Easier than I expected, honestly braced for something harder.
Clarify the problem constraints (e.g., input size, whether the array can be modified in-place, and expected output format) before proposing a solution. Then walk through a two-pass approach: first filter out odd numbers, then reverse the remaining evens, discussing time and space complexity. Finally, consider edge cases and potential optimizations.
Pro tip: Demonstrate awareness of production concerns by mentioning that in a real system, you'd likely use a single pass with a stack or two-pointer technique to avoid unnecessary intermediate arrays, and you'd discuss trade-offs between readability and performance.
Ask about input size, whether the array can be modified in-place, and the expected output format (e.g., new array vs. in-place). This shows you think about practical implications.
Describe a two-step approach: iterate through the array to collect even numbers, then reverse the collected list. Mention time complexity O(n) and space complexity O(k) where k is the number of evens.
Propose a single-pass solution using a stack or two-pointer technique to achieve O(n) time and O(1) extra space if in-place modification is allowed. Explain the trade-offs.
Mention edge cases such as empty array, all odd numbers, all even numbers, and very large arrays. Explain how your solution handles them.
If coding is required, write modular, readable code with meaningful variable names. Walk through a small example to verify correctness.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.