Design Virtual Museum - System Design | WinJob

Virtual museum product framing and exhibit ontology

Design a global virtual museum where visitors explore photogrammetry-grade galleries in WebXR or desktop 3D, optionally with haptic gloves that stream force feedback for artifact touch.

Numbers to state early

Metric A: 12M MAU
Metric B: p99 scene load 2.8s
Metric C: USDZ+glTF

Mechanism

Each exhibit is an immutable scan revision with LOD pyramid (4K→512), legal rights envelope, and spatial anchor in a navigable floor mesh. Curators publish drafts; visitors only see signed release manifests.

Failure and edge cases

Applying a new scan revision without versioned instance IDs breaks bookmarks—always mint exhibit_revision_id and keep prior revisions addressable for 90 days.

Java

javaOne Dark Pro

1 public record ExhibitRevision(long revisionId, String checksum, Instant publishedAt) {
2   public ExhibitRevision {
3     if (revisionId < 1) throw new IllegalArgumentException("revisionId");
4   }
5   public boolean supersedes(ExhibitRevision other) {
6     return other == null || this.revisionId > other.revisionId;
7   }
8 }

Python

pythonOne Dark Pro

1 @dataclass(frozen=True)
2 class ExhibitRevision:
3     revision_id: int
4     checksum: str
5     published_at: datetime
6  
7     def supersedes(self, other: "ExhibitRevision | None") -> bool:
8         if self.revision_id < 1:
9             raise ValueError("revision_id")
10         return other is None or self.revision_id > other.revision_id

TypeScript

typescriptOne Dark Pro

1 export interface ExhibitRevision {
2   revisionId: number;
3   checksum: string;
4   publishedAt: string;
5 }
6  
7 export function supersedes(a: ExhibitRevision, b: ExhibitRevision | null): boolean {
8   if (a.revisionId < 1) throw new Error("revisionId");
9   return b === null || a.revisionId > b.revisionId;
10 }

Why interviewers care

Virtual Museum interviews reward crisp scope, explicit trade-offs, and failure stories—not generic microservice diagrams.

Interview checkpoint

Name one failure story for Virtual museum product framing and exhibit ontology that proves you understand real outages, not happy-path diagrams.

Key Highlights

•12M MAU
•Visitor Client → Scene Graph → Asset CDN
•Design a global virtual museum where visitors explore photogrammetry-grade galleries in We

1	public record ExhibitRevision(long revisionId, String checksum, Instant publishedAt) {
2	public ExhibitRevision {
3	if (revisionId < 1) throw new IllegalArgumentException("revisionId");
4	}
5	public boolean supersedes(ExhibitRevision other) {
6	return other == null \|\| this.revisionId > other.revisionId;
7	}
8	}

1	@dataclass(frozen=True)
2	class ExhibitRevision:
3	revision_id: int
4	checksum: str
5	published_at: datetime
6
7	def supersedes(self, other: "ExhibitRevision \| None") -> bool:
8	if self.revision_id < 1:
9	raise ValueError("revision_id")
10	return other is None or self.revision_id > other.revision_id

1	export interface ExhibitRevision {
2	revisionId: number;
3	checksum: string;
4	publishedAt: string;
5	}
6
7	export function supersedes(a: ExhibitRevision, b: ExhibitRevision \| null): boolean {
8	if (a.revisionId < 1) throw new Error("revisionId");
9	return b === null \|\| a.revisionId > b.revisionId;
10	}