Technical Skills

Engineering Fundamentals Test

Assess core computer science and engineering concepts across systems, software and technical problem-solving.

45 minMedium15 questions15 sections
Computer science fundamentalsEngineering conceptsTechnical reasoningSystems knowledge
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Topics covered

LatencyRetriesNetworkingDatabaseCachingQueuesDeploymentsSecurityData IntegrityMessagingCapacityObservabilityRecoveryPostmortemsTroubleshooting

Sample questions

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LatencyMid-level

Average API latency is unchanged at 180 ms, but users report intermittent slowness. The p99 increased from 900 ms to 8 seconds. Explain what this tells you and how you would investigate.

RetriesMid-level

A dependency starts returning 503. Every application instance retries immediately three times, increasing dependency traffic until it fails completely. Explain the failure and redesign the retry policy.

NetworkingMid-level

Only one application region cannot connect to api.example.com. IP-based curl works, hostname-based requests fail, and other regions are healthy. Describe the investigation.

DatabaseMid-level

A service reports database timeouts although database CPU is 25%. Active connections are at the limit and many requests wait for a connection. Explain likely causes and next steps.

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