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MCSA SQL 2016 070-764 認證培訓和詳細的解釋和答案。
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070-764 PDF DEMO:
QUESTION NO: 1
Note: This question is part of a series of questions that use the same scenario. For your convenience, the scenario is repeated in each question. Each question presents a different goal and answer choices, but the text of the scenario is exactly the same in each question in this series.
You have five servers that run Microsoft Windows 2012 R2. Each server hosts a Microsoft SQL Server instance. The topology for the environment is shown in the following diagram.
You have an Always On Availability group named AG1. The details for AG1 are shown in the following table.
Instance1 experiences heavy read-write traffic. The instance hosts a database named
OperationsMain that is four terabytes (TB) in size. The database has multiple data files and filegroups.
One of the filegroups is read_only and is half of the total database size.
Instance4 and Instance5 are not part of AG1. Instance4 is engaged in heavy read-write I/O.
Instance5 hosts a database named StagedExternal. A nightly BULK INSERT process loads data into an empty table that has a rowstore clustered index and two nonclustered rowstore indexes.
You must minimize the growth of the StagedExternal database log file during the BULK INSERT operations and perform point-in-time recovery after the BULK INSERT transaction. Changes made must not interrupt the log backup chain.
You plan to add a new instance named Instance6 to a datacenter that is geographically distant from
Site1 and Site2. You must minimize latency between the nodes in AG1.
All databases use the full recovery model. All backups are written to the network location
\\SQLBackup\. A separate process copies backups to an offsite location. You should minimize both the time required to restore the databases and the space required to store backups. The recovery point objective (RPO) for each instance is shown in the following table.
Full backups of OperationsMain take longer than six hours to complete. All SQL Server backups use the keyword COMPRESSION.
You plan to deploy the following solutions to the environment. The solutions will access a database named DB1 that is part of AG1.
* Reporting system: This solution accesses data inDB1with a login that is mapped to a database user that is a member of the db_datareader role. The user has EXECUTE permissions on the database.
Queries make no changes to the data. The queries must be load balanced over variable read-only replicas.
* Operations system: This solution accesses data inDB1with a login that is mapped to a database user that is a member of the db_datareader and db_datawriter roles. The user has EXECUTE permissions on the database. Queries from the operations system will perform both DDL and DML operations.
The wait statistics monitoring requirements for the instances are described in the following table.
You need to configure a new replica of AG1 on Instance6.
How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-
SQL statements to the correct locations. Each Transact-SQL segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
Answer:
Explanation
Scenario: You plan to add a new instance named Instance6 to a datacenter that is geographically distant from Site1 and Site2. You must minimize latency between the nodes in AG1.
Box 1: REPLICA
MODIFY REPLICA ON modifies any of the replicas ofthe availability group.
Box 2: SYNCHRONOUS_COMMIT
You must minimize latency between the nodes in AG1
AVAILABILITY_MODE = { SYNCHRONOUS_COMMIT | ASYNCHRONOUS_COMMIT }
Specifies whether the primary replica has to wait for the secondary availability group to acknowledge the hardening (writing) of the log records to disk before the primary replica can commit the transaction on a given primary database.
FAILOVER AUTOMATIC (box 4) requires SYNCHRONOUS_COMMIT
Box 3: REPLICA
MODIFY REPLICA ON modifies any of the replicas of the availability group.
Box 4: AUTOMATIC
You must minimize latency between the nodes in AG1
FAILOVER_MODE = { AUTOMATIC | MANUAL }
Specifies the failover mode of the availability replica that you are defining.
FAILOVER_MODE is required in the ADD REPLICA ON clause and optional in the MODIFY REPLICA ON clause.
AUTOMATIC enables automatic failover. AUTOMATIC is supported only if you also specify
AVAILABILITY_MODE = SYNCHRONOUS_COMMIT.
References: https://docs.microsoft.com/en-us/sql/t-sql/statements/alter-availability-group-transact- sql
QUESTION NO: 2
Note: This question is part of a series of questions that use the same scenario. For your convenience, the scenario is repeated in each question. Each question presents a different goal and answer choices, but the next of the scenario is exactly the same in each question in this series.
Start of repeated scenario
Contoso, Ltd. has Microsoft SQL Server databases that support a custom application. The current SQL
Server environment consists of two servers: ContosoSQL1 and ContosoSQL2. These two servers participate in an Always On Availability Group named ContosoAG1 that is configured to use synchronous-commit with automatic failover. The secondary replica is not configured for read-only access.
