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

1. 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) The 'joe'@'example.com' account is used for all authentication, as MySQL will always use the most specific hostname possible.
B) 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.
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.

2. Can you have several MySQL servers running on the same computer, using the same InnoDB
tablespace files?

A) Yes, always
B) Yes, provided their permissions are set to read-only
C) No

3. Consider the following:
mysql> SHOW STATUS LIKE 'Qcache%'; +-------------------------+--------+ | Variable_name | Value | +-------------------------+--------+ | Qcache_free_blocks | 87 | | Qcache_free_memory | 318442 | | Qcache_hits | 11224 | | Qcache_inserts | 19215 | | Qcache_lowmem_prunes | 437 | | Qcache_not_cached | 9155 | | Qcache_queries_in_cache | 240 | | Qcache_total_blocks | 924 | +-------------------------+--------+
What can be derived from this output?

A) There is a low utilization of the query cache.
B) There is a normal utilization of the query cache.
C) There is a high utilization of the query cache.

4. Consider the following query: GRANT ALL ON world.* TO 'web'@'hostname' What privileges would this give this user?

A) ALL cannot be used when granting privileges.
B) All privileges except GRANT.
C) All privileges including GRANT.
D) SELECT, INSERT, UPDATE and DELETE.

5. Which of the following statements best describe the indexes supported by the MEMORY storage engine, and their general characteristics?

A) MEMORY tables only support BTREE which provide better performance with non-unique index values and other comparison operators.
B) MEMORY tables support HASH indexes which provide fast lookups that use a unique index, and BTREE indexes which provide better performance with non-unique index values and other comparison operators.
C) MEMORY tables support HASH indexes which provide better performance with non-unique index values and other comparison operators, and BTREE indexes which provide fast lookups that use a unique index.
D) MEMORY tables only support HASH indexes which provide fast lookups that use a unique index.

Solutions:

Question # 1 Answer: A

Question # 2 Answer: C

Question # 3 Answer: A

Question # 4 Answer: B

Question # 5 Answer: B