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QUESTION 121
You are the new database administrator for a SQL Server 2014 instance. You conduct an assessment on the instance and determine that the auto create statistics setting on the database named DB1 has been turned off. You see no evidence that any maintenance has been occurring. You want to set up monitoring to see if query performance is being affected. You need to set up a monitoring process that will capture any cases where statistics could have been useful if they existed. What should you do?
A. Create a SQL Server Agent job to execute DBCC SHOWSTATISTICS on each of the primary key columns in the database.
B. Use the missing_column_statistics extended event.
C. Query the sys.statistics system view to see all cases where the statistics were last needed.
D. Write a query using the sys.dm_db_missing_index_group_stats DMV Joining to sys.indexes, filtering on is_hypothetical.
Answer: B
Explanation:
The Missing Column Statistics event class indicates that column statistics that could have been useful for the optimizer are not available. By monitoring the Missing Column Statistics event class, you can determine if there are statistics missing for a column used by a query. This can cause the optimizer to choose a less efficient query plan than expected.
QUESTION 122
You have two databases named DB1 and DB2 that are located on the same server. You plan to create a stored procedure named SProc1 in DB1. SProc1 will query a table named Table2 in DB2. You need to recommend a solution to ensure that SProc1 can access Table2 without granting users direct access to Table2. What should you include in the recommendation? More than one answer choice may achieve the goal. Select the BEST answer.
A. Contained databases
B. Application roles
C. Cross-database ownership chaining
D. Digital certificates
Answer: B
Explanation:
An application role is a database principal that enables an application to run with its own, user-like permissions. You can use application roles to enable access to specific data to only those users who connect through a particular application. Unlike database roles, application roles contain no members and are inactive by default.
QUESTION 123
You have a server named Server1 that has 16 processors. You plan to deploy multiple instances of SQL Server 2014 to Server1. You need to recommend a method to allocate processors to each instance. What should you include in the recommendation? More than one answer choice may achieve the goal. Select the BEST answer.
A. Processor affinity
B. Windows System Resource Manager (WSRM)
C. Max Degree of Parallelism
D. Resource Governor
Answer: A
Explanation:
CPU affinity management through Windows System Resource Manager is not recommended for SQL Server multi-instance management. Instead, use the processor affinity settings in SQL Server.
QUESTION 124
You have two SQL Server 2014 instances named SQLDev and SQLProd. You plan to create a new database on SQLProd that will use SQL Server Authentication. You need to ensure that when the new database is copied from SQLProd to SQLDev, users can connect to the database on SQLDev even if they do not have a login on the SQLDev instance. What should you use? More than one answer choice may achieve the goal. Select the BEST answer.
A. Triggers
B. Contained database
C. SQL Server Analysis Services (SSAS) scripts
D. Extended Events
E. SQL Server Integration Services (SSIS) scripts
Answer: B
Explanation:
A fully contained database includes all the settings and metadata required to define the database and has no configuration dependencies on the instance of the SQL Server Database Engine where the database is installed.
QUESTION 125
You have a query that is used by a reporting dashboard. Users report that the query sometimes takes a long time to run. You need to recommend a solution to identify what is causing the issue. What should you recommend? More than one answer choice may achieve the goal. Select the BEST answer.
A. Set the blocked process threshold, and then run SQL Server Profiler.
B. Set the blocked process threshold, and then create an alert.
C. Enable trace flag 1204, and then create an alert.
D. Create a job that queries the sys.dm_os_waiting_tasks dynamic management view.
Answer: B
QUESTION 126
You are troubleshooting an application that runs a query. The application frequently causes deadlocks. You need to identify the isolation level used by the query when a deadlock occurs. What should you do? More than one answer choice may achieve the goal. Select the BEST answer.
A. Query the sys.dm_exec_requests dynamic management view.
B. Create a trace in SQL Server Profiler that contains the Deadlock graph event.
C. Query the sys.dm_exec_sessions dynamic management view.
D. Enable trace flag 1222, and then view the SQL Server error log.
Answer: C
QUESTION 127
You administer a SQL Server 2014 instance. Users report that the SQL Server has seemed slow today. A large database was being restored for much of the day, which could be causing issues. You want to write a query of the system views that will report the following:
– Number of users that have a connection to the server
– Whether a user’s connection is active
– Whether any connections are blocked
– What queries are being executed
– Whether the database restore is still executing and, if it is, what percentage of the restore is complete.
Which system objects should you use in your query to best achieve this task?
A. sys.dm_exec_requests, sys.dm_exec_sessions, sys.objects
B. sys.dm_exec_sessions, sys.dm_exec_query_stats, sys.dm_exec_query_text,sys.objects
C. sys.sysprocesses, sys.dm_exec_query_text, sys.objects
D. sys.dm_exec_requests, sys.dm_exec_sessions, sys.dm_exec_query_text
Answer: D
QUESTION 128
You have a database hosted on SQL Server 2012 R2. The database contains 5 million rows. You need to recommend a repeatable method to migrate the database to SQL Azure. Which method should you recommend? More than one answer choice may achieve the goal. Select the BEST answer.
A. Create a SQL Server Integration Services (SSIS) package, and then run the package.
B. Back up the database, and then restore the database.
C. Extract a data-tier application, and then import the application.
D. Generate scripts to create all of the all database objects and all of the data, and then execute the scripts by using SQL Azure.
