Apache Accumulo now has a hands-on tour that introduces users to key Accumulo concepts by completing a series of programming exercises. Don't worry! Solutions are provided if you get stuck.
The tour has a ‘Getting Started’ page that helps you set up your development environment and clone a repository with template code. After you are set up, the tour has exercises that cover the following Accumulo concepts:
More exercises (such as one on Accumulo Iterators) will be added in the future so check for updates.