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Amazon Business Analyst Interview Questions and Answers

Updated 4 Dec 2024

Q1. Use of case in SQL why and when we use it.

Ans.

CASE in SQL is used to apply conditional logic to queries and manipulate data based on specific conditions.

  • CASE is used to create conditional expressions in SQL

  • It allows for the manipulation of data based on specific conditions

  • CASE can be used in SELECT, WHERE, and ORDER BY clauses

  • It can be used to create calculated fields or to filter data based on specific criteria

  • CASE can also be used in conjunction with aggregate functions like SUM and COUNT

  • Example: SELECT name, CASE WHEN...read more

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Q2. Do you have knowledge on Aspect WFO and SQL?

Ans.

Yes, I have knowledge on Aspect WFO and SQL.

  • I have experience working with Aspect Workforce Optimization (WFO) software.

  • I am proficient in writing and executing SQL queries for data analysis and reporting.

  • I have used SQL to extract and manipulate data from databases for business analysis purposes.

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Q3. complex SQL query - using Window Function, Date and Time

Ans.

Using Window Function, Date and Time in a complex SQL query

  • Use ROW_NUMBER() to assign a unique number to each row within a partition

  • Use PARTITION BY to divide the result set into partitions

  • Use ORDER BY to specify the order of rows within each partition

  • Utilize functions like LAG(), LEAD(), SUM(), AVG(), etc. within the window frame

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Q4. How would you rate yourself in SQL

Ans.

I rate myself as proficient in SQL with experience in writing complex queries and optimizing database performance.

  • Proficient in writing complex SQL queries

  • Experience in optimizing database performance

  • Familiar with database management systems like MySQL, SQL Server, Oracle

  • Ability to work with large datasets and perform data analysis

  • Knowledge of SQL functions, joins, subqueries, and indexes

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Q5. Different types of Joins

Ans.

Different types of Joins are Inner Join, Left Join, Right Join, and Full Join.

  • Inner Join: Returns rows when there is a match in both tables.

  • 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 Join: Returns rows when there is a match in one of the tables.

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Q6. Different joins in sql

Ans.

Different types of joins in SQL include inner join, left join, right join, and full outer join.

  • Inner join: Returns rows when there is a match in both tables

  • 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 outer join: Returns all rows when there is a match in either table

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Interview Process at Amazon Business Analyst

based on 40 interviews
3 Interview rounds
Technical Round
One-on-one Round - 1
One-on-one Round - 2
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