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MYSQL MySQL 5.0 Database Administrator Certified Professional Exam, Part II Sample Questions:

1. Why should you be selective when granting the PROCESS privilege to an account?

A) Because it allows for the use of the SHOW PROCESSLIST command, which can expose data.
B) Because it allows the client to control running processes on the server.
C) Because it allows for the use of stored routines.
D) Because it allows the client to process scripts.

2. Consider the following:
mysql> EXPLAIN SELECT * FROM City WHERE Name = 'Jacksonville' AND CountryCode =
'USA'
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: City
type: ref
possible_keys: name_country_index
key: name_country_index
key_len: 13
ref: const,const
rows: 1
Extra: Using where
Which of thefollowing best describes the meaning of the value for the key_len column?

A) It shows how big the indexes are.
B) It shows how many results will be returned.
C) It shows how many bytes will be used from index rows.
D) It shows how many columns are examined.

3. Does max_connections have an affect on the number of slaves that may connect to a master?

A) No, because slaves do not use the same type of connection as a regular client.
B) No, because slaves are not really clients.
C) Yes, because if the server has too many connections, it may slow the slaves down.
D) Yes, because each slave is effectively a connected user.

4. Which of the following is/are required on the master server for replication to work?

A) Tell the master which slaves to connect to.
B) Issue the START MASTER command.
C) Binary logging must be turned on.
D) Make a backup of all databases to be replicated.

5. Given the result of the following query:
mysql> SELECT Host, User FROM mysql.user WHERE User='joe';
+-------------+------+
| Host | User |
+-------------+------+ | % | joe |
| example.com | joe |
+-------------+------+
2 rows in set (0.00 sec)
A client connection is established with the username joe from the host example.com. Assuming that the login is successful, which of the entries shown in the mysql.user table are used to authenticate the client connection for subsequent query executions, and why?

A) For every query, the 'joe'@'%' account is checked first. If that does not have the proper permissions, 'joe'@'example.com' will be used as MySQL will check all relevant accounts, with the most general hostname first.
B) The 'joe'@'example.com' account is used for all authentication, as MySQL will always use the most specific hostname possible.
C) The 'joe'@'%' account is used for all authentication, as MySQL will always use the most general host name possible.
D) For every query, the 'joe'@'example.com' account is checked first. If that does not have the proper permissions, 'joe'@'%' will be used as MySQL will check all relevant accounts, with the most specific hostname first.

Solutions: