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The writeup specified that the output was to be printed the array reflecting the rotation. Nothing about having to actually create a rotated array and dump it to the console. And considering the submitter never supplied a stub to the actual rotation routine specifying the return as being an array, this is a legitmate answer. Likely not the one the OP intended.
If I were to give a coding test to someone I'd toss them something like this. Likely they'd code out a fancy in-place algorithm, in which I would warn them that they were over-engineering the solution for the specified output.
Left Rotation
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This does the rotation in place. 1 line solution.
for (int i = d; i < d + n; i++) Console.Write($"{a[i%n]} ");
The writeup specified that the output was to be printed the array reflecting the rotation. Nothing about having to actually create a rotated array and dump it to the console. And considering the submitter never supplied a stub to the actual rotation routine specifying the return as being an array, this is a legitmate answer. Likely not the one the OP intended.
If I were to give a coding test to someone I'd toss them something like this. Likely they'd code out a fancy in-place algorithm, in which I would warn them that they were over-engineering the solution for the specified output.