What is the role of synthetic data in testing?

• A. It replaces real data to protect privacy while enabling test cases.
• B. It adds more realism.
• C. It is used to test privacy breaches.
• D. It is used only for performance testing.

Answer: (C)

The main idea is that synthetic data is used in testing to evaluate privacy protections without exposing real individuals. By generating artificial data that mirrors the patterns of real data, testers can probe whether a system could leak sensitive information or be exploited to infer attributes, all in a safe, controlled environment. This makes it possible to test privacy defenses, re-identification risks, and privacy-preserving techniques without risking real data. While synthetic data can sometimes replace real data or support other testing goals, its strongest, most distinctive role in testing is enabling privacy breach testing and assessment of leakage risk.