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UML notes for developers

Master UML with a curated set of 2 developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · UML

UML Fundamentals: Class, Sequence & Use Case Diagrams

UML: Class, Sequence & Use Case Diagrams. UML (Unified Modeling Language) is a standardized, general-purpose visual modeling language for designing and documenting a software system's architecture and behavior. It doesn'…

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02 · UML

UML: Activity, State & Component Diagrams — Practical Use

UML: Activity, State & Component Diagrams — Practical Use. Activity Diagrams: Workflow & Process Logic. [Start] --> (Submit Order) --> <Order value > $1000?> |Yes |No v v (Manager Approval) (Auto-Approve) | | +------>[En…

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TypeScriptgeneral

Interview Questions

TypeScript Interview Questions. Comprehensive TypeScript interview questions covering type system, generics, utility types, and best practices:. Fundamentals. 1. What is TypeScript?. TypeScript is a…

Mar 28, 2026

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TypeScriptgeneral

Advanced Types (Generics & Utility Types)

TypeScript Advanced Types. Generics. // Generic function function identity<T>(arg: T): T { return arg; } const num = identity<number>(42); // Explicit const str = identity('hello'); // Inferred //…

Mar 3, 2026

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