Final answer:
Tokens created from event data are stored in appropriate data structures, which may vary depending on their use-case, such as symbol tables in compiler design, distributed ledgers in blockchain, or secure databases and client-side storage for authentication tokens in web applications.
Step-by-step explanation:
When tokens are created from event data, particularly in the context of computer systems and programming, they are typically stored in data structures like arrays, lists, databases, or other storage mechanisms that allow for efficient retrieval and manipulation. For instance, if you are dealing with a parser in compiler design, tokens generated from a source code are often stored in a symbol table. This symbol table is a data structure that holds information about the scope, type, and other necessary attributes related to each token. In the context of blockchain technology, tokens generated from smart contract events are stored on the blockchain itself, and their corresponding transaction details get recorded in a distributed ledger. In web development, authentication tokens such as those used in sessions or generated by OAuth procedures are stored in secure data stores, which could be server-side databases or client-side cookies or storage, depending on the implementation and security requirements.