Runs in your browser · .NET WebAssembly

Practice .NET interview problems

Don't just read the answers — solve them. Pick a problem, write real C#, and run it against hidden test cases right here. When you're stuck (or done), reveal the optimal solution with full complexity analysis.

Reverse an array

EasyArrays

Return a new array with the elements of `nums` in reverse order. Aim to do it in a single pass with O(1) extra space (besides the output).

C# · runs in your browser

public static class Solution
{
    // Return the elements of nums in reverse order.
    public static int[] Reverse(int[] nums)
    {
        // TODO: your solution here
        return nums;
    }
}

Implement the method, then press Run tests (or ⌘/Ctrl+Enter). Your code is checked against hidden test cases.

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