Oracle Database Administration and Development

You have just installed MySQL on Oracle Linux and adjusted your /etc/my.cnf parameters to suit your installation.
Examine the output:

What statement is true about the start attempt?

Examine these entries from the general query log:

All UPDATE statements reference existing rows.
Which describes the outcome of the sequence of statements?

Examine this command, which executes successfully:
$ mysqlrouter --bootstrap user@hostname:port --directory=directory_path
Which activity is performed?

You encountered an insufficient privilege error in the middle of a long transaction.
The database administrator is informed and immediately grants the required privilege:
GRANT UPDATE ON world.city TO ‘user1’;
How can you proceed with your transaction with the least interruption?

Examine these statements, which execute successfully:
CREATE ROLE r_world_rd;
GRANT SELECT ON world.* TO r_world_rd;
CREATE USER john IDENTIFIED BY ‘P@ssw0rd’;
GRANT r_world_rd TO john;
Examine these statements issued by user John:

What is the reason for the error?