Data Processing Data Validation and Quality 3

Question 1

What is a data audit trail?

Accepted Answer

A record of all changes made to data over time

Answer

A data audit trail is a chronological log that records who accessed or modified data, enabling accountability and traceability.

Question 2

Which technique detects whether two related fields contain logically consistent values?

Accepted Answer

Cross-field validation

Answer

Cross-field validation compares multiple fields to ensure they are logically consistent, such as verifying that a start date precedes an end date.

Question 3

What is the primary purpose of data profiling?

Accepted Answer

To analyze and understand the structure, content, and quality of data

Answer

Data profiling examines the content and structure of a dataset to identify quality issues, patterns, and anomalies before processing.

Question 4

What does 'data accuracy' mean in data quality terms?

Accepted Answer

Data correctly represents the real-world values it is intended to model

Answer

Data accuracy means that the values stored in a dataset truthfully reflect the actual real-world objects or events they represent.

Question 5

Which approach is used to fill in missing values in a dataset?

Accepted Answer

Data imputation

Answer

Data imputation is the process of replacing missing or null values with estimated values using statistical or algorithmic methods.

Data Processing Practice Test