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

1. Which key buffers are available for MyISAM tables?

A) An optional table-specific key buffer that can be assigned to single MyISAM tables.
B) A global key buffer that keeps index information for all MyISAM tables.
C) An optional column-specific key buffer that can be assigned to a single column of a MyISAM table.

2. In replication the master server logs updates to this/these databases by default:

A) Mysql DB
B) NO DB
C) All DB
D) all DB but mysql
E) Default DB

3. Which of the following statements about MEMORY tables are true? (Choose two)

A) Creating many MEMORY tables should be avoided.
B) It is OK to store large amounts of data in MEMORY tables.
C) The number of MEMORY tables on a server will not cause any performance problems.
D) MEMORY tables should not be used to store large amounts of data.

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

5. In which ways can you set the query_cache_type option? (Choose three)

A) You can set it at runtime for the entire server with the following statement: SET GLOBAL query_cache_type=[0|1|2]
B) You can set it at runtime for the current connection with the following statement: SET SESSION query_cache_type=[0|1|2]
C) You can set it in the configuration file and restart the server.

Solutions: