Ensurepass

QUESTION 48

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

 

clip_image002

 

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

 

clip_image004Fulfilled

clip_image004[1]Shipped

clip_image004[2]Ordered

clip_image004[3]Received

 

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

 

clip_image004[4]The current status of an order

clip_image004[5]The previous status of an order.

clip_image004[6]The date when the status changed.

clip_image004[7]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 49

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 50

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

 

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

 

clip_image004[8]Rebuild the indexes by using a new fill factor.

clip_image004[9]Run a custom T-SQL command.

clip_image004[10]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 51

HOTSPOT

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

 

clip_image006

 

The following table illustrates a representative sample of data:

 

clip_image008

 

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.

 

clip_image010

 

Correct Answer:

clip_image012

 

 

 

QUESTION 52

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:

 

clip_image004[11]Prevent data read by USP_1 from being modified by other active processes.

clip_image004[12]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.

 

clip_image014

 

Correct Answer:

clip_image016

 

QUESTION 53

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?

 

clip_image018

 

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 54

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)

 

 

QUESTION 55

You have a SQL Azure database named Database1. You need to design the schema for a table named table1. Table1 will have less than one million rows. Table1 will contain the following information for each row:

 

clip_image020

 

The solution must minimize the amount of space used to store each row.

 

Which data types should you recommend for each column?

 

To answer, drag the appropriate data type to the correct column in the answer area.

 

clip_image022

 

Correct Answer:

clip_image024

 

 

 

QUESTION 56

You have a SQL Server 2014 instance named SQL1. SQL1 creates error events in the Windows Application event log. You need to recommend a solution that will run an application when SQL1 logs a specific error in the Application log. Which SQL elements should you include in the recommendation? (Each correct answer presents part of the solution. Choose all that apply.)

 

A.

A policy

B.

A maintenance plan

C.

An alert

D.

A job

E.

A trigger

 

Correct Answer: DE

Explanation:

Use a trigger that starts a job which executes the application.

http://technet.microsoft.com/en-us/library/hh849759.aspx

 

 

QUESTION 57

You have a database named DB1. You plan to create a stored procedure that will insert rows into three different tables. Each insert must use the same identifying value for each table, but the value must increase from one invocation of the stored procedure to the next. Occasionally, the identifying value must be reset to its initial value. You need to design a mechanism to hold the identifying values for the stored procedure to use. What should you do?

 

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

 

A.

Create a sequence object that holds the next value in the sequence. Retrieve the next value by using the stored procedure. Reset the value by using an ALTER SEQUENCE statement as needed.

B.

Create a sequence object that holds the next value in the sequence. Retrieve the next value by using the stored procedure. Increment the sequence object to the next value by using an ALTER SEQUENCE statement. Reset the value as needed by using a different ALTER SEQUENCE statement.

C.

Create a fourth table that holds the next value in the sequence. At the end each transaction, update the value by using the stored procedure. Reset the value as needed by using an UPDATE statement.

D.

Create an identity column in each of the three tables. Use the same seed and the same increment for each table. Insert new rows into the tables by using the stored procedure. Use the DBCC CHECKIDENT command to reset the columns as needed.

 

Correct Answer: A

Explanation:

* an application can obtain the next sequence number without inserting the row by calling the NEXT VALUE FOR function.

* ALTER SEQUENCE

Includes argument:

RESTART [ WITH <constant> ]

 

The next value that will be returned by the sequence object. If provided, the RESTART WITH value must be an integer that is less than or equal to the maximum and greater than or equal to the minimum value of the sequence object. If the WITH value is omitted, the sequence numbering restarts based on the original CREATE SEQUENCE options.

 

* CREATE SEQUENCE

Creates a sequence object and specifies its properties. A sequence is a user-defined schema bound object that generates a sequence of numeric values according to the specification with which the sequence was created. The sequence of numeric values is generated in an ascending or descending order at a defined interval and can be configured to restart (cycle) when exhausted.

Sequence Numbers

 

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