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

1. Consider the following: mysql> EXPLAIN SELECT Name FROM Country WHERE Population BETWEEN 1 AND 10000 *************************** 1. row *************************** id: 1 select_type: SIMPLE table: Country type: range possible_keys: i_pop key: i_pop key_len: 4 ref: NULL rows: 10 Extra: Using where
What is the meaning of the range value of the type column?

A) The index is used to select rows that fall between a range of index values.
B) The optimizer has determined that only data from the very beginning or the very end of the table is needed
C) The type of index uses the range algorithm.
D) There is a range of indexes that can be used.

2. Is it ever safe to start the MySQL server as root?

A) No it is never safe to start it as root.
B) Yes it is always safe to start it as root.
C) No because you can not make it switch the effective user if started as root.
D) Yes provided you make it switch the effective user to mysql.

3. Which of the following statements are true?

A) A MERGE table may span across compressed and uncompressed tables.
B) A MERGE table cannot be used with compressed tables.
C) A MERGE table can only be a collection of either compressed or uncompressed tables.

4. Which of the following best describe the effects on performance for the dynamic-row format for
MyISAM has? (Choose two)

A) Retrievals are more complex and slower.
B) Retrievals are less complex and are faster.
C) Rows generally take up more disk space than fixed-row format.
D) Rows generally take up less disk space than fixed-row format.

5. What are reasons to prefer using GRANT and REVOKE statements over editing the privilege tables directly? (Choose three)

A) All grant tables in memory are immediately updated on GRANT and REVOKE
B) Making changes directly to the grant tables, one must remember to execute flush privileges to make the changes take effect
C) None of the above
D) GRANT and REVOKE statements allow you to do more fine-grained tuning of user privileges than does editing the grant tables directly.
E) Using GRANT and REVOKE allows the server to figure out the right tables and do all the appropriate work

Solutions: