What are the different types of locks?

There are five kinds of locks on repository objects:
Read lock: Created when you open a repository object in a folder for which you do not have write permission. Also created when you open an object with an existing write lock.
Write lock: Created when you create or edit a repository object in a folder for which you have write permission.
 Execute lock: Created when you start a session or batch, or when the Informatica Server starts a scheduled session or batch.
Fetch lock: Created when the repository reads information about repository objects from the database.
Save lock: Created when you save information to the repository.