Are there sample coding challenges/code I can see

You can see our coding challenges here -> https://www.geektrust.in/coding-problem

We don't have sample code for you to take a look at. However we have a lot of code snippets in our section on earning badges -> https://help.geektrust.in/category/7-badges

Also a caution: Don't submit plagiarised code. We have a pretty good plagiarism check, and if caught, you face a life ban.