Appistoki interview questions

Tell me about yourself. What is Salesforce? Tell me the difference between role and profile. What are Permission sets. What are Workflow rules and process builder? Which one is better? What can be done in workflow but not in process builder? Approval process? Write an apex trigger- only 3 accounts should be there, if we add 4th account, 1 st account should be deleted Write a flow- display first 10 opportunity names. Write a simple SOQL query