Affirm DSA Interview Questions

What Affirm asks in the DSA round

Affirm favours practical, product-shaped coding over puzzles, plus medium DSA and a design round on lending, repayment schedules and money-safe arithmetic.

Across the 10 questions on this page, the weight sits on these patterns:

• Design — 2 questions · read the design data structure guide
• Dynamic Programming — 2 questions · read the dynamic programming guide
• Sorting — 2 questions
• Binary Search — 1 question · read the modified binary search guide
• Stack — 1 question
• Trie — 1 question
• Two Pointers — 1 question · read the two pointers guide

How to prepare for the Affirm interview

1. 1. Start at the top of the list above. The patterns are ordered by how often Affirm uses them, so the first two or three buy you the most coverage per hour.
2. 2. Solve by pattern, not at random. Doing eight design problems in a row is what makes the ninth recognisable in an interview — jumping between topics does not.
3. 3. Tick problems off as you go so the gaps are visible. The per-pattern counts tell you which Affirm topic you have actually covered.
4. 4. Write the approach before the code. Affirm interviews are judged on the reasoning as much as the working solution.
5. 5. Pair this with the pattern guides when a topic is new, and the system design sheet if the role is senior enough to have that round.
6. 6. If this is a campus or off-campus drive rather than a lateral move, the placement preparation guide covers the stages around the DSA round — aptitude, core subjects and the HR interview — in the order they actually happen.

Affirm interview questions — FAQ

Related