Which collection is used to map keys to values, ensuring key uniqueness?

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Multiple Choice

Which collection is used to map keys to values, ensuring key uniqueness?

This question hinges on mapping keys to values with unique keys. A Map is designed to store pairs where each key identifies a value, and no two entries share the same key, which makes lookups by key fast and unambiguous. A List is just an ordered collection that can include duplicates and has no direct key-to-value relation. A Set ensures unique elements but doesn’t map keys to values. A Queue focuses on processing order (FIFO) and also doesn’t provide key-value associations. So, a Map best fits the requirement of mapping keys to values with key uniqueness.

This question hinges on mapping keys to values with unique keys. A Map is designed to store pairs where each key identifies a value, and no two entries share the same key, which makes lookups by key fast and unambiguous. A List is just an ordered collection that can include duplicates and has no direct key-to-value relation. A Set ensures unique elements but doesn’t map keys to values. A Queue focuses on processing order (FIFO) and also doesn’t provide key-value associations. So, a Map best fits the requirement of mapping keys to values with key uniqueness.

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