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QUESTION NO: 1
You are completing the installation of the Data Quality Server component of SQL Server Data
Quality Services (DQS).
You need to complete the post-installation configuration.
What should you do?
A. Run the Data Quality Server Installer.
B. Make the data available for DQS operations.
C. Install ADOMD.NET.
D. Run the Configuration component in the Data Quality Client.
Answer: A
Explanation:
After you complete the SQL Server installation wizard, you must perform additional steps mentioned in this section to complete your Data Quality Server installation, configure it, and then use it.
To complete the Data Quality Server installation, run the DQSInstaller.exe file.
References: https://docs.microsoft.com/en-us/sql/data-quality-services/install-windows/install-data- quality-services?view=sql-server-2017#PostInstallationTasks

QUESTION NO: 2
You have a default installation of SQL Server that hosts an Online Transaction Processing
(OLTP) application.
Users report that they experience poor overall query performance for the application.
You query the wait statistics and discover that the two top waits are CXPACKET and
SOS_SCHEDULER_YIELD.
You need to modify the SQL Server settings to resolve the issue causing the poor query performance.
Which two settings should you modify? Each correct answer presents part of the solution.
A. cost threshold for parallelism
B. Minimum Memory
C. optimize for ad hoc workloads
D. Boost SQL Server priority
E. max degree of parallelism (MAXDOP)
Answer: A,E
Explanation:
A: Lower the MAXDOP.
When high CXPACKET values are encountered, a possible issue, even in case when parallelism is evenly distributed, is when the cost of creating the parallel plan is higher than the cost of the serialized thread.
This is often something that is overlooked and by the rule of thumb of reaching for altering of the
Max Degree of Parallelism (MAXDOP), by setting it to 1 (each and every query will be processed by the single CPU core). Configuring MAXDOP settings to 1 should be the last resource used in troubleshooting excessive CXPACKET wait times.
When a high CXPACKET value is accompanied with a LATCH_XX and with PAGEIOLATCH_XX or
SOS_SCHEDULER_YIELD, it is an indicator that slow/inefficient parallelism itself is the actual root cause of the performance issues. And in such a scenario if the LATCH_XX waits is
ACCESS_METHODS_DATASET_PARENT or ACCESS_METHODS_SCAN_RANGE_GENERATOR class, then it is highly possible that the parallelism level is the bottleneck and the actual root cause of the query performance issue. This is a typical example when MAXDOP should be reduced.
E: The Cost Threshold for Parallelism (CTFP) value is in seconds and it means that for every query for which SQL Server estimates that running time will be longer than 5 seconds, a parallel plan will be created.
To prevent unwanted parallelism, the CTFP number could be increased and by the aforementioned rule of thumb, a minimum value of 25. Recent analysis indicates that 50 should be the optimal minimal number for modern computers.
References: https://www.sqlshack.com/troubleshooting-the-cxpacket-wait-type-in-sql-server/

QUESTION NO: 3
DRAG DROP
You administer a Microsoft SQL Server instance that contains a database of confidential data.
You need to enable Transparent Data Encryption.
Which four actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Answer:
The steps to setup TDE are:
Step 1: Create a master key
We must first create the master key. It must be created in the master database.
Example:
USE master;
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = '<UseStrongPasswordHere>';
go
Step 2: Create or obtain a certificate protected by the master key
Once the master key is created, we will go ahead and create the actual certificate in the master database, not the user database.
Example:
CREATE CERTIFICATE MyServerCert WITH SUBJECT = 'My DEK Certificate';
go
USE AdventureWorks2012;
GO
Step 3: Create a database encryption key and protect it by the certificate Now, we must utilize our
USE command to switch to the database, the user database, that we wish to encrypt. Then we create a connection or association between the certificate that we just created and the actual database.
Example:
USE <DB>
GO
CREATE DATABASE ENCRYPTION KEY
WITH ALGORITHM = AES_256
ENCRYPTION BY SERVER CERTIFICATE TDE_Cert;
GO
Step 4: Set the database to use encryption
Example:
ALTER DATABASE AdventureWorks2012
SET ENCRYPTION ON;
GO
References: https://docs.microsoft.com/en-us/sql/relational-
databases/security/encryption/transparent-data-encryption

QUESTION NO: 4
You work as the Senior Database Administrator (DBA) at ABC.com. The company has a main office and 10 branch offices. Each branch office contains a single database server running Microsoft
SQL Server 2012. The main office has multiple clustered servers running Microsoft SQL Server 2012.
Your role includes the management of the entire Microsoft SQL Server 2012 infrastructure.
The company runs a custom application that stores data in a large Microsoft SQL Server 2012 database.
The primary database is hosted in the main office. Each branch office SQL Server hosts a copy of the database.
You need to configure a solution that will replicate the entire primary database from the main office
SQL Server every weekend.
What should you include in your solution?
A. SQL Server Availability Group
B. Log Shipping
C. Snapshot Replication
D. Transactional Replication
Answer: C

QUESTION NO: 5
You administer several Microsoft SQL Server 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. Set the Remote Connection Timeout on the Publisher to 0.
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. Change the Merge agent on the problem subscribers to run continuously.
Answer: C
Explanation:
When replication is configured, a set of agent profiles is installed on the Distributor. An agent profile contains a set of parameters that are used each time an agent runs: each agent logs in to the
Distributor during its startup process and queries for the parameters in its profile.
For merge subscriptions that use Web synchronization, profiles are downloaded and stored at the
Subscriber. If the profile is changed, the profile at the Subscriber is updated the next time the Merge
Agent runs. For more information about Web synchronization, see Web Synchronization for Merge
Replication.
Replication provides a default profile for each agent and additional predefined profiles for the Log
Reader Agent, Distribution Agent, and Merge Agent. In addition to the profiles provided, you can create profiles suited to your application requirements. An agent profile allows you to change key parameters easily for all agents associated with that profile. For example, if you have 20 Snapshot
Agents and need to change the query timeout value (the - QueryTimeout parameter), you can update the profile used by the Snapshot Agents and all agents of that type will begin using the new value automatically the next time they run.
You might also have different profiles for different instances of an agent. For example, a Merge Agent that connects to the Publisher and Distributor over a dialup connection could use a set of parameters that are better suited to the slower communications link by using the slow link profile.

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