12: Lesson Review Answers in Visual Studio .NET

Encoder PDF 417 in Visual Studio .NET 12: Lesson Review Answers

12: Lesson Review Answers
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12: Lesson Review Answers
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Lesson 1
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1. Correct Answer: D A. Incorrect: This view is used to return current low-level I/O, locking, latching, and access method activity for each partition of a table or index in the database. B. Incorrect: This view is used to return counts of different types of index operations and the time each type of operation was last performed. C. Incorrect: This view is used to determine information about missing indexes. D. Correct: This view is used to determine index fragmentation levels. 2. Correct Answer: C A. Incorrect: The avg_fragment_size_in_pages column displays information about the average number of pages in one fragment in the leaf level of an IN_ROW_DATA allocation unit, not external fragmentation levels. B. Incorrect: The avg_page_space_used_in_percent column displays information about internal fragmentation levels. C. Correct: The avg_fragmentation_in_percent column displays information about external fragmentation levels. D. Incorrect: The avg_record_size_in_bytes column displays information about the average record size in bytes, not external fragmentation levels. 3. Correct Answer: A A. Correct: You should use the ALTER INDEX REBUILD statement to correct index external fragmentation levels of greater than 15 percent. B. Incorrect: You should use the ALTER INDEX REORGANIZE statement only when external fragmentation levels are between 10 percent and 15 percent. C. Incorrect: You use the ALTER INDEX...DISABLE statement to disable indexes, not to correct index fragmentation. D. Incorrect: You use the ALTER INDEX SET STATISTICS_NORECOMPUTE = ON statement to determine whether distribution statistics are automatically recomputed.
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12: Lesson Review Answers
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Lesson 2
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1. Correct Answer: D A. Incorrect: The sys.stats_columns catalog view displays a row for each column that is part of sys.stats statistics and does not show when the statistics were last updated. B. Incorrect: DBCC SHOWCONTIG displays index fragmentation information. C. Incorrect: DBCC SHOW_STATISTICS shows statistics information, but does not show the date the statistics were last updated. D. Correct: The STATS_DATE function shows the date statistics were last updated. 2. Correct Answer: A A. Correct: The sp_autostats system stored procedure displays or changes the automatic UPDATE STATISTICS setting for a specific index and statistics or for all indexes and statistics for a specified table or indexed view in the current database. B. Incorrect: The sys.stats catalog view displays a row for each statistic of a tabular object of the type U, V, or TF. C. Incorrect: The UPDATE STATISTICS statement is used to manually update statistics. D. Incorrect: The CREATE STATISTICS statement is used to manually create statistics.
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Lesson 3
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1. Correct Answer: C A. Incorrect: The DBCC SHRINKDATABASE statement will not set a database to shrink automatically; it is a manual shrink statement. B. Incorrect: The DBCC SHRINKFILE statement will not set a database to shrink automatically; it is a manual shrink statement. C. Correct: Setting each database to shrink automatically by using the ALTER DATABASE statement will allow the database engine to periodically shrink the databases. D. Incorrect: You can use the ALTER DATABASE statement to allow the database engine to automatically shrink a database.
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12: Lesson Review Answers
Making Data Matrix ECC200 In None
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2. Correct Answer: A A. Correct: By creating a job and scheduling the job to run at night, you can execute the DBCC SHRINKFILE statement against individual database files during the night, when your end users are not using the database. B. Incorrect: The ALTER DATABASE statement, which automatically shrinks a database, cannot be scheduled. C. Incorrect: The DBCC SHRINKDATABASE statement does not let you schedule the operation unless you create a job to execute the statement. D. Incorrect: The ALTER DATABASE statement, which automatically shrinks a database, cannot be scheduled.
Lesson 4
1. Correct Answer: A A. Correct: The DBCC CHECKDB statement issues the DBCC CHECKCATALOG statement during its execution. B. Incorrect: The DBCC CHECKDB statement does not issue the DBCC CHECKIDENT statement during its execution. C. Incorrect: The DBCC CHECKDB statement does not issue the DBCC NEWALLOC statement during its execution because this statement has been discontinued in SQL Server 2005. D. Incorrect: The DBCC CHECKDB statement does not issue the DBCC TEXTALLOC statement during its execution; this statement has been discontinued in SQL Server 2005. 2. Correct Answer: C A. Incorrect: Although you can use this option against large databases, the PHYSICAL_ONLY option is recommended for frequent integrity checks against large databases because of its small overhead. B. Incorrect: Although this option can be used against large databases, the PHYSICAL_ONLY option is recommended for frequent integrity checks against large databases because of its small overhead.
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