Tokopedia Data Analyst Interview Questions and Answers

Q1. How do you setup a Dark Store?
Ans. 
Setting up a Dark Store involves converting a retail store into a fulfillment center for online orders.
• Select a suitable location for the Dark Store, preferably in a centralized area with good access to transportation.

• Optimize the layout of the store for efficient picking, packing, and shipping of orders.

• Implement inventory management systems to track stock levels accurately and prevent stockouts.

• Train staff on order f...read more
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Q2. How do joins work in the simplest manner?
Ans. 
Joins combine data from two or more tables based on a related column.
• Joins are used to retrieve data from multiple tables based on a related column

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

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id
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Q3. Write a basic query explaining the order of execution?
Ans. 
The order of execution in a query determines the sequence in which operations are performed.
• 1. The order of execution in a query typically follows the sequence: FROM, WHERE, GROUP BY, HAVING, SELECT, ORDER BY.

• 2. The FROM clause specifies the tables involved in the query.

• 3. The WHERE clause filters the rows based on specified conditions.

• 4. The GROUP BY clause groups the rows that have the same values into summary rows.

• 5...read more
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Q4. Difference between Group By and Distinct?
Ans. 
Group By is used to aggregate data based on a specific column, while Distinct is used to remove duplicate rows from a result set.
• Group By is used with aggregate functions like COUNT, SUM, AVG, etc.

• Distinct is used to retrieve unique values from a column or set of columns.

• Group By can be used to group data based on multiple columns, while Distinct operates on individual columns only.
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Asked to write different SQL queries.
1. Moving average of lf previous 10 days
2. For a data which records in and out time of an employee. How many employees were present in the office at a given time
3. A/B testing vs pre-post testing

1. Had to come up with a method to give a score to each user based on FRM(frequency, recency, monetory)
2. Guesstimate: how many burgers does McD sells in a day

Q1. Output resukt number of rows basis the joins
Ans. 
The output result number of rows depends on the type of join used.
• Inner join returns only the matching rows from both tables

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

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

• Full outer join returns all rows from both tables

• Cross join returns the Cartesian product of both tables
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Q2. Output result number of rows basis the joins
Ans. 
The question asks to output the number of rows based on joins.
• The number of rows in the output depends on the type of join used.

• Inner join only returns rows that have matching values in both tables.

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

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

• Full outer join returns all rows from both tables.

• U...read more
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All and all it was a wholesome interview with a mix of sql, python questions

Good the case study was fairly doable

Q1. Why you want 2 join Myntra
Ans. 
I want to join Myntra because of its innovative approach to e-commerce and its strong focus on customer satisfaction.
• I am impressed by Myntra's use of data analytics to personalize the shopping experience for customers.

• I admire Myntra's commitment to staying ahead of trends in the fashion industry.

• I believe Myntra offers a dynamic and challenging work environment that will allow me to grow as a data analyst.
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Q2. Salary expectations
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Q1. Guestimates question: How many women's drive red car in the Bangalore
Ans. 
It is impossible to accurately estimate the number of women driving red cars in Bangalore without specific data.
• There is no specific data available on the number of women driving red cars in Bangalore.

• Estimating the number of women driving red cars in Bangalore would require access to vehicle registration data or a survey of car owners.

• Factors such as car ownership trends among women and the popularity of red cars woul
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Q2. How will achieve GMV if your budget is over
Ans. 
Achieve GMV by optimizing marketing channels, improving product offerings, and enhancing user experience.
• Optimize marketing channels to reach a larger audience

• Improve product offerings to increase customer interest and sales

• Enhance user experience to encourage repeat purchases and higher order values
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Questions were on sql , python and java

Duration was 10 minutes