Top 50 performance optimization Interview Questions
The most frequently asked performance optimization questions across all roles and companies, ranked by real interview frequency. Updated daily.
Transpose a strided matrix with cache-aware tiling while tracking source cache-line transitions.
AMDProcess a timestamped Box event stream and detect users accessing enough distinct files within a rolling window.
BoxImplement a TTL-aware LRU cache for Hive Moderation predictions with constant-time average lookups and bounded memory.
Hive (CA)Compute each trailing window's maximum Squarespace Analytics traffic using a monotonic deque in linear time.
SquarespaceSelect up to k telemetry poll times greedily by urgency while enforcing a cooldown gap to reduce battery-heavy network requests.
WaymoIdentify missing, unexpected, duplicate, and inconsistent derived records using PostgreSQL validation queries.
Count unique normalized KPIT portal emails using PostgreSQL string functions and COUNT(DISTINCT).
Kaiser Permanente
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Assesses your approach to streaming data, scheduling, and UI responsiveness.
Balyasny Asset ManagementTests real-time system design, throughput, and latency trade-offs for high-volume data pipelines.
FreeformDiagnose high CPU and latency in a cloud system using observability, OS, network, and security investigation techniques.
Salesforce