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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. Consider the following EXPLAIN of a simple Join:
mysql> EXPLAIN SELECT CountryList.Name, CityList.Name, CityList.Population
-> FROM CountryList JOIN CityList ON CountryList.Code = CityList.Country
-> WHERE CityList.Population > 8000000 *************************** 1. row *************************** id: 1 select_type: SIMPLE table: CountryList type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 239 Extra: *************************** 2. row *************************** id: 1 select_type: SIMPLE table: CityList type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 4079 Extra:
Using where How many rows need to be examined to perform the join?

A) 974881, the product of both numbers
B) 2159, the average of both numbers
C) 4318, the sum of both numbers
D) 239, the number of rows in the first table
E) 4079, the number of rows in the second table

3. What should you do in order to enhance the security of a standard MySQL installation on Unixtype operating systems?

A) Nothing; by default the security level of a MySQL installation is very high
B) Disable the mysql_access program
C) Run the mysql_secure_installation script

4. How can stored routines be used to check for constraints or legality

A) They can check and only perform an action if the incoming values match a specified value.
B) They can make use of the VALIDATE DEFINER setting.
C) They cannot be used to check for constraints or legality of data.

5. Which factors can be considered in a stored routine to allow or disallow access or modification of data? (Choose two)

A) The current date and time
B) The identity of the client user
C) The CPU load of the system
D) The number of current connections

Solutions: