Experience with CapOne.
Round 1: Code Signal OA
All posts were right about the difficulty levels on the problems.
4 problems, first 2 are super simple, almost like your very first programming assignment. It also mentioned not to worry about optimal solution.
Every post said third problem is the hardest and it was. I skipped it to go to fourth question which was medium hard, definitely has a trick to solving it. Was a subarray problem. Solution only passed half of the test cases.
Raw score was > 750/1200, score after review > 400
Round 2:
1 Coding (1h)
1 System Design (1h)
1 Behavioral (1h)
1 Case Study (1h)
Coding Interview:
Not Leetcode. Not creating a service but writing a method to do some business logic. All leetcode tagged questions are hard but the question was easy with new requirements added as you complete the current one.
System design interview:
Similar to any other company.
Behavioral interview:
Similar to any other company.
Case study:
Never encountered this in any other company. Interview was in three parts - conceptual questions about software development techniques, analytical reasoning (think simple math problem) and code review based on the reasoning before. They are all tied together by some theme. Not hard just an uncommon interview type.
Self assessment - Ok in coding, good in system design, mostly good in behavioral, did great in the first two sections of case study and flunked in third part.
Note - Cap One does all their interviews in one day. All my interviews were back to back one hour each. By the time I reached the last half case study interview, I was fully drained. Lesson learned to definitely ask for a break.