Database role access level issues in sql server.

If you create one login named as 'kumar' and map the login to the user 'kumar' in the 'test' database.

Let us see below scenario.

1.First i gave db_datareader role for that login 'kumar' ,then try to execute below queries.

Let us see what will happen.

To resolve above error ,what role needs to give for 'kumar' login?

db_datawriter.

To resolve above error ,what role needs to give for 'kumar' login?

db_ddladmin and to resolve below by giving db_backupoperator