# Quiz 24 #### What are the benefits of using Hierarchical Deterministic (HD) keys in wallets? * [x] They allow all keys to be derived from a single seed key * [x] They improve usability by requiring only one backup for the seed key * [ ] They prevent the use of private keys * [ ] They eliminate the need for public keys Notes to Learners Wallets use Hierarchical Deterministic (HD) keys: All keys are derived from a single seed key. The seed can be backed up once, instead of after every transaction. To learn more about it, you can follow the course [BSV and Digital Signatures](https://bsvblockchain.360learning.com/course/play/68de2a96a0926cd44a3f378d) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://hub.bsvblockchain.org/higher-learning/bsv-academy/bitcoin-primitives-digital-signatures/quiz/quiz-24.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.