I gave a OA Codesignal test for CapitalOne Senior Software Engineer - Full Stack role. All the LeetCode discussions was accurate enough. I got 4 questions in total.

1. Easy array question
   Can't remember the question but doesn't require much effot

2. Sorting deck
   We would be given a deck of cards and we need to find in how many shuffle the deck will be sorted. A shuffle means picking a card from front and adding it to the end. Brute Force itself got accepted.

3. Grid BFS
   We would be given a 2D matrix with numbers from 0 to 255 and a maxRadius we can look upon. For each (i, j) we need to got the neighbor cells on all 8 directions upto the maxRadius given. For example, for (0, 0) with maxRadius of 2, (0, 2) is a potential neighbor. We need to find the mean of all neighbors and fill a new matrix with the answers.
   PS: Would feel easy if you practice a lot of graph based traversal questions

4. Largest Square in Histogram
   Similar one as largest rectangle in histogram. Only change is we need to find the largest square instead. Brute force got TLE so we need to use monotonic stack based solution

Verdict: Got 600/600. Waiting for furthur communication.