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

1. Consider the following: mysql> EXPLAIN SELECT * FROM City WHERE CountryCode = 'USA' *************************** 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 where
Which of the following best describes the meaning of the "id" column in the output from EXPLAIN?

A) It is just an incremental number to identify the rows from the output.
B) Which SELECT the row refers to.
C) Which process it is running as.

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 a .fed file corresponding to the table.
D) In variables.

3. What kind of replication is supported by the MySQL server?

A) Single file based clustering
B) MySQL doesn't support replication
C) Multiple-master replication
D) Master to slave replication

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

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

A) Update your my.ini with the path to the new location.
B) Stop the server.
C) Use the ln -s command.
D) Restart the server.
E) Move the database directory from the data directory to a new location.
F) 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.

Solutions: