Which data structure can store combinations of keys and values, allowing access by the key?

Which data structure can store combinations of keys and values, allowing access by the key?

• A. Array
• B. Vector
• C. Object
• D. Float

Answer: (C)

The correct answer is an object, as it is specifically designed to store combinations of keys and values, allowing easy access by the key. In programming languages like JavaScript, for instance, an object serves as a collection of key-value pairs, where each key is a unique identifier associated with a specific value. This design allows for efficient retrieval, manipulation, and organization of data, making it particularly useful in many applications where mapping relationships between keys and values is essential. In contrast, an array is primarily a list-like structure indexed by numerical indices, making it unsuitable for direct key-access without additional workarounds. A vector, while a dynamic array structure that allows for growth in size, also does not inherently support key-value pairing. Lastly, a float represents numeric values and cannot serve as a data structure for storing combinations of keys and values. Thus, an object is the most appropriate choice for this functionality.

The correct answer is an object, as it is specifically designed to store combinations of keys and values, allowing easy access by the key. In programming languages like JavaScript, for instance, an object serves as a collection of key-value pairs, where each key is a unique identifier associated with a specific value. This design allows for efficient retrieval, manipulation, and organization of data, making it particularly useful in many applications where mapping relationships between keys and values is essential.

In contrast, an array is primarily a list-like structure indexed by numerical indices, making it unsuitable for direct key-access without additional workarounds. A vector, while a dynamic array structure that allows for growth in size, also does not inherently support key-value pairing. Lastly, a float represents numeric values and cannot serve as a data structure for storing combinations of keys and values. Thus, an object is the most appropriate choice for this functionality.