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| Ans. No HashMap isn't synchronized. ConcurrentHashMap and Hashtable are synchronized. | ||||
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 Discuss Correct / Improve  hashmap synchronization | ||||
 Related Questions | ||||
 Difference between TreeMap and HashMap ? | ||||
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| What is a ConcurrentHashMap ? | ||||
| Why HashTable has been deprecated ? | ||||
| Can we use null as a key for a map collection ? | ||||
| Which of the following collections stores its elements in insertion Order ? a. HashMap b. TreeMap c. LinkedHashMap d. LinkedMap | ||||
| Difference between Map and HashMap ? | ||||
| Can we add duplicate keys in a HashMap ? What will happen if we attempt to add duplicate values ? | ||||
