70-765 Exam Dumps

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QUESTION 178
Settings Value
VM size D3
Storage Location Drive E
Storage type Standard
Tempdb location Drive C
The workload on this instance has of the tembdb load.
You need to maximize the performance of the tempdb database.
Solution: You use a GS-Series VM and store the tempdb database on attached Premium storage.
Does this meet the goal?

A. Yes
B. No

Answer: B
Explanation:
For VMs that support Premium Storage (DS-series, DSv2-series, and GS-series), we recommend storing TempDB on a disk that supports Premium Storage with read caching enabled. There is one exception to this recommendation; if your TempDB usage is write-intensive, you can achieve higher performance by storing TempDB on the local D drive, which is also SSD-based on these machine sizes.
References:
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/sql/virtual-machines-windows-sql-performance

QUESTION 179
You have Microsoft SQL Server on a Microsoft azure virtual machine that has 12 databases.
All database files are in the same Azure Blob storage account.
You need to receive an email notification if I/O operations to the database files exceed 800 MB/s for more than five minutes.
Solution: You run the Get-Counter cmdlet and specify the 璫ounter `\physicaldisk:disk Transfers/sec’ parameter.
Does this meet the goal?

A. Yes
B. No

Answer: A

QUESTION 180
You have Microsoft SQL Server on a Microsoft azure virtual machine that has 12 databases.
All database files are in the same Azure Blob storage account.
You need to receive an email notification if I/O operations to the database files exceed 800 MB/s for more than five minutes.
Solution: You run the Get-Counter cmdlet and specify the 璫ounter `\physicaldisk:disk write/sec’ parameter.
Does this meet the goal?

A. Yes
B. No

Answer: B

QUESTION 181
You have Microsoft SQL Server on a Microsoft azure virtual machine that has 12 databases.
All database files are in the same Azure Blob storage account.
You need to receive an email notification if I/O operations to the database files exceed 800 MB/s for more than five minutes.
Solution: You run the Add-AzureRmMetricAlertRule cmdlet and specify the 璏etricName `Network Out’ parameter.
Does this meet the goal?

A. Yes
B. No

Answer: B

QUESTION 182
You use a Microsoft Azure SQL database as a data warehouse. The database is in the Standard service tier and has 400 elastic database throughput units (eDTUs). You load data to the database by using Azure Data Factory.
You need to reduce the amount of time it takes to load the data.
Solution: You move the database to a Premium database pool that has 125 eDTUs.
Does the solution meet the goal?

A. Yes
B. No

Answer: B
Explanation:
We need at least 400 eDTUs.

QUESTION 183
You use a Microsoft Azure SQL database as a data warehouse. The database is in the Standard service tier and has 400 elastic database throughput units (eDTUs).
You load data to the database by using Azure Data Factory.
You need to reduce the amount of time it takes to load the data.
Solution: You move the database to a Basic database pool that has 1,600 eDTUs.
Does the solution meet the goal?

A. Yes
B. No

Answer: B
Explanation:
We need the use of a Standard database pool.

QUESTION 184
You use a Microsoft Azure SQL database as a data warehouse. The database is in the Standard service tier and has 400 elastic database throughput units (eDTUs).
You load data to the database by using Azure Data Factory.
You need to reduce the amount of time it takes to load the data.
Solution: You move the database to a Standard database pool that has 800 eDTUs.
Does the solution meet the goal?

A. Yes
B. No

Answer: A
Explanation:
We need at least 400 eDTUs and the use of a Standard database pool.
References:
https://docs.microsoft.com/en-us/azure/sql-database/sql-database-dtu-resource-limits

QUESTION 185
You are tuning the performance of a virtual machines that hosts a Microsoft SQL Server instance.
The virtual machine originally had four CPU cores and now has 32 CPU cores.
The SQL Server instance uses the default settings and has an OLTP database named db1. The largest table in db1 is a key value store table named table1.
Several reports use the PIVOT statement and access more than 100 million rows in table1. You discover that when the reports run, there are PAGELATCH_IO waits on PFS pages 2:1:1, 2:2:1, 2:3:1, and 2:4:1 within the tempdb database.
You need to prevent the PAGELATCH_IO waits from occurring.
Solution: You rewrite the queries to use aggregates instead of PIVOT statements.
Does this meet the goal?

A. Yes
B. No

Answer: B
Explanation:
Instead you can add more files to the database.
References:
https://www.mssqltips.com/sqlservertip/3088/explanation-of-sql-server-io-and-latches/

QUESTION 186
You are migrating an on-premises Microsoft SQL Server instance to SQL Server on a Microsoft Azure virtual machine. The instance has 30 databased that consume a total of 2 TB of disk space. The instance sustains more than 30,000 transactions per second.
You need to provision storage for the virtual machine. The storage must be able to support the same load as the on-premises deployment.
Solution: You use drive D on the virtual machine to store the database files.
Does this meet the goal?

A. Yes
B. No

Answer: B
Explanation:
The D drive should only be used for temporary data.

QUESTION 187
You have a database named DB1 that contains a table named Table1. Tabe1 has a non-clustered index named index1.
You discover that index1 is corrupt.
You need to repair index1.
Which statement should you execute?

A. DBCC CHECKDB (`db1′, REPAIR_FAST)
B. ALTER INDEX indx1 ON table1 REBUILD WITH (ONLINE-ON)
C. ALTER INDEX index1 ON table1 REORGANIZE
D. DBCC CHECKDB (`db1′, DATA_PURITY)

Answer: B
Explanation:
If REBUILD is performed online (ON) the data in this table is available for queries and data modification during the index operation.
Incorrect Answers:
A: REPAIR_FAST maintains syntax for backward compatibility only. No repair actions are performed.
D: DATA_PURITY causes DBCC CHECKDB to check the database for column values that are not valid or out-of-range.
References:
https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-index-transact-sql?view=sql-server-2017 https://docs.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-checkdb-transact-sql?view=sql-server-2017

QUESTION 188
Hotspot Question
Database DB1 must use two CPU cores.
Queries that were running on database DB2 prior to migration do not complete.
You need to configure the databases.
In the table below, identify the parameter that must be configured for each databases.
Select one option for DB1, and one option for DB2. Select one option for each column.

Answer:

Explanation:
DB1: MAXDOP
You can use the max degree of parallelism (MAXDOP) option to limit the number of processors to use in parallel plan execution.
DB2: LEGACY_CARDINALITY_ESTIMATION
The CE (Cardinality Estimation) predicts how many rows your query will likely return. The cardinality prediction is used by the Query Optimizer to generate the optimal query plan. With more accurate estimations, the Query Optimizer can usually do a better job of producing a more optimal query plan. Legacy CE: For a SQL Server database set at compatibility level 120 and above, the CE version 70 can be can be activated by using the at the database level by using the ALTER DATABASE SCOPED CONFIGURATION.
Example:
ALTER DATABASE SCOPED CONFIGURATION
SET LEGACY_CARDINALITY_ESTIMATION = ON;
GO
Reference:
https://social.technet.microsoft.com/wiki/contents/articles/34718.new-sql-server-2016-scoped-configuration.aspx


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