The application performs both transactional processing and historical data retrieval in a database named ContosoDB. The application includes an inventory management module. The inventory management module and database have experienced performance issues.
Users report that a query named InventoryQuery1 takes a long time to complete. The query is shown as follows:
SELECT ProductNumber, Name, ProductLine
FROM Production.Product
WHERE ProductNumber = N'<specific product>'
The query plan used by SQL Server for this query is shown in the exhibit. (Click the Exhibit tab.)
Various performance issues, including frequent long-term blocking episodes, prevent business users from completing their daily tasks. You suspect the tempdb database resources could be responsible.
You must create Blocking reports for the ContosoDB database to identify issues.
Exhibit.
You plan to use Extended Events to review all Transact-SQL statements that are run against the
ContosoSQL1 instance. The output from the Extended Events session must contain both start and stop events and must be written to a file. You must configure the Extended Events session to minimize possible data loss and reduce the effect on server performance.
You plan to deploy an additional secondary replica named ContosoSQL3 to ContosoAG1. Read-only traffic must be load-balanced between the two secondary replicas, regardless of which instance is the primary replica.
Contoso plans to add an additional dedicated reporting system that will rely on real-time data from the transactional databases.
The company plans to improve their high availability/disaster recovery (HA/DR) solution. As part of the planned improvements, you will back up all databases from ContosoSQL1 directly to an off-site location.
End of repeated scenario
You need to configure the backup process for ContosoSQL1.
What should you do?
A. Set the recovery model to Simple
B. Perform a backup to a tape device.
C. Perform mirrored backups to a DR datacenter.
D. Create a new backup set.
Answer: C
Explanation
Scenario:
The company plans to improve their high availability/disaster recovery (HA/DR) solution. As part of the planned improvements, you will back up all databases from ContosoSQL1 directly to an off-site location.
One of the features found in the Enterprise Edition of SQL Server is the ability to take mirrored backups.
Basically, taking a mirrored backup means creating additional copies of the backup media (up to three) using a single BACKUP command, eliminating the need to perform the copies with copy or robocopy.
The idea behind is that you can backup to multiple locations and increase the protection level by having additional copies of the backup set. In case one of the copies gets lost or corrupted, you can use the mirrored copy to perform a restore.
Another possible scenario for a mirrored backup is deferred tape migration: you can backup to a local disk and mirror to a shared folder on a file server. That way you could have a local copy of the backup set and restore it in case of need and let the mirrored copy migrate to tape when the disk backup software processes the file server's disks.
References:
https://www.mssqltips.com/sqlservertip/1779/mirrored-database-backup-feature-in-sql-server-
2005-and-sql-serv
QUESTION NO: 3
You need to recommend the actions that are required to partition a table.
In which order should the four actions be performed? To answer, move the actions from the list of actions to the answer area and arrange them in the correct order.
Answer:
Explanation
References:
http://technet.microsoft.com/en-us/library/ms188730.aspx
QUESTION NO: 4
You have a SQL Server 2014 environment That contains 20 servers.
The corporate security policy states that all SQL Server 2014 instances must meet specific security standards.
You need to recommend a management strategy for the SQL Server 2014 servers.
What should you include in the recommendation? More than one answer choice may achieve the goal. Select the BEST answer.
A. Maintenance plans
B. Policy-Based Management
C. Common criteria compliance
D. Multi server jobs
Answer: B
Explanation
Policy-Based Management is a system for managing one or more instances of SQL Server. When SQL
Server policy administrators use Policy-Based Management, they use SQL Server Management Studio to create policies to manage entities on the server, such as the instance of SQL Server, databases, or other SQL Server objects.
QUESTION NO: 5
You are implementing log shipping. You configure a secondary server in standby mode. You configure log shipping to occur hourly and keep up to seven days of log backups.
Users create reports by querying the secondary server. Transaction logs are not applied to the secondary server.
You need to ensure that the secondary server has current data at the beginning of each business day.
What are two possible ways to achieve the goal? Each answer represents a complete solution.
A. Configure the secondary server as a database mirroring target server.
B. Create a snapshot database from a daily backup to use as the secondary database. Revert the snapshot database back to the previous business day.
C. Disconnect users while transaction logs are applied.
D. Allow restore operations to accumulate. Run a Microsoft SQL Agent job that disconnects all users that are connected to the secondary server.
Answer: A,D
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Updated: May 28, 2022