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DOI: 10.14569/IJACSA.2021.0120984
PDF

Collision Resolution Techniques in Hash Table: A Review

Author 1: Ahmed Dalhatu Yusuf
Author 2: Saleh Abdullahi
Author 3: Moussa Mahamat Boukar
Author 4: Salisu Ibrahim Yusuf

International Journal of Advanced Computer Science and Applications(IJACSA), Volume 12 Issue 9, 2021.

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Abstract: One of the major challenges of hashing is achieving constant access time O (1) with an efficient memory space at a high load factor environment when various keys generate the same hash value or address. This problem causes a collision in the hash table, to resolve the collision and achieve constant access time O (1) researchers have proposed several methods of handling collision most of which introduce a non-constant access time complexity at a worst-case scenario. In this study, the worst case of several proposed hashing collision resolution techniques are analyzed based on their time complexity at a high load factor environment, it was found that almost all the existing techniques have a non-constant access time complexity. However, they all require an additional computation for rehashing keys in a hash table some of which is as a result of deadlock while iterating to insert a key. It was also found out that there are wasted slots in a hah table in all the reviewed techniques. Therefore, this work, provides an in-depth understanding of collision resolution techniques which can serve as an avenue for further research work in the field.

Keywords: Hashing; collision resolution; hash table; hash function; slot

Ahmed Dalhatu Yusuf, Saleh Abdullahi, Moussa Mahamat Boukar and Salisu Ibrahim Yusuf, “Collision Resolution Techniques in Hash Table: A Review” International Journal of Advanced Computer Science and Applications(IJACSA), 12(9), 2021. http://dx.doi.org/10.14569/IJACSA.2021.0120984

@article{Yusuf2021,
title = {Collision Resolution Techniques in Hash Table: A Review},
journal = {International Journal of Advanced Computer Science and Applications},
doi = {10.14569/IJACSA.2021.0120984},
url = {http://dx.doi.org/10.14569/IJACSA.2021.0120984},
year = {2021},
publisher = {The Science and Information Organization},
volume = {12},
number = {9},
author = {Ahmed Dalhatu Yusuf and Saleh Abdullahi and Moussa Mahamat Boukar and Salisu Ibrahim Yusuf}
}



Copyright Statement: This is an open access article licensed under a Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, even commercially as long as the original work is properly cited.

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