Interview questions
Find a company or topic. Read the sources, then practice.
Loading the question library…
Find a company or topic. Read the sources, then practice.
Loading the question library…
Showing 1,401–1,425
A large catalog combines product variants, concurrent merchant edits, fast reads, and reliable change propagation.
General practice
bulk-imports · catalog-reads · change-propagation · consistency
Journeys across buses, trains, and walks must remain feasible as delays, cancellations, and access restrictions change.
General practice
journey-feasibility · schedule-changes-during-searches · service-disruptions · stop-access
Durable event delivery with independent subscription progress, acknowledgment recovery, and limits for slow subscriptions.
General practice
acknowledgments · durable-delivery · independent-subscriptions · publish-subscribe
Permission-aware enterprise search and generation: keeping indexed pages current, finding useful evidence, and answering without leaking restricted content.
Companies: Teradata
retrieval-augmented-generation · access-control · incremental-indexing · hybrid-search
An auction service with strict deadlines, many bidder calls, partial failures, and durable outcomes.
General practice
auction-rules · bidder-interactions · deadline-management · durable-storage
Game sessions with fast state updates, trusted outcomes, fair hit decisions, and safe reconnects.
General practice
disconnects · fairness · game-sessions · latency
Global latest-value streaming: source ordering, hot-symbol fanout, conflation, and reconnecting through lagging regions without rolling prices backward.
Companies: Amazon, Bloomberg, Google
backpressure · fanout · ordering · pub-sub
Patient vital signs: delayed readings, uncertain device clocks, clinical rules, and urgent alerts that require clinician acknowledgment.
General practice
clinical-alerts · delayed-readings · device-identity · health-data-privacy
Location-based discovery with ranked search, reliable review updates, and ratings that stay correct across edits and deletions.
General practice
caching · data-consistency · geospatial-search · pagination
Copy warehouse results into operational tools. Detect changes, respect shared destination limits, and restore current values after partial or uncertain writes.
General practice
durable-workflows · external-apis · idempotency · incremental-sync
Fast road routes across a continent, with legal turns, useful alternatives, and frequent changes in road conditions.
General practice
alternative-routes · continental-scale-routing · graph-algorithms · query-serving-capacity
Millions of persistent connections require safe session ownership, ordered recovery, and bounded memory during slow clients and connection bursts.
General practice
backpressure · capacity-planning · connection-ownership · event-routing
Event contracts across application versions: compatibility rules, concurrent updates, and schema access during registry failures.
General practice
compatibility · concurrency-control · immutable-data · schema-access-during-outages
Live screen delivery with readable text, low delay, and different network limits for each viewer.
General practice
access-control · bandwidth-adaptation · browser-media-transport · media-fanout
The engine balances fast document visibility, ranked results, and complete searches during shard failures.
General practice
distributed-query-execution · document-lookup · durability-and-availability · full-text-search
Security response workflows: duplicate alerts, uncertain action outcomes, human approvals, tenant isolation, and reliable audit records.
General practice
approval-gates · audit-logs · external-integrations · idempotency
An endpoint registry must track instance health, deliver client updates, and limit stale data during failures.
General practice
client-freshness · client-update-delivery · failure-detection · instance-identity
The fleet must apply identity and route changes without a control dependency or excess latency on service calls.
General practice
configuration-distribution · control-plane · latency-budgets · mutual-tls
Carrier updates can repeat or arrive late. The service must preserve shipment history and determine current status despite incomplete carrier data.
General practice
carrier-integration · data-ingestion · event-deduplication · event-ordering
Persistent carts across devices: concurrent edits, guest cart merges, and changes in product availability.
General practice
cart-ownership · concurrent-cart-edits · guest-cart-merges · lost-responses-and-repeated-requests
Control of connected devices: uncertain command results, late state reports, rule loops, and secure access to homes.
General practice
command-delivery · device-connectivity · device-security · event-ordering
Frequent relationship changes, users with many connections, and graph queries with strict cost and freshness limits.
General practice
consistency · high-degree-users · mutual-connections · neighborhood-query-cost
Creator reports require distinct viewer counts, correct event totals, and corrections for late or duplicate events.
General practice
audience-statistics · distinct-viewer-counts · fresh-report-updates · historical-report-correction
Deployment security checks: artifact identity, trusted evidence, dependency rules, policy changes, and safe behavior during failures.
General practice
artifact-identity · artifact-signatures · build-provenance · deployment-check-latency
Brokerage order flow: reserve cash and shares, handle uncertain execution outcomes, maintain a correct ledger, and fan out live prices.
General practice
fanout · financial-ledger · idempotency · market-data