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BlackBerry Software Developer Co-Op Interview Question

I interviewed in Waterloo, ON (Canada) and was asked:
"Write a function to sort N decks of 52 playing cards represented as an integer array with indexes from 0 to N*52 - 1. You are supplied a random generator that produces numbers from 0 to N - 1 for this task. What is the worst case runtime and memory bound?"
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Part of a Software Developer Co-Op Interview Review - one of 383 BlackBerry Interview Reviews

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Iterate the array and on each iteration use the random number generator to select another cell in the array to swap your current value with. O(N) runtime, O(1) memory usage.
- Interview Candidate on Oct 30, 2009

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