Default Collecting user preferences at installation

When the user installs the app, and says "Open", in my app I want to ask 3 questions to understand users' preferences, and to serve content based on these preferences thereafter. I can successfully do it one question per page...so for 1st question, I ask them to select one option (radio buttons), 2nd question is more freeform (text) and the 3rd question basically needs to have such that user can select multiple options from available options...I was thinking of using checkboxes, but am kinda stuck. Please help!