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  1. Home
  2. Microsoft Certification
  3. DP-300 Exam
  4. Microsoft.DP-300.v2022-08-03.q185 Dumps
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Question 146

You have SQL Server on an Azure virtual machine that contains a database named DB1.
You have an application that queries DB1 to generate a sales report.
You need to see the parameter values from the last time the query was executed.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

Correct Answer: A,C
Last_Query_Plan_Stats allows you to enable or disable collection of the last query plan statistics (equivalent to an actual execution plan) in sys.dm_exec_query_plan_stats.
Lightweight profiling can be disabled at the database level using the LIGHTWEIGHT_QUERY_PROFILING database scoped configuration: ALTER DATABASE SCOPED CONFIGURATION SET LIGHTWEIGHT_QUERY_PROFILING = OFF;.
Incorrect Answers:
E: Parameter sensitivity, also known as "parameter sniffing", refers to a process whereby SQL Server "sniffs" the current parameter values during compilation or recompilation, and passes it along to the Query Optimizer so that they can be used to generate potentially more efficient query execution plans.
Parameter values are sniffed during compilation or recompilation for the following types of batches:
* Stored procedures
* Queries submitted via sp_executesql
* Prepared queries
Reference:
https://docs.microsoft.com/en-us/sql/relational-databases/performance/query-profiling-infrastructure
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Question 147

You are evaluating the role assignments.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

Correct Answer:

Reference:
https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles
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Question 148

Note: This question is part of a series of questions that present the same scenario. Each question in
the series contains a unique solution that might meet the stated goals. Some question sets might have
more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these
questions will not appear in the review screen.
You have two Azure SQL Database servers named Server1 and Server2. Each server contains an Azure SQL
database named Database1.
You need to restore Database1 from Server1 to Server2. The solution must replace the existing Database1 on
Server2.
Solution: From the Azure portal, you delete Database1 from Server2, and then you create a new database on
Server2 by using the backup of Database1 from Server1.
Does this meet the goal?

Correct Answer: B
Section: [none]
Explanation:
Instead restore Database1 from Server1 to the Server2 by using the RESTORE Transact-SQL command and
the REPLACE option.
Note: REPLACE should be used rarely and only after careful consideration. Restore normally prevents
accidentally overwriting a database with a different database. If the database specified in a RESTORE
statement already exists on the current server and the specified database family GUID differs from the
database family GUID recorded in the backup set, the database is not restored. This is an important safeguard.
Reference:
https://docs.microsoft.com/en-us/sql/t-sql/statements/restore-statements-transact-sql
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Question 149

You have an Azure subscription that contains the resources shown in the following table.

You need to create a read-only replica of DB1 and configure the App1 instances to use the replica.
What should you do? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

Correct Answer:

Reference:
https://sqlserverguides.com/read-only-replica-azure-sql/
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Question 150

You have an Azure Synapse Analytics dedicated SQL pool.
You run PDW_SHOWSPACEUSED('dbo.FactInternetSales'); and get the results shown in the following table.

Which statement accurately describes the dbo.FactInternetSales table?

Correct Answer: D
The rows per distribution can vary up to 10% without a noticeable impact on performance. Here the distribution varies more than 10%. It is skewed.
Note: SHOWSPACEUSED displays the number of rows, disk space reserved, and disk space used for a specific table, or for all tables in a Azure Synapse Analytics or Parallel Data Warehouse database.
This is a very quick and simple way to see the number of table rows that are stored in each of the 60 distributions of your database. Remember that for the most balanced performance, the rows in your distributed table should be spread evenly across all the distributions.
ROUND_ROBIN distributed tables should not be skewed. Data is distributed evenly across the nodes by design.
Reference:
https://docs.microsoft.com/en-us/azure/synapse-analytics/sql-data-warehouse/sql-data-warehouse-tables-distribute
https://github.com/rgl/azure-content/blob/master/articles/sql-data-warehouse/sql-data-warehouse-manage-distributed-data-skew.md
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