Sales force interview questions :

SOQL to find code coverage in Salesforce

SELECT ApexClassOrTrigger.Name, NumLinesCovered, NumLinesUncovered FROM ApexCodeCoverageAggregate ORDER BY ApexClassOrTrigger.Name ASC

Hard Delete

Using Hard Delete operation, we can delete existing records from our Salesforce organization permanently. Deleted records will not be available in Recycle Bin. “Bulk API Hard Delete” check box should be enabled in user profile for permanently deleting the records.

  How to fetch Contact details from Opportunity using SOQL in Salesforce?

SELECT Id, Opportunity.Name, Opportunity.OrderNumber__c, Opportunity.Approval_Status__c, Contact.Email, Contact.Name FROM OpportunityContactRole