AAIA Exam Dumps | An IS auditor notes the combined number of records utilized within the training, validation, and testing

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Question 25/111

An IS auditor notes the combined number of records utilized within the training, validation, and testing data sets exceeds the total number of records in the original data set. Which of the following is MOST important for the auditor to determine?

A. Whether the training, validation, and testing data sets were created in the correct order

B. Whether data leakage occurred from utilizing overlapping records in the data sets

C. Whether a sufficient number of records were utilized in the training data set

D. Whether the validation data set utilized the same number of records as the training data sets

Correct Answer: B

If the combined size of the training, validation, and testing sets exceeds the original data size, it suggests that records may have been reused across sets. This can lead to data leakage, where the model has access to test or validation information during training, resulting in overly optimistic performance metrics.
"Data leakage invalidates model evaluation because it introduces unintended data overlap. Auditors must ensure that the training, validation, and test sets are strictly partitioned." Options A, C, and D refer to process order or quantity, but only B addresses the root issue of compromised model integrity due to overlapping data.
Reference: ISACA Advanced in AI Audit™ (AAIA™) Study Guide, Section: "AI Fundamentals and Technologies," Subsection: "Data Partitioning and Leakage Risks"

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