Reliability design principles in GCP - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Fault Tolerance in Cloud Systems

Which of the following best describes fault tolerance in a cloud infrastructure?

A The practice of scaling resources up or down based on demand.

B The ability of a system to continue operating properly in the event of the failure of some of its components.

C The process of backing up data to a remote location for disaster recovery.

D The method of encrypting data to prevent unauthorized access.

💡 Hint

Think about what it means for a system to keep working even if parts fail.

Fault tolerance means the system keeps working even when some parts fail, ensuring reliability.

❓ Architecture

intermediate

Designing for High Availability

You want to design a web application on GCP that remains available even if one zone goes down. Which architecture choice supports this?

A Deploy the application across multiple zones within the same region with load balancing.

B Deploy the application in a single zone with autoscaling enabled.

C Deploy the application in one zone and back up data daily to Cloud Storage.

D Deploy the application in multiple regions but without load balancing.

💡 Hint

Think about spreading resources to avoid a single point of failure.

Deploying across multiple zones with load balancing ensures the app stays available if one zone fails.

❓ security

advanced

Impact of Misconfigured IAM on Reliability

What is the most likely reliability impact if Identity and Access Management (IAM) roles are misconfigured in a GCP project?

A Network latency will increase due to routing errors.

B Data will automatically be encrypted, improving security.

C The system will scale resources incorrectly, causing performance issues.

D Users may lose access to critical services, causing downtime.

💡 Hint

Consider what happens if users or services cannot access what they need.

Misconfigured IAM can block access to services, causing outages and reducing reliability.

❓ service_behavior

advanced

Effect of Autohealing on Compute Engine Instances

What happens when a Compute Engine instance group with autohealing enabled detects an unhealthy instance?

A The unhealthy instance is automatically deleted and replaced with a new healthy instance.

B The instance group scales down to reduce costs but does not replace the instance.

C The unhealthy instance is rebooted but not replaced automatically.

D The instance group sends an alert but takes no automatic action.

💡 Hint

Think about how autohealing helps maintain service availability.

Autohealing replaces unhealthy instances automatically to keep the service running smoothly.

✅ Best Practice

expert

Choosing the Best Backup Strategy for Reliability

You manage a critical database on GCP that must be recoverable within minutes after failure. Which backup strategy best supports this reliability requirement?

A Take weekly snapshots and store them in a different region for disaster recovery.

B Export data monthly to BigQuery for analytics and archive.

C Use continuous replication with Cloud SQL high availability and automated failover.

D Perform daily full backups stored in Cloud Storage with manual restore processes.

💡 Hint

Consider backup methods that minimize downtime and data loss.

Continuous replication with high availability and automated failover allows quick recovery and minimal downtime.