What is the potential exception that can be thrown from this SOQL query: Account a = [SELECT Id, (SELECT Id FROM Contacts) FROM Account] Choose 2 answers

Which of the following standard fields are indexed? (Choose three.)

A company has code to update a Request and Request Lines and make a callout to their external ERP system's REST endpoint with the updated records.

The CalloutUtil. makeRestCallout fails with a 'You have uncommitted work pending. Please commit or rollback before calling out' error. What should be done to address the problem?

Which statement is true about using ConnectApi namespace (also called Chatter in Apex)? (Choose two.)

A Visualforce Page throws an Attempt to dereference a null object error for a Contact. What change In the controller will fix the error?