The __________ is a collection that stores key-value pairs.a.)Arrayb.)HashMapc.)HashSetd.)ArrayList
Question
The __________ is a collection that stores key-value pairs.
a.) Array
b.) HashMap
c.) HashSet
d.) ArrayList
Solution
The correct answer is: b.) HashMap
Explanation
A HashMap is a data structure in Java that allows for the storage of key-value pairs. Each key is unique and is used to retrieve its corresponding value. This structure provides efficient access and manipulation of data, making it a popular choice for implementing associative arrays.
- Arrays are indexed collections of elements but don't store key-value pairs.
- HashSets are used for storing unique elements but do not associate keys with values.
- ArrayLists are dynamic arrays that can resize but do not provide key-value mappings.
Hence, among the options provided, HashMap is the collection that specifically stores key-value pairs.
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