Sai Kumar is a Senior Software Development Engineer at Oracle with expertise in backend systems, distributed architecture, Go, Java, and SQL. He writes technical guides on software engineering interview preparation, system design, and programming concepts.
View all authorsEvery program is built around a model of time: operations that run in order, one after another, or operations that run independently and complete whenever they're ready. Understanding synchronous vs. asynchronous execution is fundamental to writing code that performs well under load.
WebSockets enable real-time, full-duplex communication between a client and server over a single persistent TCP connection. Unlike HTTP, where the client initiates every request, WebSockets allow the server to push data to the client at any time — no polling required.
Concurrent programming refers to a paradigm where multiple tasks make progress independently, potentially interleaved in execution. This is not the same as parallel computing (tasks running at literally the same instant on multiple cores) — concurrency is about structure, not necessarily simultaneous physical execution.
In September 2024, OpenAI released o1 — a model designed not just to generate text but to reason through problems before answering. It represents a meaningful shift in how large language models handle difficult reasoning tasks, particularly in mathematics, coding, and science.