# Quiz 21

What is the first step in the SHA-256 input and preprocessing phase?

**Type all answers and select the correct one**

* [x] Representing the input as an array of bytes
* [ ] Adding padding bits
* [ ] Constructing the message schedule
* [ ] Initializing working variables<br>

**Note to Learners**

"In our GoLang implementation which is a command-line-interface (CLI) program, we can simply take in some input as a string and then represent that input as an array of bytes."<br>

To learn more about it, you can follow the course [Walkthrough Implementation of SHA-256 in Golang](https://bsvblockchain.360learning.com/course/play/68bac07ee4056be2a5dd1108)


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