What is the context of this question? (Security?) What do you mean with "mobile code" ( https://csrc.nist.gov/glossary/term/mobile_code)
I think the answer is NO.
There is no way for the Qlik Replicate engine to pick up, be provided with executable code by its environment (database connections).
The only way to provide code is through the development engine and the code would be static. Such code would be limited to data lookup/changes (aka 'transformation') or it could be pointers to (pre)processing scripts for certain data such as CSV files, backups to be restored, or network transfer scripts (as provided by the DB connectors).
Hein
