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

2. Connection strings in FEDERATED tables are stored...

A) They are not stored, but must be re-specified at server restart.
B) Within the table definition.
C) In variables.
D) In a .fed file corresponding to the table.

3. It is important to analyze queries that involve joins with EXPLAIN because...

A) Joins have the potential to cause more server processing if not defined correctly.
B) Joins are more prone to mistakes.
C) Using EXPLAIN before executing the query helps the server prepare the statements used.

4. The type of file system you chose may affect MySQL use and/or performance with regard to... (Choose three)

A) Size limits of files.
B) Time to recover from a crash.
C) The type of storage engines that can be used.
D) Table opening time.
E) The number of users MySQL can handle.

5. Which of the following steps are used to create database symbolic links on Windows? (Choose four)

A) Restart the server.
B) Stop the server.
C) Create a file in the data directory with the database name with an extension of .sym that contains the full path to the new location.
D) Use the ln -s command.
E) Move the database directory from the data directory to a new location.
F) Update your my.ini with the path to the new location.

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