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S3 notes for developers

Master S3 with a curated set of 8 developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · S3

S3 Fundamentals

S3 Fundamentals Amazon S3 is an object storage service with virtually unlimited capacity. Objects are stored in buckets, identified by keys, and organized into storage classes. The AWS CLI makes it easy to interact with

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02 · S3

Permissions & Policies

S3 Permissions & Policies S3 access control has multiple layers: bucket policies (resource-based), IAM policies (identity-based), Block Public Access settings, and Access Points. Understanding when to use each is critica

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03 · S3

Static Hosting & CloudFront

Static Hosting & CloudFront S3 static website hosting combined with CloudFront is the standard low-cost, high-performance deployment for SPAs and static sites. Using OAC (Origin Access Control) keeps the S3 bucket privat

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04 · S3

Advanced Features & CLI

S3 Advanced Features Versioning, lifecycle policies, event notifications, and replication are the production-grade S3 features that enable data protection, cost management, and event-driven architectures. Versioning & Li

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05 · S3

Fundamentals & Bucket Operations

AWS S3: Fundamentals & Bucket Operations Amazon S3 (Simple Storage Service) is object storage built for any amount of data. Objects are stored in buckets. Each object has a key (path-like name), data, and metadata. S3 is

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06 · S3

Storage Classes, Versioning & Lifecycle

S3 Storage Classes, Versioning & Lifecycle S3 offers multiple storage classes optimized for different access patterns. Choosing the right class is the biggest cost lever. Lifecycle rules automate transitions and expirati

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07 · S3

Security, IAM Policies & Access Control

S3 Security, IAM Policies & Access Control S3 security has multiple layers: Block Public Access settings (account and bucket level), bucket policies, IAM policies, ACLs (legacy), and encryption. The default is private —

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08 · S3

Static Hosting, CloudFront & Interview Questions

S3 Static Hosting, CloudFront & Interview Questions S3 Static Website Hosting S3 can serve static websites directly. The website endpoint differs from the REST API endpoint and supports index/error documents and redirect

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