Quarantine flaky tests immediately and investigate root causes. A test suite with ignored failures trains the team to ignore real failures too.
Look for: root cause analysis (timing issues, test dependencies, environment instability, shared state), strategies (explicit waits over implicit, test isolation, deterministic test data, retry with investigation), quarantine processes, and metrics tracking flake rate. Best candidates treat flaky tests as bugs, not acceptable noise.
Practical automation challenge. Candidates who accept flaky tests as normal have not managed large test suites. The best QA engineers relentlessly pursue test reliability.