Google Cloud Platform (GCP) Interview Questions and Answers for 10 years experience

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100 GCP Interview Questions & Answers (10+ Years Experience)

  1. What are the key differences between Compute Engine and App Engine?

    • Answer: Compute Engine provides virtual machines (VMs) giving you complete control over the OS and environment. App Engine is a Platform as a Service (PaaS) where you deploy your application code, and Google manages the underlying infrastructure. Compute Engine offers greater flexibility and customization but requires more management overhead, while App Engine prioritizes ease of deployment and scaling but with less control.

  2. Explain the different types of Persistent Disk options in GCP.

    • Answer: GCP offers several Persistent Disk types: Standard Persistent Disk (HDD-based, cost-effective), SSD Persistent Disk (faster I/O), and Premium Persistent Disk (highest performance SSDs). Each offers different performance characteristics and pricing to suit various workloads. There are also options for different sizes and regional/zonal availability.

  3. Describe your experience with Kubernetes on Google Kubernetes Engine (GKE).

    • Answer: [This answer should be tailored to your experience. Include details on cluster creation, deployment strategies (e.g., rolling updates, blue/green), scaling, monitoring, networking (e.g., Ingress, Services), managing secrets, and troubleshooting. Mention specific tools used, like kubectl, Helm, and any monitoring solutions integrated with GKE.]

  4. How do you handle data backups and disaster recovery in GCP?

    • Answer: [Describe your strategies. This might include using snapshots for persistent disks, using Cloud SQL backups, using Cloud Storage for backups, and leveraging features like Cloud Disaster Recovery (CDR) or regional redundancy for high availability. Mention your experience with backup schedules, retention policies, and restoration procedures.]

  5. Explain your experience with Google Cloud Storage (GCS) and its different storage classes.

    • Answer: [Discuss your experience with various storage classes like Standard, Nearline, Coldline, and Archive, explaining their cost and retrieval times. Mention your experience with lifecycle management policies, access controls (IAM), and using GCS for various use cases such as backups, archiving, and serving static websites.]

  6. How do you secure your GCP resources?

    • Answer: [Describe your security best practices. This should include using IAM roles and policies for granular access control, enabling Cloud Identity and Access Management (IAM), using Virtual Private Cloud (VPC) networks and firewalls, regularly patching VMs, utilizing Cloud Security Command Center, implementing security monitoring and logging (Cloud Logging, Cloud Monitoring), and employing secrets management solutions like Secret Manager.]

  7. Explain Cloud SQL and its different database engine options.

    • Answer: Cloud SQL offers managed database instances for MySQL, PostgreSQL, SQL Server, and others. Explain the differences between these engines and when you'd choose one over another. Discuss high availability and replication options offered by Cloud SQL.

  8. Describe your experience with serverless computing using Cloud Functions.

    • Answer: [Detail your experience with designing, deploying, and managing Cloud Functions. Discuss trigger types, scaling, error handling, and monitoring. Mention specific use cases where you leveraged Cloud Functions.]

  9. How do you monitor and log your GCP resources?

    • Answer: [Discuss your use of Cloud Monitoring, Cloud Logging, and Cloud Trace. Explain how you use dashboards, alerts, and logs to track performance, identify issues, and troubleshoot problems. Mention any custom logging and monitoring solutions integrated.]

  10. What are the different networking options available in GCP?

    • Answer: VPC networks, subnets, firewalls, Cloud Interconnect, Cloud VPN, load balancing (internal and external), and Cloud DNS are all key networking components. Explain their functions and how they integrate with each other.

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