https://example.com Backend Study Lab publishes practical Java, backend engineering, algorithms, API design, and system design guides with fast browser-based developer tools. en Sun, 28 Jun 2026 19:20:56 GMT https://example.com/blog/time-complexity-of-java-collections https://example.com/blog/time-complexity-of-java-collections A practical reference for Java collection time complexity, including ArrayList, LinkedList, HashMap, TreeMap, HashSet, and PriorityQueue. Sun, 10 May 2026 00:00:00 GMT https://example.com/blog/csrf-vs-xss https://example.com/blog/csrf-vs-xss Compare CSRF and XSS attacks for backend developers, including how they work, why cookies and tokens matter, and practical defenses. Sun, 03 May 2026 00:00:00 GMT https://example.com/blog/oauth-2-explained-for-backend-developers https://example.com/blog/oauth-2-explained-for-backend-developers A backend-focused OAuth 2.0 guide covering roles, authorization code flow, PKCE, scopes, tokens, client credentials, and common mistakes. Sun, 19 Apr 2026 00:00:00 GMT https://example.com/blog/access-token-vs-refresh-token https://example.com/blog/access-token-vs-refresh-token Compare access tokens and refresh tokens in backend authentication, including lifetime, storage, rotation, revocation, and security tradeoffs. Sun, 12 Apr 2026 00:00:00 GMT https://example.com/blog/pagination-strategies-for-rest-apis https://example.com/blog/pagination-strategies-for-rest-apis Compare offset, cursor, and keyset pagination for REST APIs, including tradeoffs, response shapes, sorting, and backend performance. Sun, 05 Apr 2026 00:00:00 GMT https://example.com/blog/idempotency-in-apis-explained https://example.com/blog/idempotency-in-apis-explained Learn what idempotency means in API design, why retries create duplicate actions, and how idempotency keys protect backend workflows. Sun, 29 Mar 2026 00:00:00 GMT https://example.com/blog/rest-api-status-codes-explained https://example.com/blog/rest-api-status-codes-explained Understand the HTTP status codes backend developers use most often in REST APIs, including 200, 201, 400, 401, 404, 409, and 500. Sun, 22 Mar 2026 00:00:00 GMT https://example.com/blog/concurrenthashmap-explained https://example.com/blog/concurrenthashmap-explained A practical explanation of ConcurrentHashMap in Java, including thread safety, atomic methods, iteration behavior, and common mistakes. Sun, 15 Mar 2026 00:00:00 GMT https://example.com/blog/hashmap-load-factor-explained https://example.com/blog/hashmap-load-factor-explained Learn what HashMap load factor means in Java, how it affects resizing, memory usage, and lookup performance. Sun, 08 Mar 2026 00:00:00 GMT https://example.com/blog/arraylist-vs-linkedlist-in-java https://example.com/blog/arraylist-vs-linkedlist-in-java Compare ArrayList and LinkedList in Java by access patterns, insertion cost, memory overhead, and practical backend usage. Sun, 01 Mar 2026 00:00:00 GMT https://example.com/blog/big-o-notation-explained https://example.com/blog/big-o-notation-explained Learn Big-O notation with practical backend examples, including arrays, hash maps, sorting, nested loops, and database-like thinking. Wed, 04 Feb 2026 00:00:00 GMT https://example.com/blog/jwt-vs-session https://example.com/blog/jwt-vs-session Understand JWT and server-side session authentication, including storage, revocation, scaling, security risks, and common backend use cases. Wed, 28 Jan 2026 00:00:00 GMT https://example.com/blog/rest-vs-rpc https://example.com/blog/rest-vs-rpc Compare REST and RPC API styles through resources, actions, payload design, caching, versioning, and backend team workflows. Wed, 21 Jan 2026 00:00:00 GMT https://example.com/blog/java-priorityqueue-explained https://example.com/blog/java-priorityqueue-explained Learn how Java PriorityQueue works, when to use it, how ordering is defined, and common pitfalls around iteration and custom comparators. Wed, 14 Jan 2026 00:00:00 GMT https://example.com/blog/hashmap-vs-hashtable-in-java https://example.com/blog/hashmap-vs-hashtable-in-java Compare HashMap and Hashtable in Java, including synchronization, null keys, performance, legacy status, and modern alternatives. Thu, 08 Jan 2026 00:00:00 GMT