Capital One OA - 4 questions on CodeSignal, finished 3 properly

Capital One OA - 4 questions on CodeSignal, finished 3 properly

Result: Pending Number of Rounds: 1

Got an OA invite about a week after applying. It's on CodeSignal with camera and microphone required. Have your ID ready to upload before starting because the verification step takes a few minutes and eats into your time if you're not prepared.

70 minutes for 4 problems. Score breakdown is 1200 total, 300 each, about 20 test cases per question.

Q1 was the symmetric triplet count. Given a string, count triplets where first and last characters match case-insensitively. Quick, maybe 8 minutes.

Q2 was a matrix operations problem. Given an n×m matrix and a list of commands: reverseRow, swap rows, rotate 90° clockwise. Implementation-heavy but no tricks. About 15 minutes.

Q3 was the battery charging problem. Phone runs for T minutes, batteries with capacities and recharge times cycle in a queue, find minimum batteries needed. Got the logic but edge cases took a while. Spent 25 minutes here.

Q4 was the integer pair concatenation. Given a list and a target string, count ordered pairs whose concatenation equals it. Had the concept but ran out of time debugging a hash map issue on duplicates. Left it at maybe 85% coverage.

Final score around 920/1200. Not sure what the cutoff is. Waiting to hear back.

3 YOE