Screening
Recruiter and technical screening answers.
Interview practice
Choose a workspace, then narrow the catalog by role, topic, or company.
- 2,029
- matches
Workspace
Algo
Algorithms with executable tests.
Platform
Production-shaped multi-file tasks.
SQL case
Real schemas, queries and results.
Platform
Draft autosave without stale confirmations
angular · Medium · autosave state machine An editor saves drafts in the background. A slow confirmation for an older revision currently marks the latest text as saved, and an older failure can replace the current status.
Autosave State MachineAsync StateRace Conditions
MediumFrontend · Angular
Platform
Facet state without impossible selections
angular · Easy · derived filter state A catalog screen receives available facet values after every search. The current state boundary keeps selections that no longer exist, so the UI announces filters that cannot affect the visible result.
Derived Filter StateState ManagementComponent Testing
EasyFrontend · Angular
Platform
Optimistic reorder journal
angular · Hard · optimistic reconciliation A board supports several rapid card moves. When one request fails, the current implementation restores the entire old board and erases later confirmed moves.
Optimistic ReconciliationOptimistic UpdatesConcurrency
HardFrontend · Angular
Platform
Paged search request ownership
angular · Medium · request ownership A search screen can request several pages for one query while the user changes the query. Late pages from the previous search currently append to the new result set.
Request OwnershipAsync StateRace Conditions
MediumFrontend · Angular
Platform
Shared query cache subscriptions
angular · Hard · cache lifecycle Several panels subscribe to the same query. The current cache aborts the shared request when any panel unmounts and commits a late response after the final subscriber has gone.
Cache LifecycleOptimistic UpdatesConcurrency
HardFrontend · Angular
Platform
Stable sort and screen-reader summary
angular · Easy · accessible sorting A results table can be sorted by score or name. Equal values currently jump between renders and the live region summary describes the requested direction rather than the order actually applied.
Accessible SortingState ManagementComponent Testing
EasyFrontend · Angular
Platform
End-to-end facet contract
express + react · Easy · form contract A browser and API disagree at the end to end facet contract boundary. A catalog screen receives available facet values after every search. The current state boundary keeps selections that no longer exist, so the UI announ
Form ContractAPI IntegrationResponse Mapping
EasyFull Stack · Fullstack Backend Focus
Platform
Optimistic workflow journal
express + react · Hard · offline sync A browser and API disagree at the optimistic workflow journal boundary. A board supports several rapid card moves. When one request fails, the current implementation restores the entire old board and erases later confirmed
Offline SyncCross Layer ConsistencyIdempotency
HardFull Stack · Fullstack Backend Focus
Platform
Paged flow request ownership
express + react · Medium · request ownership A browser and API disagree at the paged flow request ownership boundary. A search screen can request several pages for one query while the user changes the query. Late pages from the previous search currently append
Request OwnershipAsync StateAPI Integration
MediumFull Stack · Fullstack Backend Focus
Platform
Revision-safe autosave API
express + react · Medium · autosave state machine A browser and API disagree at the revision safe autosave api boundary. An editor saves drafts in the background. A slow confirmation for an older revision currently marks the latest text as saved, and an older
Autosave State MachineAsync StateAPI Integration
MediumFull Stack · Fullstack Backend Focus
Platform
Shared query lifecycle
express + react · Hard · cache lifecycle A browser and API disagree at the shared query lifecycle boundary. Several panels subscribe to the same query. The current cache aborts the shared request when any panel unmounts and commits a late response after the fi
Cache LifecycleCross Layer ConsistencyIdempotency
HardFull Stack · Fullstack Backend Focus
Platform
Stable cross-layer ordering
express + react · Easy · response projection A browser and API disagree at the stable cross layer ordering boundary. A results table can be sorted by score or name. Equal values currently jump between renders and the live region summary describes the requested
Response ProjectionAPI IntegrationResponse Mapping
EasyFull Stack · Fullstack Backend Focus
Platform
End-to-end facet contract
vue + fastify · Easy · form contract A browser and API disagree at the end to end facet contract boundary. A catalog screen receives available facet values after every search. The current state boundary keeps selections that no longer exist, so the UI announce
Form ContractAPI IntegrationResponse Mapping
EasyFull Stack · Fullstack Balanced
Platform
Optimistic workflow journal
vue + fastify · Hard · offline sync A browser and API disagree at the optimistic workflow journal boundary. A board supports several rapid card moves. When one request fails, the current implementation restores the entire old board and erases later confirmed m
Offline SyncCross Layer ConsistencyIdempotency
HardFull Stack · Fullstack Balanced
Platform
Paged flow request ownership
vue + fastify · Medium · request ownership A browser and API disagree at the paged flow request ownership boundary. A search screen can request several pages for one query while the user changes the query. Late pages from the previous search currently append t
Request OwnershipAsync StateAPI Integration
MediumFull Stack · Fullstack Balanced
Platform
Revision-safe autosave API
vue + fastify · Medium · autosave state machine A browser and API disagree at the revision safe autosave api boundary. An editor saves drafts in the background. A slow confirmation for an older revision currently marks the latest text as saved, and an older fa
Autosave State MachineAsync StateAPI Integration
MediumFull Stack · Fullstack Balanced
Platform
Shared query lifecycle
vue + fastify · Hard · cache lifecycle A browser and API disagree at the shared query lifecycle boundary. Several panels subscribe to the same query. The current cache aborts the shared request when any panel unmounts and commits a late response after the fina
Cache LifecycleCross Layer ConsistencyIdempotency
HardFull Stack · Fullstack Balanced
Platform
Stable cross-layer ordering
vue + fastify · Easy · response projection A browser and API disagree at the stable cross layer ordering boundary. A results table can be sorted by score or name. Equal values currently jump between renders and the live region summary describes the requested d
Response ProjectionAPI IntegrationResponse Mapping
EasyFull Stack · Fullstack Balanced