Q. What is the result of the unofficial use of fields in data records?

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Q. What is a common issue with cryptic values in old legacy systems?

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Q. Which of the following is a violation of a basic business rule in a personnel and payroll system?

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Q. What is the problem with reused primary keys when capturing data in a data warehouse?

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Q. When identifiers for product codes are different in various systems, what problem does this cause?

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Q. What is the issue with inconsistent values for policy types in different legacy systems?

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Q. What problem is associated with multipurpose fields that can be used differently by various departments?

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Q. What integration issues arise in an auction company when the same customer is both a buyer and a seller?

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Q. Why do integration problems often arise in legacy systems?

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Q. What is the primary goal of data cleansing for a data warehouse?

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Q. Where does data pollution typically occur in the context of a data warehouse?

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Q. Why is it challenging to address data pollution problems from old operational systems?

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Q. How does data aging affect data quality in source systems?

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Q. What is a potential issue related to heterogeneous system integration in the context of data quality?

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Q. How does a good database design contribute to data quality?

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Q. What is the role of entity integrity and referential integrity rules in preventing data pollution?

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Q. What can be a result of incomplete information at the time of data entry for an entity?

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Q. How does the entry of generic values into mandatory fields affect data quality?

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Q. What role does data verification play in preventing data corruption?

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Q. In a data warehouse, why is deduplication of names and addresses essential?

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