11Walk me through everything that happens between kubectl apply and a running pod.▼medium★ EssentialGoogleMetaRed Hat2 notes & commentsunlockedThe single most common Kubernetes interview question, and the one where a vague answer is most obvious. Every stage you name is a place the interviewer can ask you to debug.Open full answer →
18How does a pod get an IP address, and what happens to traffic between two pods on different nodes?▼hardCloudflareGoogleRed Hat2 notes & commentsunlockedTrace sandbox setup, address allocation and a cross-node packet, then distinguish pod reachability from Service translation.Open full answer →
23Why did eBPF-based networking displace iptables in Kubernetes, and what does that change for you?▼hard★ EssentialCloudflareUberDatadog2 notes & comments○ sign inCompare the configured Service datapaths and their lookup and update mechanisms. The iptables datapath degrades with service count, and eBPF replaces a linear scan with a map lookup.Open full answer →
24Same-node pod calls work, cross-node calls time out, and small probes pass while real requests hang. Find the break.▼hard★ EssentialAmazon & AWSFlipkartUber○ sign inSame-node good, cross-node bad is not a random clue, it is nearly a diagnosis. One short decision tree separates overlay reachability, encapsulation blocks, MTU and policy.Open full answer →
