Crucial Exams

GCP Professional Cloud Security Engineer Practice Question

Your company is preparing to share a BigQuery dataset that contains an E.164-formatted phone_number column (for example, "+14155551234") with an external analytics partner. The partner only needs the last four digits for grouping, and compliance policy requires that every preceding character be replaced by a single, repeated masking symbol so that records appear like "+########1234". You will run a one-time Cloud DLP job to de-identify the column and leave all other fields untouched. Which transformation should you configure to meet the requirement with the least implementation effort?

  • Numeric bucketing transformation that replaces phone numbers with predefined range buckets.

  • Character masking transformation configured to mask all but the last four characters of PHONE_NUMBER, using "#" as the masking symbol and reverse_order enabled.

  • Deterministic cryptographic transformation that encrypts the phone numbers with a customer-managed key and uses surrogate annotations.

  • Redaction transformation that removes values identified as PHONE_NUMBER.

GCP Professional Cloud Security Engineer
Ensuring data protection
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