Cracking the Capital One Software Engineer OA: Key Insights on Challenging Questions

Software Engineering
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capitalone | Software Engineer | Interview Experience

Interview Date: Not specified
Result: Not specified
Difficulty: Not specified

Interview Process

The interview process included an online assessment (OA) lasting 70 minutes, consisting of four questions. The first two questions were of easy difficulty, focusing on basic string and array operations. The latter two questions were of medium to hard difficulty, particularly emphasizing simulation problems. Candidates often struggled with the third question, which required a full pass before attempting the fourth.

Technical Questions

  1. Question 3:

    • Given a sequence of samples by arrival time, a single machine processes each sample for a fixed X seconds. When the machine is busy, samples go into a FIFO freezer of capacity Y. If the freezer is full, samples are discarded, and the completion time of the last received sample is returned.
      • Related LeetCode problems: LC 56, LC 71, LC 1861, LC 210, LC 723, LC 2043.
    • Given a two-dimensional matrix moistureGrid representing soil moisture and an integer smoothingRadius, update the moisture value for each cell based on the average of its neighbors within the radius.
    • Given a two-dimensional array nums[][] and an integer n, compute a new value for each element based on the average of surrounding elements, excluding itself.
    • Implement a function to achieve a 90-degree flip of a two-dimensional array.

  2. Question 4:

    • Given a grid (n * m), starting at [0,0] and needing to reach [n-1, m-1], navigate through teleports and obstacles. If a teleport is encountered, transport from one point to another. Movement is restricted by obstacles and grid boundaries.

Tips & Insights

Candidates should focus on understanding simulation problems and practice similar questions to improve their chances of success.