Custom fields allowed per object depend upon the Salesforce edition which we are using.

There are different editions -

  • In Personal Edition you are allowed to create 5 custom fields per object.
  • Group, Essential, and Professional Edition allows a user to create 100 fields.
  • In Enterprise and Developer Edition users are allowed to create 500 custom fields per object.
  • Unlimited and Performance Edition gives you an allowance of 800 custom fields.

Beyond 800 custom fields, users are restricted to some objects like Account, Asset, Campaign, Contact, Opportunity, etc.

BY Best Interview Question ON 29 Mar 2022