Amazon Interview Question for SDE-2s


Country: India
Interview Type: In-Person




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6
of 6 vote

Use a trie with a twist: Rather than using english alphabets for traversal, use corresponding numbers:
1 for a, b, c
2 for d, e, f
and so on

So taking the path 12 should yield ad, ae, af, bd, be, bf.

- anotherguy September 08, 2013 | Flag Reply
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2
of 2 votes

+1 from me, for just mentioning trie :)

- oOZz September 08, 2013 | Flag
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0
of 0 votes

Can u please provide a simple example ? . How will a word 'aeg' be stored ?

- Raj September 10, 2013 | Flag
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0
of 0 votes

Suppose the dictionary has {"ad", "ae", "aeg", "age"}. It will look like:

{}
                     2|
                     {}
                7/         \3
               {}     {"ad", "ae"}
              3|             |4
          {"are"}    {"aeg"}

- anotherguy September 12, 2013 | Flag
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1
of 1 vote

I would go with Directed Acyclic Word Graph (DAWG). It eliminates Trie's space requirements, while maintaining speed. Refer Wiki

- Anonymous September 22, 2013 | Flag Reply


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