| Platform Name | CodeCheck |
| Exercise Type | Code Completion |
| Language | Python |
| Description | Given four numbers a, b, c, d, return true if exactly two of them are the same. |
| Keywords | , |
| URL | https://codecheck.io/files/horstmann/codecheck-python-FunctionsWithDecisions-6 |
| Author | Cay Horstmann |
| Institution | San José State University |
| Iframe URL | https://codecheck.io/files/horstmann/codecheck-python-FunctionsWithDecisions-6 |
| LTI URL | https://codecheck.io/files/horstmann/codecheck-python-FunctionsWithDecisions-6 |
| LTI Instructions URL | https://horstmann.com/codecheck/lti.html |