Ensurepass

QUESTION 44

You are designing a Windows Azure SQL Database for an order fulfillment system. You create a table named Sales.Orders with the following script.

 

 

Each order is tracked by using one of the following statuses:

 

Fulfilled

Shipped

Ordered

Received

 

You need to design the database to ensure that that you can retrieve the following information:

 

The current status of an order

The previous status of an order.

The date when the status changed.

The solution must minimize storage.

 

More than one answer choice may achieve the goal. Select the BEST answer.

 

A.	To the Sales.Orders table, add three columns named Status, PreviousStatus and ChangeDate. Update rows as the order status changes.
B.	Create a new table named Sales.OrderStatus that contains three columns named OrderID, StatusDate, and Status. Insert new rows into the table as the order status changes.
C.	Implement change data capture on the Sales.Orders table.
D.	To the Sales.Orders table, add three columns named FulfilledDate, ShippedDate, and ReceivedDate. Update the value of each column from null to the appropriate date as the order status changes.

 

Correct Answer: B

 

 

QUESTION 45

You create a stored procedure that retrieves all of the rows from a table named Table1. You need to recommend a solution to ensure that all of the statements in the stored procedure can be executed if another transaction is modifying rows in Table1 simultaneously. What should you recommend?

 

A.	Snapshot isolation
B.	A database snapshot
C.	Filegroups
D.	Indexes

 

Correct Answer: A

Explanation:

Once snapshot isolation is enabled, updated row versions for each transaction are maintained in tempdb. A unique transaction sequence number identifies each transaction, and these unique numbers are recorded for each row version. The transaction works with the most recent row versions having a sequence number before the sequence number of the transaction. Newer row versions created after the transaction has begun are ignored by the transaction.

Transaction Isolation Levels

 

 

QUESTION 46

You have a SQL Server instance on a server named Server1.

 

You need to recommend a solution to perform the following tasks every week:

 

Rebuild the indexes by using a new fill factor.

Run a custom T-SQL command.

Back up the databases.

 

What should you recommend?

 

More than one answer choice may achieve the goal. Select the BEST answer.

 

A.	A trigger
B.	An alert
C.	A maintenance plan
D.	Windows PowerShell
E.	A system policy

 

Correct Answer: C

Explanation:

Maintenance plans create a workflow of the tasks required to make sure that your database is optimized, regularly backed up, and free of inconsistencies.

Maintenance Plans

 

 

QUESTION 47

HOTSPOT

You use SQL Server 2014. You create a table within a database by using the following DDL:

 

 

The following table illustrates a representative sample of data:

 

 

The system is expected to handle 50 million orders a month over the next five years.

 

You have been instructed by your Team Lead to follow best practices for storage and performance in the utilization of SPARSE columns.

 

Which columns should you designate as SPARSE? To answer, mark each column as SPARSE or NOT SPARSE in the answer area.

 

 

Correct Answer:

 

 

QUESTION 48

DRAG DROP

You plan to deploy a database to SQL Azure.

 

You are designing two stored procedures named USP_1 and USP_2 that have the following requirements:

 

Prevent data read by USP_1 from being modified by other active processes.

Allow USP_2 to perform dirty reads.

 

You need to recommend the isolation level for the stored procedures.

 

The solution must maximize concurrency.

 

Which isolation levels should you recommend?

 

To answer, drag the appropriate isolation level to the correct stored procedure in the answer area.

 

 

Correct Answer:

 

 

QUESTION 49

You use SQL Server 2014 to maintain the data used by applications at your company. You want to execute two statements. You need to guarantee that either both statements succeed, or both statements fail together as a batch. Which code should you use?

 

 

A.	Option A
B.	Option B
C.	Option C
D.	Option D
E.	Option E

 

Correct Answer: D

Explanation:

Structure should be:

BEGIN TRY

BEGIN TRANSACTION

 

COMMIT TRANSACTION

END TRY

BEGIN CATCH

ROLLBACK TRANSACTION

END CATCH.

TRY…CATCH (Transact-SQL)

 

 

QUESTION 50

You deploy a SQL Server instance named SQLProd that uses SQL Server 2014. You need to recommend a solution to monitor the transactions that are running currently against SQLProd. The solution must minimize the amount of custom code required. What should you recommend?

 

A.	Statistics
B.	A dynamic management view
C.	A trigger
D.	User-defined views

 

Correct Answer: B

Explanation:

Dynamic management views and functions return server state information that can be used to monitor the health of a server instance, diagnose problems, and tune performance.

Transactions can be monitored.

Dynamic Management Views and Functions (Transact-SQL)

 

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