70-464 Exam
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Exam Code: 70-464 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Developing Microsoft SQL Server 2012 Databases
Certification Provider: Microsoft
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Q91. You plan to migrate an instance of SQL Server 2008 to a new installation of SQL Server 2012.
You need to migrate alerts and e-mail notifications.
Which system stored procedures should you use? (Each correct answer presents part of the solution. Choose all that apply.)
A. sp_syspolicy_create_job
B. sp_add_operator
C. sp_audit_write
D. sp_add_alert
Answer: B,C
Explanation: B: sp_add_operator
Creates an operator (notification recipient) for use with alerts and jobs.
C: sp_audit_write Adds a user-defined audit event to the USER_DEFINED_AUDIT_GROUP. If USER_DEFINED_AUDIT_GROUP is not enabled, sp_audit_write is ignored.
Q92. You use SQL Server 2012 to store data used by an e-commerce application.
You develop a stored procedure named sp1. Sp1 is used to read the price of all the products sold on the e-commerce site.
You need to ensure that sp1 can read data even while another transaction is modifying the price of a product. Sp1 must only read committed data.
Which transaction isolation level should you use in sp1?
A. Serializable
B. Snapshot
C. Repeatable read
D. Read committed
Answer: B
Q93. You plan to create a stored procedure that inserts data from an XML file to the OrderDetails table. The following is the signature of the stored procedure:
The following is the XSD file used to create the ValidateOrder schema collection:
You develop a code segment that retrieves the number of items and loops through each item. Each time the loop runs, a variable named @itemNumber is incremented.
You need to develop a code segment that retrieves the product ID of each item number in the loop.
Which code segment should you develop?
A. SET @productID = @items.value'/Root/Product/productID', int)
B. SET @productID = @items.value'/Root/Product['+ @itemNumber+ ']/@productID', int)
C. SET @productID = @items.value'/Root/Product['+ @itemNumber+ ']/productID', int)
D. SET @productID = @items.value'/Root/Product/@productID', int)
Answer: B
Topic 7, Fourth Coffee
Background
Corporate Information
Fourth Coffee is global restaurant chain. There are more than 5,000 locations worldwide.
Physical Locations
Currently a server at each location hosts a SQL Server 2012 instance. Each instance contains a database called StoreTransactions that stores all transactions from point of sale and uploads summary batches nightly.
Each server belongs to the COFFECORP domain. Local computer accounts access the StoreTransactions database at each store using sysadmin and datareaderwriter roles.
Planned changes
Fourth Coffee has three major initiatives:
The IT department must consolidate the point of sales database infrastructure.
The marketing department plans to launch a mobile application for micropayments.
The finance department wants to deploy an internal tool that will help detect fraud.
Initially, the mobile application will allow customers to make micropayments to buy coffee and other items on the company web site. These micropayments may be sent as gifts to other users and redeemed within an hour of ownership transfer. Later versions will generate profiles based on customer activity that will push texts and ads generated by an analytics application.
When the consolidation is finished and the mobile application is in production, the micropayments and point of sale transactions will use the same database.
...
Existing Environment
Existing Application Environment
Some stores have been using several pilot versions of the micropayment application. Each version currently is in a database that is independent from the point of sales systems. Some versions have been used in field tests at local stores, and others are hosted at corporate servers. All pilot versions were developed by using SQL Server 2012.
Existing Support Infrastructure
The proposed database for consolidating micropayments and transactions is called CoffeeTransactions. The database is hosted on a SQL Server 2014 Enterprise Edition instance and has the following file structures:
Business Requirements
General Application Solution Requirements
The database infrastructure must support a phased global rollout of the micropayment application and consolidation.
The consolidated micropayment and point of sales database will be into a CoffeeTransactions database. The infrastructure also will include a new CoffeeAnalytics database for reporting on content from CoffeeTransactions.
Mobile applications will interact most frequently with the micropayment database for the
following activities: . Retrieving the current status of a micropayment; . Modifying the status of the current micropayment; and . Canceling the micropayment.
The mobile application will need to meet the following requirements: . Communicate with web services that assign a new user to a micropayment by using a stored procedure named usp_AssignUser. . Update the location of the user by using a stored procedure named usp_AddMobileLocation.
The fraud detection service will need to meet the following requirements: . Query the current open micropayments for users who own multiple micropayments by using a stored procedure named usp.LookupConcurrentUsers. . Persist the current user locations by using a stored procedure named usp_MobileLocationSnapshot. . Look at the status of micropayments and mark micropayments for internal investigations. . Move micropayments to dbo.POSException table by using a stored procedure named ups_DetectSuspiciousActivity. . Detect micropayments that are flagged with a StatusId value that is greater than 3 and that occurred within the last minute.
The CoffeeAnalytics database will combine imports of the POSTransaction and MobileLocation tables to create a UserActivity table for reports on the trends in activity. Queries against the UserActivity table will include aggregated calculations on all columns that are not used in filters or groupings.
Micropayments need to be updated and queried for only a week after their creation by the mobile application or fraud detection services.
Performance
The most critical performance requirement is keeping the response time for any queries of
the POSTransaction table predictable and fast.
Web service queries will take a higher priority in performance tuning decisions over the
fraud detection agent queries.
Scalability
Queries of the user of a micropayment cannot return while the micropayment is being updated, but can show different users during different stages of the transaction.
The fraud detection service frequently will run queries over the micropayments that occur over different time periods that range between 30 seconds and ten minutes.
The POSTransaction table must have its structure optimized for hundreds of thousands of active micropayments that are updated frequently.
All changes to the POSTransaction table will require testing in order to confirm the expected throughput that will support the first year's performance requirements.
Updates of a user's location can tolerate some data loss.
Initial testing has determined that the POSTransaction and POSException tables will be migrated to an in-memory optimized table.
Availability
In order to minimize disruption at local stores during consolidation, nightly processes will restore the databases to a staging server at corporate headquarters.
Technical Requirements
Security
The sensitive nature of financial transactions in the store databases requires certification of the COFFECORP\Auditors group at corporate that will perform audits of the data. Members of the COFFECORP\Auditors group cannot have sysadmin or datawriter access to the database. Compliance requires that the data stewards have access to any restored StoreTransactions database without changing any security settings at a database level.
Nightly batch processes are run by the services account in the COFFECORP\StoreAgent group and need to be able to restore and verify the schema of the store databases match.
No Windows group should have more access to store databases than is necessary.
Maintainability
You need to anticipate when POSTransaction table will need index maintenance.
When the daily maintenance finishes, micropayments that are one week old must be available for queries in UserActivity table but will be queried most frequently within their first week and will require support for in-memory queries for data within first week.
The maintenance of the UserActivity table must allow frequent maintenance on the day's most recent activities with minimal impact on the use of disk space and the resources available to queries. The processes that add data to the UserActivity table must be able to update data from any time period, even while maintenance is running.
The index maintenance strategy for the UserActivity table must provide the optimal structure for both maintainability and query performance.
All micropayments queries must include the most permissive isolation level available for the maximum throughput.
In the event of unexpected results, all stored procedures must provide error messages in text message to the calling web service.
Any modifications to stored procedures will require the minimal amount of schema changes necessary to increase the performance.
Performance
Stress testing of the mobile application on the proposed CoffeeTransactions database uncovered performance bottlenecks. The sys.dm_os_wait_stats Dynamic Management View (DMV) shows high wait_time values for WRTTELOG and PAGEIOLATCHJJP wait types when updating the MobileLocation table.
Updates to the MobileLocation table must have minimal impact on physical resources.
Supporting Infrastructure
The stored procedure usp_LookupConcurrentUsers has the current implementation:
The current stored procedure for persisting a user location is defined in the following code:
The current stored procedure for managing micropayments needing investigation is defined in the following code:
The current table, before implementing any performance enhancements, is defined as follows:
Q94. You plan to modify a stored procedure to use temporary data. The stored procedure must meet the following requirements:
. Favor physical memory when physical memory is available.
. Be able to roll back changes to the temporary data.
You need to recommend which object to add to the stored procedure.
Which T-SQL command should you recommend?
