A.world.City.CountryCode is used to sort the rows in the City table.

B.world.City.CountryCode is used as the primary key for the Country table.

C.No indexed columns are used to select rows from the City table. The world.City.CountryCode column is used to select rows in the Country table.

D.No indexed columns are used to select rows from the Country table. The world.City.CountryCode column is used to select rows in the City table.

A.There is a redundant index on the dept_no column.

B.There is a redundant index on the emp_no column.

C.The selectivity of the dept_no column is the best of the indexed columns.

D.There are three indexes on the table.

E.The values on the emp_no column must be unique.

F.The secondary indexes are optimized for unique key look-ups.

A.whether there are any indexes on the tables that you are querying

B.whether there are any indexes in your query

C.if there are any indexes that may be used to solve this query

D.if it is possible for you to include any indexes in your query

A.The validate_password plug-in has not been loaded.

B.The name of the dictionary file is too obvious.

C.validate_password_policy cannot be set without restarting the MySQL instance.

D.The dictionary file word list is too short.

E.validate_password_dictionary_file cannot be set without restarting the MySQL instance.

F.The dictionary file is in an insecure location.

A.Use one-way encryption for storage of passwords.

B.Store passwords external to the database.

C.Choose short passwords to save on storage space.

D.Use simple keyboard actions that give mixed letters.

E.Do not use dictionary-based words.