Posts

Notes on software development and lessons learned.

Recent posts

• Browser Storage: Local Storage and Session Storage

  Compare local storage and session storage by persistence and scope, see how they differ from cookies, and review common interview questions.

• Database Normalization and Denormalization

  Learn the first three normal forms, why reducing duplication matters, and the trade-offs of using denormalization to reduce JOINs and improve read performance.

• 가상 메모리의 (페이징과 페이지 교체 알고리즘)

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• 메모리의 모든 것 (Stack, Heap, GC, 누수)

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• 자바스크립트 this 바인딩의 4가지 규칙

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• 자바스크립트 클로저, 호이스팅, 버블링

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• 객체 지향 프로그래밍(OOP)의 4가지 핵심 원칙

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• ORM의 개념과 장단점, 그리고 N+1 문제

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• 웹 보안 3대 취약점 (XSS, CSRF, SQL Injection)과 방어법

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• 실시간 통신 기술 비교 (Polling, Webhook, SSE, WebSocket)

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• 프로세스와 스레드의 차이 이해하기

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• 타입 세이프 쿼리, QueryDSL 시작하기

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• 캐싱 전략 완벽 가이드 (Redis, CDN)

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• 관점 지향 프로그래밍(AOP)의 개념과 활용 사례

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• 의존성 주입(DI)과 제어의 역전(IoC) 완벽 이해

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• SQL 쿼리 성능 최적화 방안

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• 데이터베이스 트랜잭션과 ACID 원칙 완벽 이해

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• RDBMS와 NoSQL, 무엇을 선택해야 할까?

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• CORS 동작 원리와 핵심

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• 도커와 쿠버네티스, 컨테이너 기술

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• 쿠키와 세션의 동작 원리

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• How Database Indexes Work and What They Cost

  Learn how database indexes improve SELECT performance, why indexing everything is impractical, and how faster reads trade off against slower writes.

• REST API란?

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• Preparing for Developer Personality and Aptitude Tests

  Prepare for developer hiring assessments with common personality questions, timed aptitude practice, and ways to answer honestly and consistently.