Architecture
376 bites tagged Architecture — interview questions with model answers, and 60-second explainers.
How does Agile welcome changing requirements without chaos?
Whether you know that Agile embraces change only when supported by engineering discipline. Distinguish planned adaptability from reactive chaos by citing short feedback loops, evolutionary architecture, and continuous integration.
Contrast SvelteKit file-system routing with Vue/Angular router configs
Contrast SvelteKit directory routes with Vue/Angular config routers; filesystem routing removes boilerplate but couples URLs to folders and limits dynamic registration. Convention-over-configuration tradeoffs.
Differentiate client state from server state and their tools
This tests whether you recognize server state as async, remote, and cacheable versus local synchronous client state. A strong answer contrasts ownership and lifecycles, mapping Pinia to UI state and Vue Query to fetched data.
How would you architect a multi-step Svelte wizard with Stores?
Tests state isolation and validation orchestration across wizard steps. A solid answer uses a centralized store with step slices, derived validity stores, and pre-navigation guards. Red flag: unrelated per-step stores or validation only on final submit.
Why is DI central to Angular architecture versus Vue's module system?
Tests architectural grasp of inversion of control. Angular DI enables hierarchical injectors, tree-shakable providers, and runtime substitution without direct imports unlike Vue modules. Red flag: calling DI mere convenience or claiming Vue matches Angular DI.
Monolithic or multiple libraries for cross-platform design system?
This tests cross-platform design system architecture. Pick multiple interconnected libraries, centralize tokens in a shared primitive layer, and branch platform components downstream. Red flag: one monolithic file ignoring native rendering constraints.
What drives your choice between Zustand and Redux Toolkit at scale?
What it tests: matching state philosophy to constraints, not hype. Outline: weigh Zustand's minimal footprint against Redux Toolkit's DevTools and structured async patterns. Red flag: claiming one is always better regardless of team size or debugging needs.
How do you balance unit, integration, and end-to-end tests in Next.js?
This tests allocation of test types across Next.js boundaries. Propose 70 percent unit tests for utilities, 20 percent integration tests for data fetching, and 10 percent end-to-end tests for critical flows, weighing cost and confidence.
What is prop drilling in React?
Define it as threading props through middle layers; give a three-layer example like a theme toggle; cite useContext. Awareness of coupling when props tunnel through indifferent layers. Using Context for every prop.
How do you manage service lifecycle with FastAPI Depends versus formal DI?
Tests scaling FastAPI DI beyond routes. Answer: use Depends(yield) for request-scoped DB sessions; use a formal container for deep singleton service graphs and lifespan wiring; hybrid is best. Red flag: using Depends for everything and ignoring testability.
Describe a common FastAPI project structure and key directories
Main module holds the FastAPI app; domain files (users, items) expose APIRouters; dependencies in their own module; pyproject.toml as entrypoint. Scaling past one file with APIRouter and domain separation.
What is APIRouter in FastAPI and why use it?
It tests your grasp of modular architecture in FastAPI. APIRouter splits routes into separate modules so you include them in the main app with prefixes, tags, and dependencies.
How does product strategy influence architectural decisions? Provide a specific example.
This tests if you tie architecture to product outcomes like iteration speed. A strong answer picks patterns by company stage, cites a concrete tradeoff, and treats reliability as a product feature.
How do you build a 3-year vision supporting roadmap and future options?
This tests strategic planning and executive communication. Map the 1-year roadmap to gaps, invest in extensible primitives, and frame enabling work as optionality with metrics. Red flag: an engineering wishlist disconnected from business outcomes.
Compare webhooks to sandboxed plugins for monolith extensibility
Tests distributed vs in-process extensibility. Webhooks are async, loosely coupled, and isolated but add network latency. Sandboxed plugins run in-process for low-latency UI depth yet need strict host API permissions and lifecycle gating.
Describe an architecture that decouples business launch from code deployment
This tests feature-flag architecture separating deployment from release. Strong answers cover toggle categories and decision decoupling. They need lifecycle management to limit carrying cost. Red flag: treating flags as permanent or ignoring toggle debt.
What process do you initiate when a competitor disrupts your core value?
This tests strategic technical judgment under market pressure. A strong answer covers rapid threat assessment, feasibility spikes, and option analysis weighing speed versus debt, then proposes a staged plan.
Architect dynamic region-specific pricing for a global SaaS product
One SKU with currency-specific rate charges; jurisdiction tax engine; immutable checkout snapshot; amendment for moves. Separating product identity from localized rate plans and billing lifecycle state.
How would you prove roadmap divergence from vision and correct course?
Quantify coupling, complexity, and service creep; link compromises to feature delays; propose a funded ATD roadmap with milestones. Framing architectural drift as measurable business risk.
Propose a platform strategy to beat competitor feature velocity
Tests trading feature parity for architectural leverage. Strong answers frame the platform as an intermediary enabling interactions and innovation via self-service APIs, composable primitives, and data loops. Red flag: a shared library creating bottlenecks.
How would you scope a one-quarter v1 against a three-quarter solution?
Tests bounded technical debt via stable interfaces. A strong answer defines a thin core, pushes complexity into swappable modules, documents debt ledger, and negotiates scope cuts. Red flag: promising to refactor later without concrete boundaries or ownership.
How would you leverage microservices to out-maneuver a monolithic competitor?
Tests turning architecture into product velocity. Exploit competitor's release cycle with independent service teams shipping features in days not months via domain boundaries. Red flag: seeing microservices as purely technical or suggesting big-bang rewrite.
Differentiate functional and non-functional requirements with user research examples.
This tests separating specific behaviors from measurable quality criteria. A strong answer defines functional requirements as behaviors and non-functional requirements as quality attributes with examples. A red flag is vague NFRs like fast.
How do you frame monolith vs microservices trade-offs under market uncertainty?
Connecting architecture to business strategy under uncertainty. Strong answers say monoliths offer cheap optionality when markets are unknown, but winner-take-all makes speed existential; microservices are a post-PMF scaling tax.
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