Systematic Troubleshooting and Debugging Questions
Covers structured methods for diagnosing and resolving software defects and technical problems at the code and system level. Candidates should demonstrate methodical debugging practices such as reading and reasoning about code, tracing execution paths, reproducing issues, collecting and interpreting logs metrics and error messages, forming and testing hypotheses, and iterating toward root cause. Topic includes use of diagnostic tools and commands, isolation strategies, instrumentation and logging best practices, regression testing and validation, trade offs between quick fixes and long term robust solutions, rollback and safe testing approaches, and clear documentation of investigative steps and outcomes.
HardSystem Design
0 practiced
Design a chaos engineering / fault-injection framework to proactively surface reliability issues before customer impact. Describe types of failures to inject (network partitions, disk full, DNS outages, high CPU), scoping and scheduling of experiments, safety gates, observability integrations, rollback controls, and how you would ensure results feed back into prioritization and troubleshooting playbooks.
EasyTechnical
0 practiced
What defines a flaky test in CI, why are flaky tests dangerous for reliable debugging, and what practical steps would you take as a Solutions Architect to detect, triage, and reduce flaky tests in a large automated test suite used by your clients?
HardTechnical
0 practiced
Production shows increased TLS handshake failures after introducing a new reverse proxy. As a Solutions Architect, list diagnostic steps to determine whether the cause is expired certificates, SNI mismatches, incompatible cipher suites, stale session tickets, client certificate issues, or proxy misconfiguration. Include commands and telemetry you would collect (e.g., openssl s_client, proxy logs, server TLS logs).
HardTechnical
0 practiced
A third-party vendor native library used by a critical service is suspected to leak memory, but you cannot modify vendor code. Propose mitigation and debugging strategies: process isolation patterns, periodic restarts, sidecar isolation, wrapping/instrumentation layers, resource limits, and how to gather reproducible evidence to engage the vendor support effectively.
MediumSystem Design
0 practiced
Design a regression test automation pipeline for a client that: (1) validates pull requests quickly, (2) runs targeted integration tests for changed services, (3) executes broader suites in staging, and (4) gates production deploys. Describe triggers, selective test selection, parallelization, artifact promotion, traceability between tests and releases, and automated rollback hooks.
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