Blackbuck Insights Interview Questions and Answers for Freshers

Q1. Describe your workflow of the last project
Ans. 
Developed ETL pipeline to ingest, clean, and analyze customer data for personalized marketing campaigns
• Gathered requirements from stakeholders to understand data sources and business objectives

• Designed data model to store customer information and campaign performance metrics

• Implemented ETL process using Python and Apache Spark to extract, transform, and load data

• Performed data quality checks and created visualizations ...read more
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Q2. What are the different transformations you have used
Ans. 
I have used various transformations such as filtering, joining, aggregating, and pivoting in my data engineering projects.
• Filtering data based on certain conditions

• Joining multiple datasets together

• Aggregating data to summarize information

• Pivoting data from rows to columns or vice versa
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Q1. 3rd largest salary from each department(window function)
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Q1. What is dual mode in Power BI
Ans. 
Dual mode in Power BI allows users to switch between DirectQuery and Import modes for data sources.
• Dual mode allows users to combine the benefits of both DirectQuery and Import modes in Power BI.

• Users can switch between DirectQuery and Import modes for different data sources within the same report.

• DirectQuery mode connects directly to the data source for real-time data retrieval, while Import mode loads data into Power...read more
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Q1. All employees having same salary in the smae department sql and pysprk
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Q2. How to create pipeline in databricks
Ans. 
To create a pipeline in Databricks, you can use Databricks Jobs or Apache Airflow for orchestration.
• Use Databricks Jobs to create a pipeline by scheduling notebooks or Spark jobs.

• Utilize Apache Airflow for more complex pipeline orchestration with dependencies and monitoring.

• Leverage Databricks Delta for managing data pipelines with ACID transactions and versioning.
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Q3. Palindrome, 2nd char in every word make is to upper case, sql rank and dense rank releated questions , given 2 tables country and city we need to calculate total population in each continent by joining the...read more
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Q4. String manuplation questions inpython
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Two coding questions

Q1. DBMS questions, keys
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Q2. SQL related queries
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