You need to migrate invoice documents stored on-premises to Cloud Storage. The documents have the following storage requirements: - Documents must be kept for five years. - Up to five revisions of the

Question

Options

• AEnable retention policies on the bucket, and use Cloud Scheduler to invoke a Cloud Function to
• BEnable retention policies on the bucket, use lifecycle rules to change the storage classes of the
• CEnable object versioning on the bucket, and use Cloud Scheduler to invoke a Cloud Functions
• DEnable object versioning on the bucket, use lifecycle conditions to change the storage class of the

• A
  4% (1)
• B
  8% (2)
• C
  24% (6)
• D
  64% (16)

Explanation

Option D is correct because object versioning natively handles the requirement for storing up to five revisions of the same document, and lifecycle conditions (not custom code) can automatically transition objects to lower-cost storage classes (e.g., Nearline, Coldline, Archive) after 365 days - all without any custom development, which directly satisfies the "minimize operational and development costs" constraint.

Options A and C are wrong for the same reason: both rely on Cloud Scheduler + Cloud Functions to manage storage tier transitions. This introduces custom code, added operational overhead, and higher costs when native lifecycle rules can accomplish the same thing automatically.

Option B is wrong because retention policies and object versioning serve different purposes. Retention policies prevent objects from being deleted before a set period - they do not create or manage multiple revisions of the same file. Only object versioning stores multiple versions (revisions) of a document as it changes.

Memory tip: Think of it as two separate needs requiring two separate native GCS features - Revisions → Versioning, Cost tiering → Lifecycle conditions. Whenever an answer swaps either of these for a Cloud Function, it's adding unnecessary complexity and is almost certainly wrong on a Google Cloud exam.

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