Data Warehouse Interview Questions For Freshers

What are the benefits of using a data warehouse?

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What is a data warehouse?

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What is dimensional modeling?

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What are the different types of data warehouse schema designs?

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What is an OLAP cube?

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What are the key components of a data warehouse architecture?

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What is ETL?

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What is meant by data cleansing in the context of a data warehouse?

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What is data transformation in ETL?

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What is a star schema?

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What is a snowflake schema?

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What is a fact table in a data warehouse?

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What is a dimension table in a data warehouse?

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What are slowly changing dimensions?

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What is a surrogate key in a data warehouse?

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What are aggregates in a data warehouse?

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Data Warehouse Intermediate Interview Questions

What are the various types of OLAP?

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What is a conformed dimension?

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What is an ETL process?

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How do you handle data quality issues in a data warehouse?

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Explain the concept of data aggregation in a data warehouse.

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What is a slowly changing dimension Type 1?

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What is the difference between star schema and snowflake schema in terms of performance?

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Explain the concept of data lineage in a data warehouse.

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What is the difference between a data warehouse and a database?

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Explain the process of partitioning tables in a data warehouse.

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What is a materialized view in a data warehouse?

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How can you handle slowly changing dimensions efficiently?

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What is the difference between a star schema and a snowflake schema?

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Explain the concept of slowly changing dimension Type 2.

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What is an aggregate table in a data warehouse?

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How can you improve the performance of a data warehouse?

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What is a data mart?

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What is the role of metadata in a data warehouse?

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What is star join optimization?

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Data Warehouse Interview Questions For Experienced

What is a bridge table in a data warehouse?

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What are the key performance indicators (KPIs) in a data warehouse?

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How can you handle historical data in a data warehouse?

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What is data profiling in a data warehouse?

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Explain the concept of data staging in ETL.

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What is a star schema join?

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How do you handle late arriving dimensions?

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What is a degenerate dimension in a data warehouse?

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Explain the concept of slowly changing dimension Type 3.

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How can you optimize the performance of an OLAP cube?

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What is a junk dimension in a data warehouse?

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Explain the concept of data granularity in a data warehouse.

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How do you handle slowly changing dimensions Type 4?

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What is a degenerate dimension in a data warehouse?

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What are the different types of fact tables in a data warehouse?

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Explain the concept of drill-through in an OLAP cube.

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What is a ragged hierarchy in a data warehouse?

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How can you handle duplicate data in a data warehouse?

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What is an OLTP system?

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Explain the concept of derived measures in an OLAP cube.

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What are the challenges faced in data warehouse implementation?

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What is data purging in a data warehouse?

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