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Which of the following data structure stores items in ‘key-value’ pairs?
- AStack
- BQueue
- CHashMap
- DLinked List
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Java HashMap is a hash table-based implementation of Java’s Map interface.
It is a collection of key-value pairs. It maps keys to values.
A HashMap cannot contain duplicate keys.
Java HashMap allows null values and the null key.
It is a collection of key-value pairs. It maps keys to values.
A HashMap cannot contain duplicate keys.
Java HashMap allows null values and the null key.