Oracle MySQL 5.0 Database Administrator Certified Professional Exam, Part II 1Z0-874
Exam Number/Code : 1Z0-874
Exam Name : MySQL 5.0 Database Administrator Certified Professional Exam, Part II
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Questions and Answers : 138Q&As
Update Time : 2012-12-16
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5.Which of the following best describes why InnoDB tables should always have primary keys and
why they should be short?
A. Because InnoDB uses primary keys to locate tables, and shorter keys make quicker lookups.
B. Because InnoDB uses primary keys to locate table rows, and shorter keys make quicker lookups.
C. Because InnoDB stores pointers in a log to all the primary keys and shorter keys make this log smaller.
6.Which of the following best describes how the relay log works?
A. It records the times when the slave connects to the master.
B. When a slave receives a change from the master, it is recorded in the relay log first and processed later.
C. When a slave receives a change from the master, it is processed first and then recorded in the relay log.
7.Which of the following statements are required to create a key cache of 4 MB, assign the MyISAM table world. City to it and preload the index?
A. mysql> SET GLOBAL city_cache.key_buffer_size = 4194304;mysql> CACHE INDEX world.City IN city_cache;mysql> LOAD INDEX INTO CACHE world.City;
B. mysql> ALTER TABLE world.city KEY_CACHE = 4194304;
C. mysql> CREATE CACHE FOR world.City SIZE = 4194304;
D. It is not possible to create a key cache for a specific MyISAM table, only the global key cache can be used.
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