Top 50 Frontend Engineer Interview Questions

Flatten nested ThoughtSpot configuration objects into dot-delimited paths using an iterative stack.

javascriptZumperMindticklethoughtspot

Use a closure with nonlocal state to process add and read operations on a running total.

CodingjavascriptabstractionRokuCCleverTapAccenture

Process Like button actions as a state machine while keeping its liked status and count consistent.

Codingclean codereactAADCI - KarnatakaAmazon Kuiper Commercial ServicesSupermicro

Return a structured comparison of LocalStorage, SessionStorage, and Cookies by scope, lifetime, capacity, and request behavior.

Codingdata persistenceapiAAdvantal TechnologiesPublicis SapientVLink

Flatten a nested array into a single list using recursion or an explicit stack while preserving left-to-right order.

RecursionStackArraysSentinelOneBask HealthSolytics Partners

Reverse a string using basic iteration and swapping, without built-in reverse helpers.

Basic Algorithmsfunction implementationStringsCCypress GFISSagitec Solutions