as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
what type of data structure could be used to store a list of phone numbers and their owners?
user
a hash map or associative array can be used to store a list of phone numbers and their owners. a key/value pair would be used to store a phone number as the key and an associated owner as the value. an array could also be used to store the data, with a separate slot for each owner and phone number.
assistant