From Commission Regulation (EU) No 1178/2011:
FCL.310 CPL — Theoretical knowledge examinations
An applicant for a CPL shall demonstrate a level of knowledge appropriate to the privileges granted in the following subjects:
— Air Law,
— Aircraft General Knowledge — Airframe/Systems/Powerplant,
— Aircraft General Knowledge — Instrumentation,
— Mass and Balance,
— Performance,
— Flight Planning and Monitoring,
— Human Performance,
— Meteorology,
— General Navigation,
— Radio Navigation,
— Operational Procedures,
— Principles of Flight,
— Visual Flight Rules (VFR) Communications
These are separate papers.
Be aware, however, that obtaining passes in the CPL subjects listed above will not be sufficient to fulfil the requirements for obtaining an instrument rating nor an ATPL. If you have ambitions towards the airlines, you will require ATPL and IR theoretical knowledge, the requirements of which can be seen at
FCL.515 and FCL.615 respectively.