Cloud Digital Leader Why cloud technology is transforming business Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Setting up a VPC peering to a partner data center

  Why it's wrong here

  VPC peering connects two Virtual Private Cloud networks over Google's internal backbone, enabling private IP communication, but it is purely a networking construct. It provides no data replication, storage synchronization, or automated failover capabilities; the partner data center remains an independent environment. For disaster recovery, you would need to implement your own replication and orchestration across that peered connection, which is operationally complex and still depends on the partner's infrastructure availability.

• ✗

  Using managed instance groups in the same region

  Why it's wrong here

  Managed instance groups (MIGs) in the same region provide high availability by automatically restarting or reselecting instances, and they can be placed in multiple zones for zonal fault tolerance. However, they do not protect against a regional outage—if the entire region becomes unavailable, all instances in that region are impacted. Disaster recovery requires a geographically separated replica in another region to ensure continuity from region-level failures, which a single-region MIG cannot provide.

• ✗

  Using tape backup stored offsite

  Why it's wrong here

  Tape backups stored offsite satisfy the basic need for durable, offline copies, but they introduce significant recovery time objectives (RTOs) because tapes must be physically retrieved, shipped, and loaded before restoration. The process is manual, slow, and prone to environmental damage or loss during transit. In contrast, cloud-native replication offers automated, near-instant replication across regions without physical logistics, making tape backups impractical for a modern DR strategy.

• ✓

  Creating a replica in another Cloud Region using Cloud Storage and Cloud SQL replicas

  Why this is correct

  Creating a replica in another Cloud Region using Cloud Storage and Cloud SQL replicas is the correct DR approach because it uses fully managed, native cross-region replication. Cloud Storage regional buckets can be replicated to another region via Object Lifecycle Management or by using dual-region buckets, while Cloud SQL provides built-in cross-region read replicas with automated failover. This solution minimizes RTO/RPO by continuously copying data and enabling promotes to primary during a regional outage, all without manual intervention or upfront infrastructure costs.

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