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

1. Can multi-column FULLTEXT indexes be used? If so, when?

A) Yes, they should be used to search multiple columns simultaneously.
B) No, they can not be used.
C) Yes, they can be used to search either one or all of the indexed columns.

2. Consider the following:
mysql> EXPLAIN SELECT * FROM City WHERE Name = 'Jacksonville' AND CountryCode =
'USA'
*************************** 1. row ***************************
id: 1
select_type: SIMPLE
table: City
type: ref
possible_keys: name_country_index
key: name_country_index
key_len: 13
ref: const,const
rows: 1
Extra: Using where
Which of thefollowing best describes the meaning of the value for the key_len column?

A) It shows how many bytes will be used from index rows.
B) It shows how big the indexes are.
C) It shows how many columns are examined.
D) It shows how many results will be returned.

3. Which of the following best describes what may limit the number of simultaneous connections to the server? What are possible ways to increase it? (Choose two)

A) The maximum number of threads per-process of the operating system.
B) The --key_cache option may be used to increase the limit.
C) The operating system may be able to be reconfigured to increase this limit.
D) It is limited by the maximum size of the table cache.

4. Why should log files be secured against reading by non-authorized users? (Choose two)

A) Data values may be read
B) Usernames and passwords could be revealed.
C) The server may be prevented from writing to the log file
D) Unauthorized users may alter the log contents.

5. Which of the following best describes the purpose of the record buffer (as controlled through the read_buffer_size variable), and how it is set? (Choose two)

A) The record buffer is set per connection.
B) The record buffer is used for operations such as ORDER BY or GROUP BY.
C) The record buffer is used to perform sequential table scans, reducing the number of reads from disk
D) The record buffer is global and is only set by restarting the server.

Solutions: