Follow-up · depth 6
Design a small subsystem that relies on Built-in Control Flow @if @for @switch
Design a small subsystem that relies on Built-in Control Flow @if @for @switch
Answers use simple, clear English.
Audio N/AQuick interview answer
Sketch components, data flow, failure modes, and metrics around Built-in Control Flow @if @for @switch. Example shape: @for (item of items(); track item.id) { <li>{{ item.name }}</li> }
Detailed answer
Mini design using Built-in Control Flow @if @for @switch: • Components: API edge, worker/queue, store, and observability. • Data flow: request → Built-in Control Flow @if @for @switch-related path → response/async side effects. • Failure modes: timeouts, overload, partial dependency loss. • Metrics: latency, errors, saturation for the Built-in Control Flow @if @for @switch path. Guardrails: Always track by identity; prefer new syntax in Angular 17+. Parent context: Pros: Clearer templates; forces track for lists. Cons: Muscle memory of structural directives.
Full explanation
Interviewers want a crisp architecture story anchored on Built-in Control Flow @if @for @switch, not a buzzword list. New template syntax replaces *ngIf/*ngFor for many cases: @if, @for (with track), @switch. Better type narrowing and performance guidance via mandatory track.
Follow-up questions
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Parent context — Built-in Control Flow @if @for @switch
Pros: Clearer templates; forces track for lists. Cons: Muscle memory of structural directives.
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