Are Open Addressing in Hash Tables only useful for searching ? How do the elements get into the HashTable in the very first place?

Question

From Wikipedia link on Open Addressing :

Open addressing, or closed hashing, is a method of collision resolution in hash tables. With this method a hash

Answer 1

I am a bit late to the party but it the term closed hashing refers to the fact that the items are 'closed', that is contained within the hash tables array, they are not stored externally like with chaining (also confusingly called Open Hashing).

Open addressing is used with insertion as well as for searching if you read page 270 of CLRS it is described there.