Asynchronous Programming Fundamentals Questions

Core concepts and patterns for writing non blocking asynchronous code across languages and runtimes. Topics include callbacks, Promises and their lifecycle, async and await syntax, the event loop and task queues, error propagation and handling, common combinators and utilities such as Promise dot all and Promise dot race, cancellation and abort semantics, avoiding callback hell, and reasoning about ordering and timing of asynchronous tasks. Interviewers assess understanding of when and why to use different abstractions, how to avoid and detect race conditions, and how asynchronous control flow integrates with application architecture.