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troubleshooting Question

Searching duplicates from a huge data set

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HukkaHua asked on
28 Comments1 Solution447 ViewsLast Modified:
Hi ,
     This question is from one of the popular books .

Given a sequential  file containing 4,300,000,000 integers, how can you find one that appears at least once ?
a) How to solve it with ample quantities of memory
b) External scratch files are allowed but only few hundred bytes of main memory is available.

I am aware of the bit map technique, where we map each integer to a bit and so on.
Any solution to the above problem is greatly appreciated.

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