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Java - Test Questions on 'Coupang' - 2 questions found


Which of the following is false ?Core Java
HashMap came before HashTable.
HashMap allows null values whereas Hashtable doesn’t allow null values.
HashTable and HashMap allow Key-Value pairs.
Hashtable is synchronized whereas HashMap is not.

  map  hashmap  hashtable  collection  java

Which of the collections allows null as the key ?Core Java
HashTable
HashMap
TreeMap
LinkedHashMap

  java  collections  map







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