Practice Data Warehousing Questions and Answers
- In the context of a relational database, which of the following is NOT a characteristic of a candidate key ?
- Which of the following best describes the primary function of a database index?
- Which of the following commands is part of the Transaction Control Language (TCL) in SQL?
- Which of the following best defines the concept of the "Internet of Things" (IoT)?
- Which analytics type is focused on predicting future outcomes?
- What is meant by 'cardinality' in data modeling?
- A surrogate key is:
- Which SQL clause is used to summarize data?
- Data cleansing is primarily concerned with:
- Which of the following best describes a fact constellation schema in a data warehouse?
- In a snowflake schema of a data warehouse, which of the following consequences is most likely as a result of normalization of dimension tables?
- Which of the following best describes a Data Warehouse?
- What is the primary function of ETL in a data warehouse environment?
- Which schema in data warehousing uses a central fact table connected to dimension tables?
- Which of these is NOT an ensemble method?
- A star schema in a data warehouse consists of:
- ETL stands for:
- Which OLAP operation allows users to view data at different levels of granularity?
- A snowflake schema is different from a star schema because:
- Metadata in data warehousing refers to:
- Which of the following is a real-time data warehouse application?
- Which OLAP operation involves focusing on a subset of dimensions (e.g., region=‘Asia’)?
- In a star schema, what is the main advantage of using surrogate keys in fact tables?
- Fact constellation schema is best described as:
- In OLAP, “Slice and Dice” means:
- A Fact Constellation Schema is also called:
- Surrogate keys are used in data warehouses because:
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