• Manage relationships with stakeholders to gather requirements and ensure project success
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Q2. SQL based basic questions. Output of left join and inner right join
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Q3. Any notable project you’ve done which made any remarkable change in business
Ans. 
Implemented a data analytics project that optimized inventory management, resulting in a 20% reduction in costs.
• Analyzed historical sales data to forecast demand and optimize inventory levels

• Implemented a new inventory management system based on data-driven insights

• Collaborated with cross-functional teams to ensure successful implementation

• Monitored key performance indicators to track the impact of the project
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Q4. Difference between DDL and DML
Ans. 
DDL stands for Data Definition Language and is used to define the structure of database objects. DML stands for Data Manipulation Language and is used to manipulate data within the database.
• DDL is used to create, modify, and delete database objects like tables, indexes, etc.

• DML is used to insert, update, delete, and retrieve data from the database.

• Examples of DDL statements include CREATE TABLE, ALTER TABLE, DROP TABLE...read more
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Q5. How null behaves in different types of joins
Ans. 
Null behaves differently in different types of joins in SQL
• In INNER JOIN, rows with NULL values are excluded from the result set

• In LEFT JOIN, rows with NULL values from the left table are included in the result set

• In RIGHT JOIN, rows with NULL values from the right table are included in the result set

• In FULL OUTER JOIN, rows with NULL values from either table are included in the result set
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