Explain in process verses out of process component

Question

Explain in process verses out of process component.

Answer 1

An in-process component is implemented like a DLL, and runs into the same process space like its client app, enabling the most capable communication in between component and client. Each client app which uses the component starts a new case of this. An out of process component is implemented like an EXE, and not like a dll, runs within its own process space.

Like a result, exe’s are slower then dll’s since communications among client and component should be marshalled across process boundaries. A single case of an out of process component can service several clients.