A profile of that most of the permissions you cannot change is standard profiles. A profile is standard that have Custom Profile label unchecked after you open it. Standard profiles in Salesforce area unit default created with Force.com that cannot be renamed or deleted. Standard profiles which mostly used are:

  • System Administrator
  • Standard User
  • Read Only
  • Solution Manager
  • Marketing User
  • Contract Manager
BY Best Interview Question ON 23 Mar 2019