Citigroup Interview Questions

Preparing for a Citigroup interview? This page contains a curated collection of 3 coding and technical interview questions asked at Citigroup, sourced from real candidate experiences on LeetCode and other platforms.

The questions span a wide range of topics including Array, Prefix Sum, Stack, Monotonic Stack — all areas Citigroup interviewers are known to focus on. Each question is tagged by difficulty (Easy, Medium, Hard) and topic so you can prioritize your preparation effectively.

Whether you're a fresher or an experienced engineer targeting Citigroup, practicing these problems will help you understand the patterns and problem-solving approaches expected in their hiring process. Start with Easy questions to build confidence, then tackle Medium and Hard problems to sharpen your skills.