CI/CD Pipeline Concepts and Workflow Questions
Conceptual understanding of how CI/CD pipelines work: continuous integration (running tests automatically on code commits), continuous deployment/delivery (automatically deploying to environments), pipeline stages (build, test, deploy), and tools that orchestrate these processes. Understand the benefits of CI/CD: faster feedback, reduced manual errors, faster release cycles.
EasyTechnical
74 practiced
As a Test Automation Engineer, describe where the following test types should execute in a CI/CD pipeline for a typical web application: unit tests, component tests, integration tests, UI/Selenium tests, and performance tests. For each test type explain trade-offs between speed and confidence and suggest gating strategies (which tests should block merges and which should run later).
EasyTechnical
71 practiced
Explain the role of artifact repositories (e.g., JFrog Artifactory, Nexus) in CI/CD pipelines with respect to test automation. What artifacts should be published by builds (binaries, docker images, test reports), how should they be versioned, and how do artifacts support reproducible test runs and safe rollbacks?
HardTechnical
93 practiced
Propose automated methods to detect flaky tests at scale. Include what data to collect (per-test pass/fail history, run-time variance, environment metadata, runner type), statistical techniques or heuristics to flag flakiness (e.g., variance thresholds, burst-failure detection), and approaches to reduce false positives. Discuss trade-offs between simple heuristics and ML-based models.
HardTechnical
68 practiced
You inherit a cloud CI system with rapidly increasing costs. Propose a practical plan to cut costs while preserving developer velocity: autoscaling strategies, use of spot/preemptible runners, job consolidation, dependency and artifact caching, incremental test selection, scheduling heavy jobs off-peak, and artifact retention policies. Include measurement approach and risk mitigation for each change.
MediumTechnical
74 practiced
You are the Test Automation lead with limited engineering resources. How would you prioritize automation work across these areas: stabilizing flaky tests, reducing CI runtime, adding missing unit tests, and building end-to-end test coverage? Provide criteria for prioritization, a 90-day plan with milestones, stakeholders to involve, and metrics to evaluate success.
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