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

1. Which of the following best describes what you might expect after disabling InnoDB at run time?

A) It will disable InnoDBs associated memory buffers and data structures, which will save memory.
B) It will still enable InnoDBs associated memory buffers and data structures, however it will save memory.
C) It will disable InnoDBs associated memory buffers and data structures, however it will not save any memory.

2. Why should log files be secured against reading by non-authorized users? (Choose two)

A) The server may be prevented from writing to the log file
B) Unauthorized users may alter the log contents.
C) Data values may be read
D) Usernames and passwords could be revealed.

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

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

4. Which of the following best describes the purpose of the max_allowed_packet parmeter, and when it is set? (Choose two)

A) The max_allowed_packet parameter is set per-connection.
B) The max_allowed_packet parameter is used to control the size of the dataset that is sent to the client.
C) The max_allowed_packet parameter is used to control the buffer that is used for communication between the server and the client.
D) The max_allowed_packet parameter is global and is only set by shutting down the server.

5. Consider the following: mysql> EXPLAIN SELECT DISTINCT City.id,City.name -> FROM City,Country -> WHERE Country.Name IN ('United States','Canada','Mexico') -> AND City.CountryCode=Country.Code -> ORDER BY name *************************** 1. row *************************** id: 1 select_type: SIMPLE table: City type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 4079 Extra: Using temporary; Using filesort *************************** 2. row *************************** id: 1 select_type: SIMPLE table: Country type: eq_ref possible_keys: PRIMARY key: PRIMARY
key_len: 3
ref: world.City.CountryCode
rows: 1
Extra: Using where;
Distinct
Which of the following best describes the meaning of the values in the ref columns?

A) City.CountryCode is used to sort what rows are returned from the City table.
B) No indexed columns are used to choose rows from City and the City.CountryCode column is used to reference rows in the Country table.
C) No index columns are used to choose rows from Country and the City.CountryCode column is used to reference rows in the City table.

Solutions: