Interview Question

Front End Engineer Interview

-Menlo Park, CA


Signed NDA. But phone interview questions were same as mentioned many times here: flatten array, optimize a function, implement a simple Observable.


Interview Answers

3 Answers


Was the architectural have to do with a trie or hash table?

Jane Doe on


Architecture interview supposes more high-level questions, where you need to operate several areas, like JS and DOM, browser performance, etc.

Anonymous on


VanillaJS (important!), basic JS data structures including ES6 ones, their usage nuances (what?/when?/why?), at least basic algorithms (array sorting, tree traversal), big-O. Not sure about HTML/CSS; as some noted, that there were also non-JS questions, but my phone interview was focused on algorithms, DS, and big-O.

Anonymous on

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