Custom Solution Development Questions

Focuses on designing and delivering bespoke technical solutions to meet specific customer or project requirements. Candidates should explain how they gather requirements, translate needs into technical designs, build prototypes, iterate with stakeholders, validate solutions, and deliver production quality implementations. Discussions may include architectural decision making, trade off analysis, integration with existing systems, customization of third party software, testing strategies, documentation, and how to measure success and maintainability. Provide examples of complex customizations, how constraints were managed, and how technical and non technical stakeholder feedback was incorporated.

MediumTechnical

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How would you configure Role-Based Access Control (RBAC) in a Kubernetes cluster to support multiple tenant teams safely? Cover namespace strategy, roles vs rolebindings, service account usage, and preventing privilege escalation and kube-system access.

MediumTechnical

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Provide an example Azure DevOps YAML snippet (high level) that implements blue/green deployment to AKS with health gating and traffic shift. Describe the necessary pipeline variables, deployment job sequence, and how you would validate before switching traffic fully.

HardTechnical

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Design an architecture ensuring exactly-once end-to-end processing for financial transactions across microservices and external payment processors. Discuss middleware choices, idempotency tokens, outbox pattern, distributed transactions (or lack thereof), reconciliation, and recovery from partial failures.

HardTechnical

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You inherit a custom solution with poor documentation, flaky deployments, and frequent outages. Provide a prioritized remediation plan with short-term quick wins (bring system to known-good), medium-term stabilizations (introduce CI/CD, monitoring), and long-term improvements (refactoring, documentation, runbooks). Include how you'd communicate the plan to leadership.

HardTechnical

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A vendor's product needs to remain upgradeable while allowing your customer to apply heavy customizations. Propose an extensibility architecture (plugin model, adapter layer, event-driven extensions), specify how to manage compatibility across major versions, and outline tests and CI practices to validate upgrades.

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