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Kubernetes troubleshooting: 8 interview questions | InfraThrone DevOps Park

Interview Bank/Question drills/Kubernetes

K8S

KubernetesDRILL

Kubernetes troubleshooting

The production incidents interviewers love: crash loops, Pending pods, 503s, OOMs and noisy deploys.

8 questions3 free

Q1–Q3 are free. Unlock the other 5 model answers, and every other drill.

Q1A pod is stuck in CrashLoopBackOff right after a deploy. Walk me through how you debug it.RazorpaySwiggyGoogleFree
Q2A new pod has been Pending for 20 minutes. What are the possible reasons, and how do you narrow it down?FlipkartSwiggyFree
Q3All pods are Running, but the Service returns 503. How do you find the break?AtlassianPostmanFree
Q4Pods get OOMKilled during traffic spikes. How do you fix it without just doubling the memory limit?PhonePeFlipkartAmazonLocked
Q5Every rolling deploy causes a burst of 502s. Why, and how do you make deploys invisible to users?RazorpayAtlassianLocked
Q6A node goes NotReady at 3 a.m. What do you check, and in what order?MicrosoftFreshworksLocked
Q7The HPA isn't scaling up even though the service is clearly overloaded. Why?SwiggyLocked
Q8Design a zero-downtime upgrade of a production cluster from 1.28 to 1.30.AmazonAtlassianGoogleLocked

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