Capital one Interview Questions (1+ Questions)
Last Updated: June 8, 2026 • 1 Questions • Real Company Interviews
Prepare for your Capital one interview with our comprehensive collection of 1+ real interview questions and detailed answers. These questions have been curated from actual Capital one technical interviews across various roles including DevOps Engineer, Data Engineer, QA Engineer, and more.
Table of Contents
- Valid Palindrome (easy)
Our Capital one interview questions cover a wide range of technical topics and difficulty levels, from entry-level positions to senior roles. Each question includes detailed explanations and answers to help you understand the concepts and prepare effectively for your interview.
💡 Pro Tips for Capital one Interviews
- Practice each question and understand the underlying concepts
- Review Capital one's specific technologies and methodologies
- Prepare follow-up questions and edge cases
- Practice explaining your solutions clearly and concisely
Interview Questions & Answers
1. Valid Palindrome
def is_palindrome(s: str) -> bool:
l, r = 0, len(s) - 1
while l < r:
if not s[l].isalnum():
l += 1
continue
if not s[r].isalnum():
r -= 1
continue
if s[l].lower() != s[r].lower():
return False
l += 1
r -= 1
return True
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