Question
A data analyst notices that a certain field that stores customer IDs in a defined format has incorrect values. Which of the following could help the analyst identify the issue?
- A. Outliers
- B. Validation Correct
- C. Redundancy
- D. Completeness
Explanation
Validation checks values against defined rules, such as a required pattern, length or character set for a customer ID, so it reveals entries that do not follow the defined format. Outliers are unusual numeric values, redundancy is duplicated data, and completeness concerns missing values; none of those checks whether a value matches its expected format.
