Totally depends on the position, I was asked Java related questions, starting from OOPs concepts, to functional programming in Java, other Java 8 stuff, IOC, etc. Lots of beginner level questions in SQL.
Internship Interview Questions
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LeetCode problems
Queries are: add an interval and return the length of the union of all intervals.
Profit margin, supplier relations, conflicts with suppliers. They ask why wayfair.
The coding challenge questions were fairly easy, one was string manipulation and the other was based on using basic data structures. The phone screen interview asked how to serialize an n-ary tree.
Why Wayfair?
Both my phone interviews were based on trees and graphs, n-ary tree.
Typical Leet code questions regarding data structures and to code it in google Docs
Given 2 strings containing regular characters and backspace characters (represented by "<"), return true if both strings are the same after all backspaces are processed and false otherwise. ie) should return true for "abc<<de<f" and "adca<<f"
Add a right pointer to a complete binary tree
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