Petco Senior Analyst Interview Questions and Answers

Q1. Related to replenishment
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Q2. As a senior what do I bring to the table
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Q1. Joins ans sub queries in sql
Ans. 
Joins and subqueries are used in SQL to combine data from multiple tables and perform complex queries.
• Joins are used to combine rows from two or more tables based on a related column between them.

• Subqueries are queries nested within another query and can be used to retrieve data based on the result of the outer query.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• Example: SELECT * FROM t...read more
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Q2. Dashboard from visualization tools
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Dashboards from visualization tools are used to display key metrics and insights in a visually appealing and easy-to-understand format.
• Dashboards help in monitoring performance and identifying trends.

• They can be customized to show specific KPIs or metrics.

• Popular visualization tools include Tableau, Power BI, and Google Data Studio.
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Q1. Round 1: This is an initial screening round. You will be tested on the foundation of multiple technologies. SQL (Majority), Python, Visualization skillset and some basic statistics. Round 2 : Advance t...read more
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Q1. Prepare All theoretical questions related to SQL and excel. Learn everything about your resume so that you will be able to explain each and everything about the resume.
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Q2. Difference between Vlookup and Xlookup ?
Ans. 
Vlookup searches for a value in the first column of a range and returns a value in the same row from a specified column. Xlookup is a more powerful and flexible function that can search in any direction and return multiple results.
• Vlookup searches vertically in a table and returns a value from a specified column.

• Xlookup can search in any direction (horizontal, vertical, or both) and return multiple results.

• Vlookup requ...read more
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Q3. Difference between Subquery and CTE. Which is better?
Ans. 
Subquery is a query nested within another query, while CTE is a temporary result set defined within a query. Both have their own use cases.
• Subquery is enclosed in parentheses and can be used in SELECT, INSERT, UPDATE, or DELETE statements.

• CTE is defined using the WITH keyword and can be referenced multiple times in a query.

• CTEs are more readable and easier to maintain compared to subqueries.

• Subqueries are useful when t...read more
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Q4. No of records returned after applying left and inner join on 2 tables.
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Q5. Pivot the table in SQL using case when statements.
Ans. 
Pivoting a table in SQL using case when statements
• Use the CASE WHEN statement to create new columns based on specific conditions

• Use the SUM or COUNT function to aggregate data in the pivoted table

• Group by the remaining columns to ensure correct aggregation

• Example: SELECT id, SUM(CASE WHEN category = 'A' THEN value END) AS A_total FROM table_name GROUP BY id;
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Business Case Questions Based on a scenario where the company's Sales is Declining. How we can address the issue using transaction data

Q1. What is Gross profit
Ans. 
Gross profit is the total revenue minus the cost of goods sold.
• Gross profit = Total revenue - Cost of goods sold

• It represents the profit a company makes from its core business activities before deducting operating expenses.

• It does not include expenses such as taxes, interest, and other non-operating costs.

• Gross profit margin is calculated as (Gross profit / Total revenue) * 100%

• Example: If a company has total revenue o...read more
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Q2. GP = Sales - COGS
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Q1. SQL based questions
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Q1. Role, responsibilities, situational based questions
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Q1. How would you share data with impact
Ans. 
I would create visually appealing presentations, use storytelling techniques, and provide real-life examples to share data with impact.
• Create visually appealing presentations to make data more engaging

• Use storytelling techniques to help the audience connect with the data on a personal level

• Provide real-life examples to illustrate the impact of the data in practical terms
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Write a a python code to reverse string without slicing.