Articles

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Armen Melkumyan

From .Net Senior Interview questions: Sy...

The article explains SynchronizationContext and ExecutionContext in .NET and how they interact with async/await. SynchronizationContext controls where continuations run. ExecutionContext`

Armen Melkumyan

If you are preparing for a React / Front...

The article provides a structured preparation guide for Senior React / Frontend technical interviews. It organizes interview questions by major

Armen Melkumyan

.NET Dependency Injection Under the Hood...

The article explains how Dependency Injection (DI) works internally in .NET and how service lifetimes affect application behavior. Covers Transient,

Armen Melkumyan

Versioned keys: freshness by identity, n...

Versioned keys prevent stale data from overwriting newer state by giving each update a unique version and keeping a pointer

Armen Melkumyan

How Large Language Models Retrieve, Vali...

The article explains how LLMs retrieve, validate, and combine external information to improve answer quality. It covers RAG, where

Armen Melkumyan

Mathematical Foundations and Architectur...

The article explores the mathematical foundations and architectures of OpenAI and Anthropic AI models. It explains key Transformer concepts

Armen Melkumyan

Ranking and Reranking in LLM Systems...

The article explains how ranking and reranking improve retrieval quality in LLM and RAG systems. Ranking quickly retrieves potentially

Armen Melkumyan

Finalization vs. IDisposable vs. IAsyncD...

The article explains how resource cleanup works in .NET and when to use finalizers, IDisposable, and IAsyncDisposable. IDisposable is the

Armen Melkumyan

Improving React UI Responsiveness with u...

React useDeferredValue useDeferredValue helps keep React interfaces responsive when an update triggers expensive rendering. For example, in a search page,

Armen Melkumyan

Video Metadata Caching – The Vimeo Bluep...

Vimeo uses groupcache to prevent cache stampedes. When many requests miss the same metadata key, groupcache coordinates the miss so

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NASA Plans to Place Nuclear Reactor on t...

NASA is planning to put a nuclear reactor on the moon by 2030. Transportation Secretary Sean Duffy, the former reality