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Solution - Interview Questions and Answers for 'Search algorithm' - 4 question(s) found - Order By Newest

Advanced level question frequently asked in US based companies. Recently asked in EMC and Intuit.
  Q1. Can you provide some implementation of a Dictionary having large number of words ? Solution
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Ans. Simplest implementation we can have is a List wherein we can place ordered words and hence can perform Binary Search.

Other implementation with better search performance is to use HashMap with key as first character of the word and value as a LinkedList.

Further level up, we can have linked Hashmaps like ,

hashmap {
a ( key ) -> hashmap (key-aa , value (hashmap(key-aaa,value)
b ( key ) -> hashmap (key-ba , value (hashmap(key-baa,value)
....................................................................................
z( key ) -> hashmap (key-za , value (hashmap(key-zaa,value)
}

upto n levels ( where n is the average size of the word in dictionary.

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   Like         Discuss         Correct / Improve     java   collections   hashmap   binary search   search algorithm   advanced   architecture   data structure     Asked in 6 Companies        frequent

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 Q2. What are the pre-requisite for the collection to perform Binary Search ?
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Ans. 1. Collection should have an index for random access.
2. Collection should have ordered elements.

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   Like         Discuss         Correct / Improve     java   collections   search algorithm   search   binary search   at&t      intermediate


 Q3. Explain various Searching and Sorting Algorithms ?Algorithm2017-01-11 16:05:54

 This question was recently asked at 'HeadStrong,ServiceNow'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Search Algorithm  Sorting Algorithm     Asked in 2 Companies      basic        frequent


 Q4. How different is the Search algorithm when we query Cassandra Tables and When we query Oracle Tables ?Cassandra2017-08-18 09:40:40

Ans. Relational Database uses linear search if we don't query using indices. Performance for linear search is O(n). If indices have been used , relational database uses binary search. Performance for binary search is O(Log n).

Casandra uses hash search. Performance for Hash Search is O(1).

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   Like         Discuss         Correct / Improve     cassandra vs oracle  nosql vs relational  search algorithm



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