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最新的 MCSA 70-457 免費考試真題:

1. You administer a Microsoft SQL Server 2012 server that has a database named Contoso. The Contoso database has a table named ProductPrices in a schema named Sales. You need to create a script that writes audit events into the application log whenever data in the ProductPrices table is updated. Which four Transact-SQL statements should you use? (To answer, move the appropriate statements from the list of statements to the answer area and arrange them in the correct order.)
Build List and Reorder:

2. You are developing a database application by using Microsoft SQL Server 2012. An application that uses a database begins to run slowly. You discover that during reads, the transaction experiences blocking from concurrent updates. You need to ensure that throughout the transaction the data maintains the original version. What should you do?

A) Include a SET FORCEPLAN ON statement before you run the query.
B) Include a SET STATISTICS SHOWPLAN_XML ON statement before you run the query.
C) Add a LOOP hint to the query.
D) Include a SET TRANSACTION ISOLATION LEVEL REPEATABLE READ statement before you run the query.
E) Include a SET TRANSACTION ISOLATION LEVEL SNAPSHOT statement before you run the query.
F) Add a HASH hint to the query.
G) Cover the unique clustered index with a columnstore index.
H) Add a columnstore index to cover the query.
I) Include a SET TRANSACTION ISOLATION LEVEL SERIALIZABLE statement before you run the query.
J) Add a FORCESEEK hint to the query.
K) Include a SET STATISTICS PROFILE ON statement before you run the query.
L) Add a FORCESCAN hint to the Attach query.
M) Enable the optimize for ad hoc workloads option.
N) Add an INCLUDE clause to the index.

3. A table named Profits stores the total profit made each year within a territory. The Profits table has columns named Territory, Year, and Profit. You need to create a report that displays the profits made by each territory for each year and its preceding year. Which Transact-SQL query should you use?

A) SELECT Territory, Year, Profit,
LAG(Profit, 1, 0) OVER (PARTITION BY Year ORDER BY Territory) AS
NextProfit
FROM Profits
B) SELECT Territory, Year, Profit,
LEAD(Profit, 1, 0) OVER (PARTITION BY Year ORDER BY Territory) AS
NextProfit
FROM Profits
C) SELECT Territory, Year, Profit,
LEAD(Profit, 1, 0) OVER (PARTITION BY Territory ORDER BY Year) AS
NextProfit
FROM Profits
D) SELECT Territory, Year, Profit, LAG(Profit, 1, 0) OVER (PARTITION BY Territory ORDER BY Year) AS
NextProfit
FROM Profits

4. You administer several Microsoft SQL Server 2012 database servers. Merge replication has been configured for an application that is distributed across offices throughout a wide area network (WAN). Many of the tables involved in replication use the XML and varchar(max) data types. Occasionally, merge replication fails due to timeout errors. You need to reduce the occurrence of these timeout errors. What should you do?

A) Change the Merge agent on the problem subscribers to run continuously.
B) Create a snapshot publication, and reconfigure the problem subscribers to use the snapshot publication.
C) Set the Merge agent on the problem subscribers to use the slow link agent profile.
D) Set the Remote Connection Timeout on the Publisher to 0.

5. You use a contained database named ContosoDb within a domain. You need to create a user who can log on to the ContosoDb database. You also need to ensure that you can port the database to different database servers within the domain without additional user account configurations. Which type of user should you create?

A) SQL user without login
B) User mapped to an asymmetric key
C) Domain user
D) login mapped to a virtual account

問題與答案：