# Assessment 1 #### What's the difference between OP\_PICK and OP\_ROLL? * [ ] OP\_PICK moves items, OP\_ROLL copies them * [x] OP\_PICK copies items, OP\_ROLL moves them * [ ] They do the same thing * [ ] OP\_PICK works with pairs, OP\_ROLL works with single items --- # 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/bsv-opcodes/stack-operations/assessment-1.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.