Java - Online Test - Deprecate - javasearch.buggybread.com


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Java - Test Questions on 'Deprecate' - 3 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
Which keyword is used to provide explicit access of a code block to single thread ?Core Java
Transient
Final
Explicit
Synchronized

  java  threads  multithreading


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