▸case-03 A company is migrating 50 TB of daily streaming data from an on-premises data center to Google Cloud Platform. The network team wants to save upfront setup time by just creating multiple redundant IPsec VPN tunnels over the public internet. What dedicated network interconnect strategy should be recommended for high bandwidth, low latency, and enterprise SLA performance? | pass→pass | 12,548 | 12,712 | +1% | 1 | 1 | 0% | 2,303 | 2,458 | +7% | 0 | 0 | — |
▸case-04 An organization is establishing an Azure footprint with 30 distinct application workloads across multiple departments. The security team wants each application team to independently configure public IP addresses and express route connections in their own isolated subscriptions. How should Azure networking be structured to enforce centralized security policies and shared routing? | pass→pass | 15,677 | 15,723 | +0% | 1 | 1 | 0% | 2,639 | 2,936 | +11% | 0 | 0 | — |
▸case-01 We are designing a disaster recovery architecture on AWS for a mission-critical transactional database system. The business requires RTO < 10 minutes and RPO < 1 minute, but executives are reluctant to pay for a fully active-active multi-region deployment running double the compute instances 24/7. Which disaster recovery pattern balances near-zero data loss and quick failover without running full compute capacity in the secondary region continuously? | fail→pass | 10,039 | 15,790 | +57% | 1 | 1 | 0% | 2,044 | 2,847 | +39% | 0 | 0 | — |
▸case-02 An enterprise needs to archive historical healthcare records in Amazon S3 for compliance. The records are rarely accessed (once or twice a year), but when requested by an auditor, medical staff must be able to read the record within milliseconds. The team is tempted to use standard Glacier or Glacier Deep Archive to minimize storage cost. What storage class should be selected? | pass→pass | 6,688 | 9,176 | +37% | 1 | 1 | 0% | 1,180 | 1,635 | +39% | 0 | 0 | — |
▸case-05 A financial institution wants to migrate a 15-year-old COBOL mainframe core banking system to AWS within 3 months due to an expiring datacenter contract. A vendor suggested completely rewriting the monolithic application into serverless AWS Lambda microservices within this timeframe. What migration strategy classification is appropriate for this tight deadline? | pass→pass | 10,758 | 12,904 | +20% | 1 | 1 | 0% | 1,964 | 2,263 | +15% | 0 | 0 | — |
▸case-06 An e-commerce system runs containerized microservices on Amazon EKS. Traffic spikes unpredictably during flash sales, but base load is steady. The CFO wants to lock in 3-year All Upfront Reserved Instances for 100% of the peak capacity to get maximum discount percentage. How should compute purchasing options be structured to optimize cost without overprovisioning? | pass→pass | 15,721 | 18,667 | +19% | 1 | 1 | 0% | 2,768 | 3,318 | +20% | 0 | 0 | — |
▸case-07 A global SaaS platform on GCP needs a relational database that spans North America, Europe, and Asia. Applications in all regions must perform ACID transactions with strong consistency and synchronous global reads/writes. The team proposes using Cloud SQL for PostgreSQL with read replicas across regions. What GCP database product should be selected instead? | pass→pass | 6,550 | 7,707 | +18% | 1 | 1 | 0% | 1,234 | 1,251 | +1% | 0 | 0 | — |
▸case-08 An enterprise is migrating a 2 TB PostgreSQL database from on-premises to AWS Aurora PostgreSQL. The business allows a maximum of 15 minutes of downtime during cutover. The operations team plans to perform a single PG_DUMP and restore during the cutover window. What database migration mechanism should be implemented? | pass→pass | 10,355 | 11,877 | +15% | 1 | 1 | 0% | 1,855 | 2,293 | +24% | 0 | 0 | — |
▸case-09 An enterprise web application hosted on Azure App Services in East US and West Europe requires automatic global HTTP traffic routing and instant failover if one region suffers a total outage. The developer wants to use internal Azure Load Balancers in each region with manual DNS switching. Which Azure global traffic management service should be used? | pass→pass | 5,303 | 7,918 | +49% | 1 | 1 | 0% | 1,036 | 1,457 | +41% | 0 | 0 | — |
▸case-10 An organization needs to migrate 800 TB of uncompressed video files from an on-premises SAN to Amazon S3. The available network uplink is a shared 100 Mbps internet connection. The network engineer estimates uploading over the internet will take around 3 months. How should this bulk data transfer be architected? | pass→pass | 13,606 | 13,197 | -3% | 1 | 1 | 0% | 2,320 | 2,525 | +9% | 0 | 0 | — |
