https://knowledge-base.somyashrestha.space/ In-depth technical study notes — Java, C++, DSA. en Thu, 16 Jul 2026 12:24:33 GMT https://knowledge-base.somyashrestha.space/java/design-patterns.html https://knowledge-base.somyashrestha.space/java/design-patterns.html Java Thu, 16 Jul 2026 12:24:33 GMT Singleton, Factory, Builder, Strategy, Observer and Decorator — the six that actually come up. Don't memorise all 23; understand these deeply enough to code them from scratch and to know when not to. https://knowledge-base.somyashrestha.space/java/jvm.html https://knowledge-base.somyashrestha.space/java/jvm.html Java Thu, 16 Jul 2026 12:24:33 GMT Heap vs stack, class loading, garbage collection, and the errors that wake you at 3am — enough to debug a real production problem and answer "why is your service using 4GB?" with something better than a shrug. https://knowledge-base.somyashrestha.space/java/concurrency.html https://knowledge-base.somyashrestha.space/java/concurrency.html Java Thu, 16 Jul 2026 12:24:33 GMT Threads, locks, visibility, the memory model, executors, CompletableFuture and virtual threads — built up from why shared memory is dangerous, through to the tools that make it safe. This is where backend interviews get serious. https://knowledge-base.somyashrestha.space/java/modern-java.html https://knowledge-base.somyashrestha.space/java/modern-java.html Java Thu, 16 Jul 2026 12:24:33 GMT Lambdas, functional interfaces, method references and Streams; then records, sealed types, pattern matching and text blocks. This is the difference between code that looks current and code that looks like 2012. https://knowledge-base.somyashrestha.space/java/exceptions.html https://knowledge-base.somyashrestha.space/java/exceptions.html Java Thu, 16 Jul 2026 12:24:33 GMT Checked vs unchecked, the hierarchy, try-with-resources, custom exceptions, and the judgment call that actually matters in real code — when to wrap, when to propagate, and when to shut up and let it fly. https://knowledge-base.somyashrestha.space/java/generics.html https://knowledge-base.somyashrestha.space/java/generics.html Java Mon, 13 Jul 2026 16:05:11 GMT Type parameters, bounds, wildcards, PECS and type erasure — everything you need to read and write modern Java confidently, explained from the problem they solve up to the tricks the compiler plays behind your back. https://knowledge-base.somyashrestha.space/java/collections.html https://knowledge-base.somyashrestha.space/java/collections.html Java Mon, 13 Jul 2026 16:05:11 GMT Every list, set, map and queue in Java, explained from the ground up in plain language — then taken all the way down to the internals interviewers actually dig into (especially how HashMap really works). https://knowledge-base.somyashrestha.space/java/oops.html https://knowledge-base.somyashrestha.space/java/oops.html Java Mon, 13 Jul 2026 13:49:54 GMT Object-oriented programming explained from scratch in plain language, then taken down to the details that matter in real code and in interviews.