DEA-C02 Exam Dumps | You have implemented external tokenization for a sensitive data column in Snowflake using a UDF that

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Question 50/149

You have implemented external tokenization for a sensitive data column in Snowflake using a UDF that calls an external API. After some time, you discover that the external tokenization service is experiencing intermittent outages, causing queries using the tokenized column to fail. What is the BEST approach to mitigate this issue and maintain data availability while minimizing the risk of exposing the raw data?

A. Implement a masking policy on the column that returns the raw data when the tokenization UDF is unavailable, detected by catching exceptions within the policy logic.

B. Replicate the tokenized table to another Snowflake region and switch to the replica during outages of the primary region. The tokenization service is guaranteed to be available in at least one region.

C. Modify the tokenization UDF to cache tokenization mappings locally within the Snowflake environment. When the external service is unavailable, the UDF can use the cached values.

D. Implement a try-catch block within the UDF. In the catch block, return a pre-defined, non-sensitive default value instead of attempting to call the external tokenization service. You can't return the raw value.

E. Implement a try-catch block within the UDF. In the catch block, return a pre-defined static token value (same value always) instead of attempting to call the external tokenization service. You can't return the raw value.

Correct Answer: D

Returning the raw data (option A) defeats the purpose of tokenization. Caching tokenization mappings locally (option C) introduces security risks and potential data synchronization issues. Replicating the table (option B) doesn't solve the immediate problem of the tokenization service outage; it only addresses regional disaster recovery. Returning a default, non-sensitive value (option D) maintains data integrity and avoids exposing sensitive data during outages. Returning the same static token (Option E) for all values could cause data corruption.

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