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

1. Which of the following best describes the purpose of the max_allowed_packet parmeter, and when it is set? (Choose two)

A) The max_allowed_packet parameter is set per-connection.
B) The max_allowed_packet parameter is global and is only set by shutting down the server.
C) The max_allowed_packet parameter is used to control the size of the dataset that is sent to the client.
D) The max_allowed_packet parameter is used to control the buffer that is used for communication between the server and the client.

2. 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 process it is running as.
C) Which SELECT the row refers to.

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

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

4. 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) Run the mysql_secure_installation script
C) Disable the mysql_access program

5. Consider the following EXPLAIN output. mysql> EXPLAIN SELECT Name FROM City WHERE Population > 8000000 *************************** 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 statements are true? (Choose three)

A) All 4079 rows of the table need to examined.
B) The Name column should be indexed.
C) The query cannot be optimized any better.
D) No index could be used to perform the query.
E) The Population column should be indexed.

Solutions: