JavaScript Language Specifics Questions

Assess detailed knowledge of JavaScript language features and idioms used to implement algorithms and user interfaces. Topics include native array and string methods and their performance characteristics, functional patterns such as map filter and reduce, object and collection usage including Set and Map, closures and lexical scope, prototype based inheritance, the event loop and asynchronous programming with promises and async await, memory and performance implications, writing efficient loops and handling edge cases, debugging strategies, and reasoning about time and space complexity when selecting data structures.