A. CREATE TABLE ##Table...
B. CREATE TABLE Table...
C. CREATE VIEW Table...
D. CREATE PARTITION SCHEME Table...
E. DECLARE TABLE @ Table...
Answer: A
Explanation: Temporary Tables You can create local and global temporary tables. Local temporary tables are visible only in the current session, and global temporary tables are visible to all sessions. Temporary tables cannot be partitioned. Prefix local temporary table names with single number sign (#table_name), and prefix global temporary table names with a double number sign (##table_name)
Q95. You need to create a function that will use a SELECT statement in ProductsByProductType.sql.
Which code segment should you use to complete the function?
A. Option A
B. Option B
C. Option C
D. Option D
Answer: B
Explanation:
http://msdn.microsoft.com/en-us/library/ms191320.aspx http://msdn.microsoft.com/en-us/library/ms186755.aspx
Q96. You have a table named Rooms that contains three columns. You execute the following query:
You discover the execution plan shown in the exhibit. (Click the Exhibit button.)
You need to recommend a solution to reduce the amount of time it takes to execute the query.
What should you do?
More than one answer choice may achieve the goal. Select the BEST answer.
A. Include the RoomName column and the Position column in the Room_IX index.
B. Create a nonclustered index for RoomName, Id, and Position.
C. Create a clustered index for Id.
D. Use the WITH (INDEX(Room_IX),NOLOCK) query hint.
Answer: B
Q97. While testing the CategoryFromType function, you discover that the function is returning 'Other'.
You need to update CategoryFromType to return the category name.
Which line of code should you modify in CategoryFromType.sql?
A. 04
B. 05
C. 12
D. 14
Answer: B
Q98. You have a Microsoft SQL Azure database named DBAzurel. DBAzurel contains a table named Orders that stores sales data.
Each order has a sales total that can only be discovered by querying multiple tables.
You need to ensure that the value of the sales total is returned by executing a query on Orders.
What should you create?
A. A calculated column that uses a scalar function
B. A trigger that uses a table-valued function
C. A calculated column that uses a table-valued function
D. A trigger that uses a ranking function
Answer: C
Explanation: A table-valued parameter is scoped to the stored procedure, function, or
dynamic Transact-SQL text, exactly like other parameters. Similarly, a variable of table type
has scope like any other local variable that is created by using a DECLARE statement. You
can declare table-valued variables within dynamic Transact-SQL statements and pass
these variables as table-valued parameters to stored procedures and functions.
Table-valued parameters offer more flexibility and in some cases better performance than
temporary tables or other ways to pass a list of parameters.
Incorrect:
Not A: A scalar function would only be able to use other columns from the same table.
Q99. You need to modify the function in CountryFromID.sql to ensure that the country name is returned instead of the country ID.
Which line of code should you modify in CountryFromID.sql?
A. 04
B. 05
C. 06
D. 19
Answer: D
Explanation:
http://msdn.microsoft.com/en-us/library/ms186755.aspx http://msdn.microsoft.com/en-us/library/ms191320.aspx
Q100. You have a Microsoft SQL Azure database. You have the following stored procedure:
You discover that the stored procedure periodically fails to update Person.Contact.
You need to ensure that Person.Contact is always updated when UpdateContact executes. The solution must minimize the amount of time required for the stored procedure to execute and the number of locks held.
What should you do?
A. Add the following line of code to line 12:
WITH (UPDLOCK)
B. Add the following line of code to line 05:
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
C. Add the following line of code to line 08:
WITH (UPDLOCK)
D. Add the following line of code to line 05:
SET TRANSACTION ISOLATION LEVEL SNAPSHOT
Answer: C
Explanation: * Overall, you should use UPDLOCK when you read a value that you plan to update later in the same transaction to prevent the value from changing.
* UPDLOCK Specifies that update locks are to be taken and held until the transaction completes. UPDLOCK takes update locks for read operations only at the row-level or page-level. If UPDLOCK is combined with TABLOCK, or a table-level lock is taken for some other reason, an exclusive (X) lock will be taken instead. When UPDLOCK is specified, the READCOMMITTED and READCOMMITTEDLOCK isolation level hints are ignored. For example, if the isolation level of the session is set to SERIALIZABLE and a query specifies (UPDLOCK, READCOMMITTED), the READCOMMITTED hint is ignored and the transaction is run using the SERIALIZABLE isolation level.