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PrepStack is a tech learning hub for developers. We publish long-form articles on .NET, React, AI/ML, and SaaS architecture — and a growing library of categorised interview questions with detailed answers across .NET, React, SQL, and system design.
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1.2M PDF reports in 48h on ASP.NET Core + CQRS + PuppeteerSharp + Azure — browser pooling, autoscale workers, CDN cache. Mattrx p95 9s, $0.0004/PDF.
Part 4 (finale) of a 14-year ASP.NET series: choosing Azure architecture, real observability, and AI as an engineered component.
Part 3 of a 14-year ASP.NET series: the performance techniques that move p95, when microservices help, and the patterns that earn their keep.
Real questions with detailed answers, ranked by difficulty.
Drill straight into a stack you care about.
When to reach for Minimal APIs, when to stick with controllers, and how to structure a maintainable codebase.
Stop fighting the new boundary. A short field guide for engineers shipping App Router apps.
Schema-per-tenant vs shared schema, edge caching, and how to defer paid infra until you actually need it.