What is a collision in hashing?
Understand the Problem
The question is asking for a definition of a collision in the context of hashing. Hashing is a process of mapping large amounts of data items to smaller tables using a hashing function. A hashing collision occurs when two different keys produce the same hash value, thus mapping to the same location in the hash table. Understanding how collisions are handled is crucial for efficient hash table implementations.
Answer
A hash collision is when two different inputs produce the same hash value using a hash function.
A hash collision occurs when a hash function produces the same output (hash value) for two different inputs. This is a common issue in computer science when using hash tables.
Answer for screen readers
A hash collision occurs when a hash function produces the same output (hash value) for two different inputs. This is a common issue in computer science when using hash tables.
More Information
Hash collisions are more likely to occur as the number of inputs increases relative to the size of the hash table. Collision resolution techniques are used to handle these situations, such as separate chaining and open addressing.
Tips
A common mistake is to think that a good hash function will completely eliminate collisions. While a good hash function minimizes collisions, it's impossible to avoid them entirely, especially with a large number of possible inputs.
Sources
- Hash collision - Wikipedia - en.wikipedia.org
- Hash Collisions Explained | Cryptocurrency & Blockchain Technology - freemanlaw.com
- What is collision in a hash algorithm? - Quora - quora.com
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