---
auto_validation: true
time: 10
author_name: Devtoberfest Planner
author_profile: https://developers.sap.com/devtoberfest
tags: [ tutorial>beginner, topic>cloud ]
primary_tag: topic>cloud
parser: v2
slug: devtoberfest2026-cap-week2-validation
canonical_url: https://developers.sap.com/tutorials/devtoberfest2026-cap-week2-validation
---
# 🟠 Devtoberfest 2026 - Week 2 - Validation Tutorial - Building Apps Week 2

<!-- description --> This is the validation tutorial so you can get Devtoberfest points for watching the 🟠 Building Apps sessions for week 2.

## You will learn

- A lot about technology and yourself during Devtoberfest

## Intro

This tutorial is part of our yearly and wonderful **Devtoberfest**, a month-long event filled with learning, fun, challenges, and prizes -- for developers by developers.

![Devtoberfest](devtoberfest.jpg)

For more info on Devtoberfest, see our [Devtoberfest page](https://developers.sap.com/devtoberfest).

### Question 1 - 🟠 Custom Business Logic Extensibility in CAP (CDS-Oyster)

<div>&nbsp;</div><iframe width="560" height="315" src="https://www.youtube.com/embed/bnsi7Ckzp2s" frameborder="0" allowfullscreen></iframe>

### Question 2 - 🟠 What's in Daniel Hutzel's brain?

<div>&nbsp;</div><iframe width="560" height="315" src="https://www.youtube.com/embed/mBAY16nzNMc" frameborder="0" allowfullscreen></iframe>

### Question 3 - 🟠 DRY CAP - Making Sustainable Solutions Through Plugins

<div>&nbsp;</div><iframe width="560" height="315" src="https://www.youtube.com/embed/3yjKYUtRWHs" frameborder="0" allowfullscreen></iframe>

### Question 4 - 🟠 From prompt to productivity: Building AI-powered cross-platform Mobile apps with Mobile Development Kit (MDK)

<div>&nbsp;</div><iframe width="560" height="315" src="https://www.youtube.com/embed/KnHSfPl89vs" frameborder="0" allowfullscreen></iframe>