Answer: A
QUESTION 129
You have a SQL Server 2014 database named DB1. You plan to import a large number of records from a SQL Azure database to DB1. You need to recommend a solution to minimize the amount of space used in the transaction log during the import operation. What should you include in the recommendation?
A. The bulk-logged recovery model
B. The full recovery model
C. A new partitioned table
D. A new log file
E. A new file group
Answer: A
Explanation:
Compared to the full recovery model, which fully logs all transactions, the bulk-logged recovery model minimally logs bulk operations, although fully logging other transactions. The bulk-logged recovery model protects against media failure and, for bulk operations, provides the best performance and least log space usage.
Note:
The bulk-logged recovery model is a special-purpose recovery model that should be used only intermittently to improve the performance of certain large-scale bulk operations, such as bulk imports of large amounts of data.
QUESTION 130
You have a server named Server1 that has 2 processors. You plan to deploy multiple instances of SQL Server 2014 to Server1. Each instance will have multiple databases. You need to recommend a method to allocate processor time to each database. What should you include in the recommendation? More than one answer choice may achieve the goal. Select the BEST answer.
A. Resource Governor
B. Max Degree of Parallelism
C. Windows System Resource Manager (WSRM)
D. Processor affinity
Answer: A
Explanation:
SQL Server Resource Governor is a feature than you can use to manage SQL Server workload and system resource consumption. Resource Governor enables you to specify limits on the amount of CPU, physical IO, and memory that incoming application requests can use.
Incorrect:
Not D: PROCESS AFFINITY. Enables hardware threads to be associated with CPUs.
QUESTION 131
You have a SQL Server 2014 environment That includes four servers. The servers are configured as shown in the following table. You plan to configure Policy-Based Management to enforce the following rules:
– On Server1, enable SQL Server password policies and enable the default trace.
– On Server3, ensure that the names of user-defined stored procedures begin with the prefix “usp_” and ensure that all databases use a case-sensitive collation.
You need to recommend which server you must configure as a Central Management Server. Which server should you recommend? (Each correct answer presents a complete solution. Choose all that apply.)
A. Server1
B. Server2
C. Server3
D. Seiver4
Answer: AC
Explanation:
Need Standard or Enterprise edition of SQL Server.
QUESTION 132
You are the administrator for a SQL Server 2014 instance that stores the data for an online transaction processing sales system. The company takes full backups every week; differential backups on the days with no full backups; and hourly transaction backups. These backups are stored on a backup server in the company’s data center. Every week, the company places the full backup on a tape and sends it to a third-party backup storage system. The company is worried that a disaster might occur that could destroy their computer center and cause them to lose orders. You need to determine the best method for providing the smallest amount of data loss and downtime without leasing or purchasing additional physical locations. What should you do? More than one answer choice may achieve the goal. Select the BEST answer.
A. Set up SQL Server Always On with a SQL Azure database as a replica.
B. Set up SQL Server Always On by using a SQL Server on a Windows Azure Virtual Machine.
C. Put the differential backup on tape and send it to the third-party backup storage system.
D. Use the Microsoft SQL Server Backup to Microsoft Windows Azure Tool to direct all backups to a different geographical location.
Answer: D
Explanation:
SQL Server 2012 was the first version to provide the ability to back up databases to the Cloud, and SQL Server 2014 improves on the process. Microsoft SQL Server Backup to Windows Azure Tool enables backup to Windows Azure Blob Storage and encrypts and compresses SQL Server backups stored locally or in the cloud.
QUESTION 133
You need to recommend a backup process for data warehouse database. The solution must meet the following requirements:
– Ensure that if a hardware failure occurs, you can bring the database online without losing more than 24 hours of transactions.
– Minimize the amount of administrative effort required to restore any lost data.
– Minimize the space used by transaction logs.
What should you include in the recommendation? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Answer:
Explanation:
Box 1: Set the database to the simple recovery model.
Box 2: Perform a weekly full backup of the database.
Box 3: Perform a differential backup of the database every night.
Note:
– Simple recovery model: No log backups.
– Full recovery model: Requires log backups.
QUESTION 134
You plan to deploy a database to SQL Azure. You must create two tables named Table 1 and Table 2 that will have the following specifications:
– Table1 will contain a date column named Column1 that will contain a null value approximately 80 percent of the time.
– Table2 will contain a column named Column2 which is the product of two other columns in Table2.
Both Table1 and Table2 will contain over one million rows. You need to recommend which options must be defined for the columns. The solution must minimize the time it takes to retrieve data from the tables. Which options should you recommend? To answer, drag the appropriate options to the correct column in the answer area.
Answer:
Explanation:
– Sparse columns are ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values. Consider using sparse columns when the space saved is at least 20 percent to 40 percent.
– A Persisted column would be faster to retrieve.
– A computed column is computed from an expression that can use other columns in the same table. The expression can be a noncomputed column name, constant, function, and any combination of these connected by one or more operators. Unless otherwise specified, computed columns are virtual columns that are not physically stored in the table. Their values are recalculated every time they are referenced in a query. The Database Engine uses the PERSISTED keyword in the CREATE TABLE and ALTER TABLE statements to physically store computed columns in the table. Their values are updated when any columns that are part of their calculation change.
QUESTION 135
You use SQL Server 2014. You create a table within a database by using the following DDL:
The following table illustrates a representative sample of data:
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.
Answer:
Explanation:
Sparse columns are ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values. Consider using sparse columns when the space saved is at least 20 percent to 40 percent.
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