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Question: Define Hash table?
Answer: Hash tables are good for doing a quick search on things.
For instance if we have an array full of data (say 100 items).If we knew the position that a specific item is stored in an array, then we could quickly access it. For instance, we just happen to know that the item we want it is at position 3; I can apply:
There are many different hash functions. Some hash functions will take an integer key and turn it into an index. A common one is the division method.
Question: Define Hash table?
Hash tables are good for doing a quick search on things.
HashTable is one of the implementations of Collections frame work and it implements Map interface.There are two main factors of HashTable one is initial capacity & load factor. We can pass these two parameter while creation of Hash table other wise it will create the same by asigning default values (i.e 11 & 0.75 respectively).
Hashtable is a collection object ,is Synchronozed and it does not allow duplicate values but it allows null values. Source: CoolInterview.comAnswered by: Pavan Kumar Karicheti | Date: 3/11/2008 | Contact Pavan Kumar Karicheti
Defn: It is a data structure that associates keys with values. The primary operation it supports efficiently is a lookup: given a key (e.g. a person's name), find the corresponding value (e.g. that person's telephone number). It works by transforming the key using a hash function into a hash, a number that is used as an index in an array to locate the desired location ("bucket") where the values should be.
Like Vector, Hashtable has been in from prehistoric Java times. For
Hashtable implements Map interface which is a collection of objects from where you can retrieve those objects with the help of key and value pair. Source: CoolInterview.comAnswered by: ramya | Date: 4/14/2008 | Contact ramya
HashTable is just like Hash Map,Collection having key(Unique),value pairs.
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