▸case-01 Our Kubernetes cluster is experiencing high egress latency and intermittent packet loss between pods running in our Istio service mesh. I need a structured troubleshooting procedure with actionable diagnostic steps and verification checks to isolate whether the issue stems from proxy overhead, CNI issues, or MTU mismatches. | fail→fail | 30,891 | 30,991 | +0% | 1 | 1 | 0% | 5,528 | 5,715 | +3% | 0 | 0 | — |
▸case-02 We need to implement automated multi-region failover and mTLS encryption for our edge API gateways handling hybrid cloud traffic. Could you create an operational rollout guide that outlines the deployment sequence, required prerequisites, and post-implementation validation steps to confirm seamless failover during outages? | fail→fail | 33,505 | 23,723 | -29% | 1 | 1 | 0% | 5,558 | 4,704 | -15% | 0 | 0 | — |
▸case-03 We are designing an e-commerce platform and need a PostgreSQL relational schema for handling order management, line items, user accounts, and inventory tracking. Please write the complete CREATE TABLE statements with appropriate foreign keys, indexes, and constraints for database normalization. | pass→pass | 28,170 | 25,915 | -8% | 1 | 1 | 0% | 6,517 | 6,354 | -3% | 0 | 0 | — |
▸case-04 We are building a user profile dashboard in React 18 using Tailwind CSS. Please provide a React component that renders a user card showing avatar, display name, bio, and an editable status toggle state using standard React hooks. | pass→pass | 26,050 | 13,034 | -50% | 1 | 1 | 0% | 5,656 | 3,470 | -39% | 0 | 0 | — |
▸case-05 We have a Pandas DataFrame containing raw sales transaction data with timestamps, item IDs, unit prices, and quantities sold. Please write a Python script that aggregates monthly sales volume, calculates rolling 7-day averages, and outputs a summary CSV file. | pass→pass | 15,064 | 13,656 | -9% | 1 | 1 | 0% | 3,064 | 3,261 | +6% | 0 | 0 | — |
▸case-06 We are configuring dual AWS Direct Connect connections across two locations for high availability. We want location A to handle primary inbound traffic from our corporate network and location B to act as backup. A junior engineer suggested using BGP local preference on our customer gateway router to control this inbound path. Provide an architectural recommendation explaining the correct BGP attribute to influence inbound traffic from AWS. | fail→fail | 17,934 | 16,559 | -8% | 1 | 1 | 0% | 3,234 | 3,651 | +13% | 0 | 0 | — |
▸case-07 Our Kubernetes cluster runs on AWS EC2 with Cilium CNI in VXLAN mode. Nodes communicate across a VPC configured with 9000-byte Jumbo frames, but pods experience silent TCP connection drops when transmitting large payloads. Provide a network configuration guide for calculating and setting the pod network interface MTU. | fail→fail | 21,732 | 21,472 | -1% | 1 | 1 | 0% | 3,861 | 4,439 | +15% | 0 | 0 | — |
▸case-08 We are updating our edge HAProxy load balancing cluster to satisfy PCI-DSS 4.0 requirements for transit encryption. Provide a configuration snippet for bind directives enforcing strong modern TLS ciphers while disabling weak protocols. | fail→fail | 17,027 | 14,828 | -13% | 1 | 1 | 0% | 3,262 | 3,441 | +5% | 0 | 0 | — |
▸case-09 We need internal AWS EC2 instances to resolve api.internal.company.com to 10.0.1.50, while external internet clients resolving api.company.com reach our public ALB at 203.0.113.10. An engineer suggested creating a public DNS record for api.internal.company.com pointing to 10.0.1.50. Provide the recommended split-horizon DNS architecture using Route 53. | fail→pass | 14,982 | 14,332 | -4% | 1 | 1 | 0% | 2,934 | 3,346 | +14% | 0 | 0 | — |
▸case-10 We are migrating 500 remote developers from legacy CISCO IPsec VPN to a modern Zero Trust Network Access model with micro-segmentation and short-lived credentials. Provide a high-level network migration sequence and validation steps for implementing this transition. | fail→fail | 22,266 | 18,666 | -16% | 1 | 1 | 0% | 3,478 | 3,561 | +2% | 0 | 0 | — |
▸case-11 Our cross-region database replication between US-East and EU-West experiences throughput bottlenecks over a 10Gbps dedicated cloud interconnect with 80ms latency. The current kernel uses default CUBIC TCP congestion control. Provide Linux sysctl tuning parameter recommendations to optimize bulk TCP throughput. | pass→pass | 21,127 | 22,986 | +9% | 1 | 1 | 0% | 4,101 | 4,840 | +18% | 0 | 0 | — |
▸case-12 We need to roll out a canary deployment of our service 'orderservice' in Kubernetes, sending 90% of traffic to version v1 and 10% to version v2, with automated 503 error circuit breaking. Provide the traffic routing manifests required when using Istio. | fail→fail | 11,466 | 10,677 | -7% | 1 | 1 | 0% | 2,371 | 2,709 | +14% | 0 | 0 | — |
