JavaScript Fundamentals and Algorithms Questions

Core JavaScript language fundamentals and idioms used when solving algorithmic problems. Candidates should demonstrate proficiency with arrays and object manipulation, loops, conditionals, sorting and searching techniques, and common built in methods such as map, filter, reduce, slice, and split. Understand variable scope, lexical scoping, closure formation, and the memory implications of closures, and how these concepts interact with asynchronous callbacks. Be prepared to apply these primitives to design correct and efficient iterative or recursive solutions and reason about edge cases and correctness.