what is a full stack code example

Example 1: example of full stack

1. create a data (a customer account) on UI
2. send request from API and verify data is 
matching with UI (you reach your database
through API, it is credible as much as 
your API software is credible)
3. send SQL queries using JDBC get request
to database and verify data is
matching with post request

Example 2: full stack

two general fields that make up a full-stack developer’s skillset: 
front-end development and back-end development.