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Aporeon

Technical interview practice, from one developer to another.

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Full-Stack Product Features

Mutations & Workflows

Optimistic UI, duplicate prevention, uploads, admin CRUD, auth-aware UI, concurrency, and flags.

6 drillsPractice one at a timeOrdered pathConcept question

Recommended start

Optimistic UI

Explains when optimistic UI is worth it, when to wait for server confirmation, and how to recover from rejected mutations.

Medium~7 minStep 1 of 6

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6 of 6 shown

1Optimistic UIRecommended startExplains when optimistic UI is worth it, when to wait for server confirmation, and how to recover from rejected mutations.Concept questionMedium~7 min.NETASP.NET CoreNext.jsPractice 2Double Submit PreventionExplains frontend guards, backend idempotency, pending state, retries, and duplicate-safe mutation design.Concept questionMedium~7 min.NETASP.NET CoreNext.jsPractice 3File Upload FlowExplains upload UX, API boundaries, validation, progress, storage, scanning, failure handling, and safe download behavior.Concept questionHard~9 min.NETASP.NET CoreNext.jsPractice 4Admin CRUD WorkflowExplains admin list/edit/delete workflows with capability checks, audit events, confirmation, validation, and recovery.Concept questionHard~9 min.NETASP.NET CoreNext.jsPractice 5Auth-Aware UIExplains permission-aware navigation, guarded routes, server authorization, stale capabilities, and safe 401/403 handling.Concept questionMedium~7 min.NETASP.NET CoreNext.jsPractice 6Stale Form ConflictsExplains stale edit detection, row versioning, conflict UI, refresh behavior, and safe update contracts.Concept questionHard~9 min.NETASP.NET CoreNext.jsPractice

Practice order

6 drillsOne at a time

1Optimistic UIUp next / Medium / ~7 min
2Double Submit PreventionMedium / ~7 min
3File Upload FlowHard / ~9 min
4Admin CRUD WorkflowHard / ~9 min
5Auth-Aware UIMedium / ~7 min
6Stale Form ConflictsHard / ~9 min