Hashing - Open Addressing or Closed Hashing

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Hashing - Open Addressing

The open addressing method is also called closed hashing. In Open addressing, the elements are hashed to the table itself. If two elements hash to the same location, a collision occurs. To resolve the collision, an empty location is searched for. The hash function for open addressing is given that

hi(X) = ( Hash(X) + F(i) ) % TableSize

       with F(0) = 0, F(1)=1, F(2)=2 and so on.

where Hash(X) = X % TableSize and the function F(i) is called the Collision Resolution Strategy.


Open addressing needs a large table than separate chaining because all the data will be stored inside the hash table. There are 3 collision resolution techniques:

  1. Linear Probing
  2. Quadratic Probing
  3. Double Hashing

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Next - Linear Probing>>







Hashing - Open Addressing or Closed Hashing

<<Previous - Open Hashing

Next - Linear Probing>>





Hashing - Open Addressing

The open addressing method is also called closed hashing. In Open addressing, the elements are hashed to the table itself. If two elements hash to the same location, a collision occurs. To resolve the collision, an empty location is searched for. The hash function for open addressing is given that

hi(X) = ( Hash(X) + F(i) ) % TableSize

       with F(0) = 0, F(1)=1, F(2)=2 and so on.

where Hash(X) = X % TableSize and the function F(i) is called the Collision Resolution Strategy.


Open addressing needs a large table than separate chaining because all the data will be stored inside the hash table. There are 3 collision resolution techniques:

  1. Linear Probing
  2. Quadratic Probing
  3. Double Hashing

<<Previous - Open Hashing

Next - Linear Probing>>