OLTP is known for MAINTAINING transactional level data of the organization and generally, they are highly normalized. If it is OLTP route then it is GOING to be a star schema DESIGN.
OLAP stands for Online Analytical process system.
OLAP is known for a lot of ANALYSIS and fulfills reporting purposes. It is de-normalized form.
If it is an OLAP route then it is going to be a snowflake schema design.