Hi I am a PADI Instructor and during my IE we were only required to perform 5 of the 20 basic skills in the exam plus teach 2 in confined water from any PADI Course (mine were from Rescue and Confined Dive 3 in the OW Course) and in the Open Water evaluation teach 2 skills from any course, mine were from the Search & Recovery Specialty and from the Rescue Course.
However the DM course requires you to perform all 20 skills perfectly.
Here is a quote from the performance requirement to score a perfect skill:
"Exercise performed correctly, slowly and with exaggerated movement appeared easy."
These are the 20 basic Skills
1. Equipment assembly, adjustment, preparation, donning and disassembly
2. Predive safety check (BWRAF)
3. Deep water entry
4. Buoyancy check at surface
5. Snorkel-regulator/regulator snorkel exchange
6. Five point descent
7. Regulator recovery and clearing
8. Mask removal, replacement and clearing
9. Air depletion exercise and alternate air source use stationary
10. Freeflow regulator breathing
11. Fin pivot (neutral buoyancy)
12. Five point ascent
13. Remove and replace weight system on the surface
14. Controlled Emergency Swimming Ascent (CESA)
15. Hovering motionless for 30 seconds
16. Underwater swim without a mask
17. Remove and replace weight system underwater
18. Remove and replace scuba unit underwater
19. Remove and replace scuba unit on the surface
20. Buddy breathing stationary and swimming (donor and receiver)
I hope this helps you. BTW are you looking for this information with the intention of going PRO?