▸case-13 Our organization is scaling from 5 AWS VPCs to over 60 VPCs across multiple AWS accounts. A team lead suggested creating VPC peering connections between every pair of VPCs. Provide a network architecture assessment and recommended alternative topology for centralizing inter-VPC and on-premise routing. | fail→fail | 24,602 | 24,537 | -0% | 1 | 1 | 0% | 4,259 | 4,733 | +11% | 0 | 0 | — |
▸case-14 We are experiencing intermittent connection resets (TCP RST) between our cloud application instances and an external third-party API. The application logs only record generic 'Connection reset by peer' errors. Provide an observability strategy using network telemetry tools to capture and diagnose packet-level TCP flags. | fail→fail | 22,085 | 36,790 | +67% | 1 | 1 | 0% | 3,482 | 6,836 | +96% | 0 | 0 | — |
▸case-15 Our edge load balancer nodes are dropping inbound UDP flood packets using standard iptables rules, but softirq CPU usage reaches 100% on high packet rates. Provide an architectural recommendation for Kernel-level packet dropping before SKB buffer allocation. | fail→fail | 20,120 | 24,611 | +22% | 1 | 1 | 0% | 3,427 | 4,266 | +24% | 0 | 0 | — |
▸case-16 We need to issue automated TLS certificates for *.internal.dev.company.com inside a private Kubernetes cluster with no inbound internet exposure. An engineer suggested using cert-manager with HTTP-01 challenge. Provide the correct ACME challenge method and implementation approach. | fail→fail | 14,150 | 22,114 | +56% | 1 | 1 | 0% | 2,701 | 3,879 | +44% | 0 | 0 | — |
▸case-17 We are designing a multi-tenant enterprise data center network across 100 leaf switches. We need Layer 2 adjacency between workloads across different racks without risking STP loops or broadcast storms. Provide the modern protocol standard combination for control plane learning and data plane encapsulation. | fail→pass | 13,608 | 13,364 | -2% | 1 | 1 | 0% | 2,345 | 2,616 | +12% | 0 | 0 | — |
▸case-18 Our mobile web app experiences severe page load delays on lossy cellular networks due to packet loss blocking parallel asset streams on a single TCP connection. Provide a protocol upgrade strategy to eliminate TCP head-of-line blocking at the transport layer. | pass→pass | 20,639 | 16,911 | -18% | 1 | 1 | 0% | 3,441 | 3,280 | -5% | 0 | 0 | — |
▸case-19 We are preparing our cloud architecture for PCI-DSS 4.0 assessment. Our payment processing service runs in the same Kubernetes namespace as public marketing web apps. Provide a network security architecture plan to achieve compliant network segmentation for the Cardholder Data Environment (CDE). | fail→fail | 24,837 | 30,629 | +23% | 1 | 1 | 0% | 4,094 | 4,960 | +21% | 0 | 0 | — |
▸case-20 We are configuring Route 53 health-checked DNS failover between primary region US-East-1 and secondary region US-West-2. What DNS record TTL and health check threshold configuration strategy ensures rapid client failover within 60 seconds without false positive triggers? | fail→fail | 19,314 | 23,552 | +22% | 1 | 1 | 0% | 3,181 | 4,607 | +45% | 0 | 0 | — |
▸case-21 Our e-commerce portal is suffering credential stuffing attacks on /api/login. An engineer implemented an IP-based rate limit of 10 requests per minute per IP address on Cloudflare, but corporate office clients and mobile users are getting false-positive rate limit blocks. Provide a refined rate limiting key strategy. | fail→pass | 17,345 | 21,255 | +23% | 1 | 1 | 0% | 2,902 | 4,405 | +52% | 0 | 0 | — |
▸case-22 We are deploying HAProxy to balance traffic across a cluster of MySQL database nodes processing 50,000 queries per second. Provide the frontend/backend mode configuration and health check approach to achieve maximum throughput with minimal CPU overhead. | pass→pass | 22,947 | 21,927 | -4% | 1 | 1 | 0% | 3,911 | 4,320 | +10% | 0 | 0 | — |
▸case-23 We are building a reusable Terraform module for provisioning standardized cloud VPCs across 20 distinct environment accounts. Provide dynamic CIDR subnet allocation practices in Terraform code to prevent IP overlap across peered networks. | fail→fail | 40,009 | 26,687 | -33% | 1 | 1 | 0% | 8,228 | 5,529 | -33% | 0 | 0 | — |
▸case-24 We operate an internal enterprise network with 200 core routers within AS 65000 running internal BGP (iBGP). The network suffers from session maintenance overhead due to full-mesh requirements. Provide the network architecture design pattern to scale iBGP without full-mesh peering. | fail→pass | 19,317 | 24,243 | +26% | 1 | 1 | 0% | 3,310 | 4,867 | +47% | 0 | 0 | — |