Data Warehousing Interview Questions For Freshers

Explain the concept of data granularity.

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Why do we need data warehousing?

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What are the main components of a data warehouse?

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What is the difference between OLTP and OLAP systems?

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Explain the ETL process in data warehousing.

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What is data aggregation, and why is it important in data warehousing?

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What is a dimension table?

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What is a fact table?

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What is a star schema?

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What is a snowflake schema?

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What are slowly changing dimensions?

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What is a data mart?

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What is a data warehouse?

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

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What is the role of a data warehouse architect?

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What are the challenges in building a data warehouse?

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What is data mining?

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Data Warehousing Intermediate Interview Questions

What is a slowly changing dimension Type 2?

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Explain the concept of data mining techniques.

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What is a shared dimension?

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What is the difference between a fact table and a dimension table?

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What is the role of a data warehouse administrator?

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What is data profiling?

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What is a data warehouse bus matrix?

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What is a star join?

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What is a surrogate key?

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What is a data cube?

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Explain the concept of data partitioning.

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What is denormalization, and when should it be used in data warehousing?

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What is a conformed dimension?

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What is a bridge table?

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Data Warehousing Interview Questions For Experienced

What is a materialized view in data warehousing?

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Explain the concept of a data warehouse star schema with multiple fact tables.

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What is a slowly changing dimension Type 1?

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What is hybrid OLAP (HOLAP)?

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What is data lineage in data warehousing?

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Explain the concept of a data warehouse snowflake schema with multiple fact tables.

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What is the role of a data warehouse project manager?

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What is data virtualization?

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Explain the concept of a Slowly Changing Dimension Type 3.

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What is a data warehouse appliance?

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What is dimensional modeling?

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What is data federation in data warehousing?

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Explain the concept of a star schema with multiple hierarchies.

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What is a data warehouse toolkit?

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What is the role of a data warehouse business analyst?

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What is data scrubbing?

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Explain the concept of a data vault in data warehousing.

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