Correct Answer : new_link
Explanation : new_link : This optional parameter specifies that on a second call to mysql_connect() with identical arguments, rather than a new connection, the identifier of the current connection will be returned.
Correct Answer : 5
Explanation : This section introduces you to the most commonly used MariaDB aggregate functions including avg(), count(), max(), min(), and sum().
avg(), count(), max(), min(),
sum()
Correct Answer : All of the above
Correct Answer : MySQL