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  • Java Map interface represents the mapping between unique keys to values.
  • Map can not hold duplicate values.
  • In Map interface, Each key can map at most one value.
  • Each Map interface provides three different collection views. Using which you can view map's content as a set of keys, collection of values and set of key-value mappings.
  • Map will helps you when you wants to search, update or delete elements based on it's key.
  • The map interface is implemented by different java classes like HashTable, HashMap and TreeMap.

  • Hashtable Class implements Map, Cloneable and Serializable interfaces and also extends Dictionary class.
  • It maps keys to values in table format. Every key is linked to it's value.
  • In Hashtable, any object which is non null will be used as a key or it's value.
  • Initial capacity and load factor are two parameters of Hashtable that affect its performance.
  • Meaning of capacity is the number of buckets in Hashtable and Meaning of initial capacity is number of buckets in Hashtable at the time of its creation.
  • Load factor is parameter which measure how much full Hashtable is and when to increase it's capacity automatically.
  • In order to successfully retrieve and store object in Hashtable, the object which is used as key must implement the equals and the hashCode methods.

Hello everyone, today we are going to see what is race condition and how we can use race condition in Software and also we are going to see few examples to understand better.

What is race condition, we know that in a software the output that we get it depends on many events, if those events, those conditions are properly executed or properly run then only we get a proper output or as a proper expected output. But sometime what happens those events or are those conditions are not properly get executed or some of them may get skipped so that as a result we don't get a proper output as we expected, this is nothing but a race condition.