Affirm Interview Guide

Showing 3 of 11 questions

Ranking

A question's ranking corresponds to how commonly it's asked by Affirm. The higher the ranking, the more likely you'll encounter it in a Affirm interview.

Question

Frequency

Difficulty

Shortest Uncommon Substring in an Array

Find the shortest string that is not a substring of any string within a given array of strings. Return this shortest uncommon substring.

ArraysStringsTwo PointersSliding Windows

Very likely

If you have a Affirm interview, it's very likely that you will get this question

Medium

#1. Shortest Uncommon Substring in an Array

Medium

Find the shortest string that is not a substring of any string within a given array of strings. Return this shortest uncommon substring.

ArraysStringsTwo PointersSliding Windows

This question is very likely to be asked in your Affirm interview

Insert Delete GetRandom O(1)

Design a data structure that supports insertion, deletion, and random element retrieval, all in constant time on average. You'll need to handle edge cases carefully to achieve O(1) complexity.

ArraysHash Table

Very likely

If you have a Affirm interview, it's very likely that you will get this question

Medium

#2. Insert Delete GetRandom O(1)

Medium

Design a data structure that supports insertion, deletion, and random element retrieval, all in constant time on average. You'll need to handle edge cases carefully to achieve O(1) complexity.

ArraysHash Table

This question is very likely to be asked in your Affirm interview

Group Anagrams

Given a list of words, group together all the anagrams. Anagrams are words that contain the same letters rearranged.

ArraysStrings

Somewhat likely

If you have a Affirm interview, you might get this question

Medium

#3. Group Anagrams

Medium

Given a list of words, group together all the anagrams. Anagrams are words that contain the same letters rearranged.

ArraysStrings