▸case-11 A startup is building a simple REST API and background queue worker system on GCP with low, sporadic invocation rates (a few hundred requests per day). The dev team wants to deploy a full Google Kubernetes Engine (GKE) cluster with 3 worker nodes to ensure enterprise scalability. How should this architecture be simplified for cost and maintenance? | pass→pass | 12,572 | 10,056 | -20% | 1 | 1 | 0% | 2,207 | 1,819 | -18% | 0 | 0 | — |
▸case-12 An organization on AWS has expanded to 45 separate VPCs that all require full mesh interconnectivity and access to shared services in a central VPC. The network engineer is creating 990 individual VPC peering connections. What architectural component should replace this mesh? | pass→pass | 4,658 | 6,249 | +34% | 1 | 1 | 0% | 845 | 1,176 | +39% | 0 | 0 | — |
▸case-13 A financial analytics platform on Azure generates terabytes of daily log data stored in Azure Blob Storage. Logs are queried frequently during the first 30 days, rarely for the next 60 days, and must be retained for 7 years for compliance without active querying. The ops team leaves all data in Hot tier permanently. What lifecycle management policy should be configured? | pass→pass | 10,024 | 11,208 | +12% | 1 | 1 | 0% | 1,881 | 2,382 | +27% | 0 | 0 | — |
▸case-14 During a cloud architecture review, an executive asks to set both Recovery Time Objective (RTO) and Recovery Point Objective (RPO) to exactly zero across all systems without increasing the cloud budget. How should a cloud architect address this expectation? | pass→pass | 13,392 | 20,457 | +53% | 1 | 1 | 0% | 2,393 | 2,881 | +20% | 0 | 0 | — |
▸case-15 A data team runs high-frequency analytical queries on a 50 TB Google BigQuery table. Data analysts continuously run `SELECT *` queries against the entire table without filters, causing high query processing costs. How should the BigQuery dataset and table structure be optimized? | fail→fail | 12,100 | 11,837 | -2% | 1 | 1 | 0% | 2,394 | 1,843 | -23% | 0 | 0 | — |
▸case-16 A team wants to run a 45-minute daily data processing job inside AWS Lambda by extending the execution timeout setting. If Lambda cannot run this, they plan to run an EC2 instance 24/7. What AWS serverless/container architecture should be recommended for this long-running task? | pass→pass | 10,541 | 10,374 | -2% | 1 | 1 | 0% | 1,817 | 2,002 | +10% | 0 | 0 | — |
▸case-17 An enterprise web application on Azure uses Azure SQL Database. The team requires automated failover to a secondary region with read-scale out capabilities in case the primary region experiences an outage. What Azure SQL feature provides this capability? | pass→pass | 4,160 | 6,036 | +45% | 1 | 1 | 0% | 701 | 1,224 | +75% | 0 | 0 | — |
▸case-18 A company manages 50 AWS accounts individually with local IAM users and manual credential rotation in each account. The security auditor flagged this as an extreme compliance risk. What AWS organizational governance architecture should be implemented? | pass→pass | 14,703 | 17,199 | +17% | 1 | 1 | 0% | 2,654 | 3,252 | +23% | 0 | 0 | — |
▸case-19 An enterprise requires a high-bandwidth (10 Gbps+), private, non-encrypted connection from their local datacenter directly to Google Cloud VPC with guaranteed bandwidth and no traversal over the public internet. What GCP network product meets this criteria? | pass→pass | 5,872 | 5,533 | -6% | 1 | 1 | 0% | 964 | 1,069 | +11% | 0 | 0 | — |
▸case-20 An online ticketing application hosted on AWS EC2 auto-scaling groups experiences sudden traffic surges when tickets go on sale. The auto-scaling policy is currently based on average CPU utilization, but CPU takes 5 minutes to rise while the application crashes from exhausted web worker threads within 1 minute. What scaling metric or strategy should replace CPU utilization? | pass→pass | 11,318 | 10,077 | -11% | 1 | 1 | 0% | 1,875 | 1,736 | -7% | 0 | 0 | — |
▸case-21 I'm getting a `TypeError: 'module' object is not callable` when decorating a route in my local Python Flask application script `app.py`: `@app.route('/api')`. Here is my script: `import flask; app = flask; @app.route('/')`. How do I fix this Python code error? | pass→fail | 6,116 | 5,364 | -12% | 1 | 1 | 0% | 1,145 | 1,195 | +4% | 0 | 0 | — |
▸case-22 On my local standalone Ubuntu 22.04 server, high network throughput is dropping packets. I need to edit `/etc/sysctl.conf` to increase `net.core.rmem_max` and `net.ipv4.tcp_rmem`. What exact sysctl command and values apply these settings immediately without rebooting? | pass→pass | 9,352 | 6,975 | -25% | 1 | 1 | 0% | 1,860 | 1,630 | -12% | 0 | 0 | — |
▸case-23 Write a Jenkinsfile declarative pipeline stage that logs into Docker Hub using credentials stored in Jenkins under ID 'docker-hub-creds' and builds a Docker image tagged `myrepo/myapp:latest` from the local directory. | pass→pass | 8,789 | 8,195 | -7% | 1 | 1 | 0% | 1,718 | 1,386 | -19% | 0 | 0 | — |