> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-eb-mini-app-ia-overhaul.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Exercise Contracts

> A list of verified unit test contracts for Base Learn exercises.

Many of the sections in Base Learn contain an exercise to test your knowledge on the material you have just completed. We tell you **what** to do, but not **how** to do it. You have to apply your knowledge and demonstrate the new abilities you have earned.

Upon success, you'll be granted a non-transferable, or soulbound, NFT as a memento of your learning. You can track your progress on the \[progress page].

Below is a list of the exercises, with links to view their code. The unit tests are written in a bespoke framework in Solidity, but the patterns should be recognizable to most engineers.

| Exercise                                                                              | Code                                                                                                                                      |
| :------------------------------------------------------------------------------------ | :---------------------------------------------------------------------------------------------------------------------------------------- |
| [Deploying to a Testnet](/learn/deployment-to-testnet/deployment-to-testnet-exercise) | [0x075eB9Dc52177Aa3492E1D26f0fDE3d729625d2F](https://sepolia.basescan.org/address/0x075eb9dc52177aa3492e1d26f0fde3d729625d2f#code#F16#L1) |
| [Control Structures](/learn/control-structures/control-structures-exercise)           | [0xF4D953A3976F392aA5509612DEfF395983f22a84](https://sepolia.basescan.org/address/0xf4d953a3976f392aa5509612deff395983f22a84#code#F17#L1) |
| [Storage](/learn/storage/storage-exercise)                                            | [0x567452C6638c0D2D9778C20a3D59749FDCaa7aB3](https://sepolia.basescan.org/address/0x567452c6638c0d2d9778c20a3d59749fdcaa7ab3#code#F17#L1) |
| [Arrays](/learn/arrays/arrays-exercise)                                               | [0x5B0F80cA6f5bD60Cc3b64F0377f336B2B2A56CdF](https://sepolia.basescan.org/address/0x5b0f80ca6f5bd60cc3b64f0377f336b2b2a56cdf)             |
| [Mappings](/learn/mappings/mappings-exercise)                                         | [0xD32E3ACe3272e2037003Ca54CA7E5676f9b8D06C](https://sepolia.basescan.org/address/0xd32e3ace3272e2037003ca54ca7e5676f9b8d06c#code#F17#L1) |
| [Structs](/learn/structs/structs-exercise)                                            | [0x9eB1Fa4cD9bd29ca2C8e72217a642811c1F6176d](https://sepolia.basescan.org/address/0x9eb1fa4cd9bd29ca2c8e72217a642811c1f6176d#code#F17#L1) |
| [Inheritance](/learn/inheritance/inheritance-exercise)                                | [0xF90dA05e77a33Fe6D64bc2Df84e7dd0069A2111C](https://sepolia.basescan.org/address/0xF90dA05e77a33Fe6D64bc2Df84e7dd0069A2111C#code#F17#L1) |
| [Imports](/learn/imports/imports-exercise)                                            | [0x8dD188Ec36084D59948F90213AFCd04429E33c0c](https://sepolia.basescan.org/address/0x8dd188ec36084d59948f90213afcd04429e33c0c#code#F17#L1) |
| [Errors](/learn/error-triage/error-triage-exercise)                                   | [0xC1BD0d9A8863f2318001BC5024c7f5F58a2236F7](https://sepolia.basescan.org/address/0xc1bd0d9a8863f2318001bc5024c7f5f58a2236f7#code#F17#L1) |
| [The "new" Keyword](/learn/new-keyword/new-keyword-exercise)                          | [0x4f21e69d0CDE8C21cF82a6b37Dda5444716AFA46](https://sepolia.basescan.org/address/0x4f21e69d0cde8c21cf82a6b37dda5444716afa46#code#F17#L1) |
| [Minimal Tokens](/learn/token-development/minimal-tokens/minimal-tokens-exercise)     | [0x10Ce928030E136EcC74d4a4416Db9b533e3c694D](https://sepolia.basescan.org/address/0x10ce928030e136ecc74d4a4416db9b533e3c694d#code#F17#L1) |
| [ERC-20 Tokens](/learn/token-development/erc-20-token/erc-20-exercise)                | [0x4F333c49B820013e5E6Fe86634DC4Da88039CE50](https://sepolia.basescan.org/address/0x4f333c49b820013e5e6fe86634dc4da88039ce50#code#F21#L1) |
| [ERC-721 Tokens](/learn/token-development/erc-721-token/erc-721-exercise)             | [0x15534ED3d1dBA55148695B2Ba4164F147E47a10c](https://sepolia.basescan.org/address/0x15534ed3d1dba55148695b2ba4164f147e47a10c#code#F18#L1) |