Barclays DSA Interview Questions

Gearing up for a Barclays Technology Analyst or Software Engineer interview in 2026? This DSA sheet is mapped to what Barclays actually tests in its coding rounds and technical interviews — a solid mix of arrays, strings, and hash-based problems, linked list and tree fundamentals, and OOP-heavy design questions inspired by real banking systems like account ledgers, transaction processing, and order matching. Barclays interviews typically move through 2-3 problems per round, rewarding candidates who write clean, correct code quickly and can reason confidently about time and space complexity. This sheet compiles 57 of the most frequently reported Barclays interview questions sourced from LeetCode and GeeksforGeeks, tagged by topic, difficulty, and candidate-reported popularity — so you prepare with focus instead of guesswork.