# Arrays Interview Questions

- You are given an array with integers between 1 and 1,000,000. One integer is in the array twice. How can you determine which one? Can you think of a way to do it using little extra memory.
- You are given an array with integers between 1 and 1,000,000. One integer is missing. How can you determine which one? Can you think of a way to do it while iterating through the array only once. Is overflow a problem in the solution? Why not?
- Returns the largest sum of contiguous integers in the array

Example: if the input is (-10, 2, 3, -2, 0, 5, -15), the largest sum is 8

int GetLargestContiguousSum(int* anData, int len) - Implement Shuffle given an array containing a deck of cards and the number of cards. Now make it O(n).
- Return the sum two largest integers in an array

int SumTwoLargest(int* anData, int size) - Sum n largest integers in an array of integers where every integer is between 0 and 9

int SumNLargest(int* anData, int size, int n)

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