Site Reliability Engineer Interview Experience at LinkedIn – 2026

This initial HackerRank round mixes coding and scripting-flavored questions, including a log-parsing problem requiring extraction and counting of distinct error codes from a semi-structured server log, plus a straightforward FizzBuzz-style warm-up question before the harder problems.

This round covers core SRE operations knowledge rather than coding - specifically how SSH authentication works end to end (key exchange, session establishment), how to efficiently copy a single file from one server out to ten thousand servers without serializing the transfers one at a time, and how to design monitoring for a three-tier web architecture. For the file-distribution question, a strong approach proposes a tree-based fanout distribution model (each server that receives the file also distributes to a subset of others) rather than a single source server pushing to all ten thousand directly, since a single-source push would bottleneck badly at that scale.

This recursion-focused coding round includes a problem to compute all valid ways to partition a string into palindromic substrings, best solved with backtracking and memoization to avoid recomputing palindrome checks for the same substring repeatedly, plus a log-parsing follow-up to extract structured fields from unstructured log lines using a defined delimiter pattern.

This conversational round explores background and past projects in depth, followed by a live troubleshooting exercise: an Apache web server is returning a mix of 500 and 400 errors, to be diagnosed with terminal access. A methodical approach starts by checking the Apache error log for the specific error messages behind the 500s, finding a misconfigured upstream proxy directive causing intermittent failures, and separately tracing the 400s to malformed requests from a specific client pattern rather than a server-side issue - working through both symptoms independently rather than assuming a single root cause covers both.