Strings and Nested Data
Affirm's string questions fit on one screen. The three here cover substrings, a two-way encoding, and records with nested fields.
The methods are standard: a counting map, two pointers, and a recursive walk over nested keys. Where people slip is the edges, since every prompt leaves a few undefined.
The Affirm anglePin the output format before you write the loop. Small choices change the answer on all three. Does a tie go to the earliest start or to the first in alphabetical order? Can a count go past 9? How do you type a list that holds both ints and strings? Write a test for every answer you get, then build.
AffirmPremium lesson · Coding round
The 3 Affirm problems are below.
- A Premium questionCoding · Medium · Frequently asked
- A Premium questionCoding · Easy · Frequently asked
- A Premium questionCoding · Medium
Each with hints, the follow-up and a tested solution.
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24 coding · 2 system design · 13 behavioral questions
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