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

1. Consider the available command line options of mysqlbinlog. Which of the following statements are true?

A) --start-file will read the binlog entries starting with the specified filename
B) --start-datetime will read the binlog entries starting at the specified date and time
C) --end-datetime will read the binlog entries up to the specified date and time
D) --end-position will read the binlog entries up to the specified position
E) --start-position will read the binlog entries starting at the specified position
F) --end-file will read the binlog entries ending after the specified filename

2. Which of the following correctly defines dirty reads, non-repeatable reads and phantom row?

A) A phantom is a read by one transaction of uncommitted changes made by another transaction.
B) A non-repeatable read is a row that appears where it was not visible before.
C) A dirty read is a read by one transaction of uncommitted changes made by another transaction.
D) A non-repeatable read occurs when a transaction performs the same retrieval twice but gets a differentresult each time.
E) A dirty read is a read by one transaction of its uncommitted changes.
F) A phantom is a row that appears where it was not visible before.

3. What are some advantages of using the SHOW command rather than using the
INFORMATION_SCHEMA?

A) It returns results quicker than using the INFORMATION_SCHEMA.
B) Using SHOW can provide more concise information.
C) SHOW is a feature of standard SQL, and INFORMATION_SCHEMA is a MySQL specific command.
D) It is available for releases older than MySQL 5.0.

4. Which of the following are effects of defining foreign keys in InnoDB tables without specifying either ON UPDATE or ON DELETE?

A) InnoDB will disallow any delete or update on the primary key on a parent record that may have corresponding child records.
B) InnoDB will allow both deletes and updates on the primary key on a parent record even if they have corresponding child records.
C) InnoDB will disallow any delete or update on the primary key regardless if there is a corresponding child record or not.
D) InnoDB will disallow foreign keys without specifying either ON UPDATE or ON DELETE.

5. The my.cnf file contains the following entries:
innodb_data_home_dir =
innodb_data_file_path = /ibdata/ibdata1:50M;/disk2/ibdata2:50M:autoextend
Which of the following statements are true?

A) The total maximum size of the InnoDB data files is 100MB
B) The initial size of the InnoDB data files on server startup will be set to 50MB. If more space is needed, another 50MB will be allocated.
C) There are two InnoDB data files
D) There are three InnoDB data files
E) The data files will be stored below the default data directory
F) The total minimum size of the InnoDB data files is 100MB

Solutions: