[Free] 2018(July) Ensurepass Microsoft 70-762 Dumps with VCE and PDF 1-10

Ensurepass.com : Ensure you pass the IT Exams
2018 July Microsoft Official New Released 70-762
100% Free Download! 100% Pass Guaranteed!

Developing SQL Databases

Question No: 1 DRAG DROP

You are analyzing the performance of a database environment.

Applications that access the database are experiencing locks that are held for a large amount of time. You are experiencing isolation phenomena such as dirty, nonrepeatable and phantom reads.

You need to identify the impact of specific transaction isolation levels on the concurrency and consistency of data.

What are the consistency and concurrency implications of each transaction isolation level? To answer, drag the appropriate isolation levels to the correct locations. Each isolation level 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.

Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Explanation:

Ensurepass 2018 PDF and VCE

Read Uncommitted (aka dirty read): A transaction T1executing under this isolation level can access data changed by concurrent transaction(s).

Pros:No read locks needed to read data (i.e. no reader/writer blocking). Note, T1 still takes transaction duration locks for any data modified.

Cons: Data is notguaranteed to be transactionally consistent.

Read Committed: A transaction T1 executing under thisisolation level can only access committed data.

Pros: Good compromise between concurrency and consistency.

Cons: Locking and blocking. The data can change when accessed multiple times within the same transaction.

Repeatable Read: A transaction T1 executing under this isolation level can only access committed data with an additional guarantee that any data read cannot change (i.e. it is repeatable) for the duration of the transaction.

Pros: Higher data consistency.

Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency. It does not protect against phantom rows.

Serializable: A transaction T1 executing under this isolation level provides the highest data consistency including elimination of phantoms but at the cost of reduced concurrency. It prevents phantoms by taking a range lock or table level lock if range lock can’t be acquired (i.e. no index on the predicate column) for the duration of the transaction.

Pros: Full data consistency including phantom protection.

Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency.

References:https://blogs.msdn.microsoft.com/sqlcat/2011/02/20/concurrency-series-basics- of-transaction-isolation-levels/

Question No: 2

You are developing an application that connects to a database. The application runs the following jobs:

Ensurepass 2018 PDF and VCE

The READ_COMMITTED_SNAPSHOT database option is set to OFF, and auto-content is set to ON. Within the stored procedures, no explicit transactions are defined.

If JobB starts before JobA, it can finish in seconds. If JobA starts first, JobB takes a long time to complete.

You need to use Microsoft SQL Server Profiler to determine whether the blocking that you observe in JobB is caused by locks acquired by JobA.

Which trace event class in the Locks event category should you use?

  1. LockAcquired

  2. LockCancel

  3. LockDeadlock

  4. LockEscalation

Answer: A Explanation:

The Lock:Acquiredevent class indicates that acquisition of a lock on a resource, such asa data page, has been achieved.

The Lock:Acquired and Lock:Released event classes can be used to monitor when objects are being locked, the typeof locks taken, and for how long the locks were retained. Locks retained for long periods of time may cause contention issues and should be investigated.

Question No: 3

Note: This question is part of a series of questions that use the same or similar answer choices. An Answer choice may be correct for more than one question in the series. Each question independent of the other questions in this series. Information and details provided in a question apply only to that question.

You are a database developer for a company. The company has a server that has multiple physical disks. The disks are not part of a RAID array. The server hosts three Microsoft SQL Server instances. There are many SQL jobs that run during off-peak hours.

You observe that many deadlocks appear to be happening during specific times of the day.

You need to monitor the SQL environment and capture the information about the processes that are causing the deadlocks.

What should you do?

  1. A. Create a sys.dm_os_waiting_tasks query.

  2. Create a sys.dm_exec_sessions query.

  3. Create a PerformanceMonitor Data Collector Set.

  4. Create a sys.dm_os_memory_objects query.

  5. Create a sp_configure ‘max server memory’ query.

  6. Create a SQL Profiler trace.

  7. Create a sys.dm_os_wait_stats query.

  8. Create an Extended Event.

Answer: F Explanation:

Toview deadlock information, the Database Engine provides monitoring tools in the form of two trace flags, and the deadlock graph event in SQL Server Profiler.

Trace Flag 1204 and Trace Flag 1222

When deadlocks occur, trace flag 1204 and trace flag 1222 return information that is captured in the SQL Server error log. Trace flag 1204 reports deadlock information formatted by each nodeinvolved in the deadlock. Trace flag 1222 formats deadlock information, first by processesand then by resources. It is possible to enable both trace flags to obtain two representations of the same deadlock event.

References:https://technet.microsoft.com/en-us/library/ms178104(v=sql.105).aspx

Question No: 4

You have a database that is experiencing deadlock issues when users run queries. You need to ensure that all deadlocks are recorded in XML format.

What should you do?

  1. Create a Microsoft SQL Server Integration Services package that uses sys.dm_tran_locks.

  2. Enable trace flag 1224 by using the Database Cpmsistency Checker(BDCC).

  3. Enable trace flag 1222 in thestartup options for Microsoft SQL Server.

  4. Use the Microsoft SQL Server Profiler Lock:Deadlock event class.

Answer: C Explanation:

When deadlocks occur, trace flag 1204 and trace flag 1222 return information that is capturedin the SQL Server error log.Trace flag 1204 reports deadlock information formatted by each node involved in the deadlock. Trace flag 1222 formats deadlock information, first by processes and then by resources.

The output format for Trace Flag 1222 only returns information in an XML-like format. References:https://technet.microsoft.com/en-us/library/ms178104(v=sql.105).aspx

Question No: 5 DRAG DROP

You have a trigger named CheckTriggerCreation that runs when a user attempts to create a trigger. The CheckTriggerCreation trigger was created with the ENCRYPTION option and additional proprietary business logic.

You need to prevent users from running the ALTER and DROP statements or the sp_tableoption stored procedure.

Which three Transact-SQL segments should you use to develop the solution? To answer, move the appropriate Transact-SQL segments from the list of Transact-SQL segments to the answer area and arrange them in the correct order.

Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Question No: 6 HOTSPOT

You are developing an app that allows users to query historical company financial data. You are reviewing email messages from the various stakeholders for a project.

The message from the security officer is shown in the Security Officer Email exhibit below. TO: Database developer

From: Security Officer

Subject: SQL object requirements

We need to simplify the security settings for the SQL objects. Having a assign permissions at every object in SQL is tedious and leads to a problem. Documentation is also more difficult when we have to assign permissions at multiple levels. We need to assign the required permissions at one object, even though that object may be obtaining from other objects.

The message from the sales manager is shown in the Sales Manager Email exhibit below. TO: Database developer

From: Sales Manager Subject: Needed SQL objects

When creating objects for our use, they need to be flexible. We will be changing the base infrastructure frequently. We need components in SQL that will provide backward compatibility to our front end applications as the environments change so that do not need to modify the front end applications. We need objects that can provide a filtered set of the data. The data may be coming from multiple tables and we need an object that can provide access to all of the data through a single object reference.

This is an example of the types of data we need to be able to have queries against without having to change the front end applications.

Ensurepass 2018 PDF and VCE

The message from the web developer is shown in the Web Developer Email exhibit below.

TO: Database developer From: Web Developer

Subject: SQL Object component

Whatever you will be configuring to provide access to data in SQL, it needs to connect using the items referenced in this interface. We have been using this for a long time, and we cannot change this from end easily. Whatever objects are going to be used in SQL they must work using object types this interface references.

Ensurepass 2018 PDF and VCE

You need to create one or more objects that meet the needs of the security officer, the sales manager and the web developer.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Explanation:

Ensurepass 2018 PDF and VCE

  • Stored procedure: Yes

    A stored procecure to implement the following:

    Whatever you will be configuring to provide access to data in SQL, it needs to connect using the items referenced inthis interface. We have been using this for a long time, and we cannot changethis from end easily. Whatever objects are going to be used in SQL they must work using object types this interface references.

  • Trigger: No

    No requirements are related to actions taken when changing the data.

  • View: Yes

Because: We need objects that can provide a filtered set of the data. The data may be coming from multiple tables and we need an object that can provide access to all of the data through a single object reference.

Question No: 7 DRAG DROP

You are analyzing the performance of a database environment.

You suspect there are several missing indexes in the current database.

You need to return a prioritized list of the missing indexes on the current database.

How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-SQL segments 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.

Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Explanation:

Ensurepass 2018 PDF and VCE

Box 1: sys.db_db_missing_index_group_stats

The sys.db_db_missing_index_group_stats table include the required columns for the main query: avg_total_user_cost, avg_user_impact, user_seeks, and user scans.

Box 2: group_handle

Example: The following query determines which missing indexes comprise a particular missing index group, and displays their column details. For the sake of this example, the missing index group handle is 24.

SELECT migs.group_handle, mid.*

FROM sys.dm_db_missing_index_group_stats AS migs INNER JOIN sys.dm_db_missing_index_groups AS mig ON (migs.group_handle = mig.index_group_handle) INNER JOIN sys.dm_db_missing_index_details AS mid ON (mig.index_handle = mid.index_handle)

WHERE migs.group_handle = 24;

Box 3: sys.db_db_missing_index_group_stats

The sys.db_db_missing_index_group_stats table include the required columns for the subquery: avg_total_user_cost and avg_user_impact.

Example: Find the 10 missing indexes with the highest anticipated improvement for user queries

The following query determines which 10 missing indexes would produce the highest anticipated cumulative improvement, in descending order, for user queries.

SELECT TOP 10 *

FROM sys.dm_db_missing_index_group_stats

ORDER BY avg_total_user_cost * avg_user_impact * (user_seeks user_scans)DESC;

Question No: 8 DRAG DROP

You are evaluating the performance of a database environment.

You must avoid unnecessary locks and ensure that lost updates do not occur. You need to choose the transaction isolation level for each data scenario.

Which isolation level should you use for each scenario? To answer, drag the appropriate isolation levels to the correct scenarios. Each isolation 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.

Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Explanation:

Ensurepass 2018 PDF and VCE

Box 1: Readcommitted

Read Committed: A transaction T1 executing under this isolation level can only access committed data.

Pros: Good compromise between concurrency and consistency.

Cons: Locking and blocking. The data can change when accessed multiple times within the same transaction.

Box 2: Read Uncommitted

Read Uncommitted (aka dirty read): A transaction T1 executing under this isolation level can access data changed by concurrent transaction(s).

Pros: No read locks needed to readdata (i.e. no reader/writer blocking). Note, T1 still takes transaction duration locks for any data modified.

Cons: Data is not guaranteed to be transactionally consistent.

Box 3: Serializable

Serializable: A transaction T1 executing under this isolation level provides the highest data consistency including elimination of phantoms but at the cost of reduced concurrency. It prevents phantoms by taking a range lock or table level lock if range lock can’t be acquired (i.e. no index on the predicate column) for the duration of the transaction.

Pros: Full data consistency including phantom protection.

Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency.

References:https://blogs.msdn.microsoft.com/sqlcat/2011/02/20/concurrency-series-basics- of-transaction-isolation-levels/

Question No: 9 DRAG DROP

You are monitoring a Microsoft Azure SQL Database. The database is experiencing high CPU consumption.

You need to determine which query uses the most cumulative CPU.

How should you complete the Transact-SQL statement? To answer, drag the appropriate Transact-SQL segments to the correct locations. Each Transact-SQL segment may be used once, more than one or not at all. You may need to drag the split bar between panes or scroll to view content.

Ensurepass 2018 PDF and VCE

Answer:

Ensurepass 2018 PDF and VCE

Explanation:

Ensurepass 2018 PDF and VCE

Box 1: sys.dm_exec_query_stats

sys.dm_exec_query_stats returns aggregateperformance statistics for cached query plans in SQL Server.

Box 2: highest_cpu_queries.total_worker_time DESC Sort ontotal_worker_time column

Example: The following example returns information about the top five queries ranked by average CPU time.

Thisexample aggregates the queries according to their query hash so that logically equivalentqueries are grouped by their cumulative resource consumption.

USE AdventureWorks2012; GO

SELECT TOP 5 query_stats.query_hash AS quot;Query Hashquot;, SUM(query_stats.total_worker_time) / SUM(query_stats.execution_count) AS quot;Avg CPU Timequot;,

MIN(query_stats.statement_text) AS quot;Statement Textquot; FROM

(SELECT QS.*,

SUBSTRING(ST.text, (QS.statement_start_offset/2) 1,

((CASE statement_end_offset

WHEN -1 THEN DATALENGTH(ST.text)

ELSE QS.statement_end_offset END

  • QS.statement_start_offset)/2) 1) AS statement_text FROM sys.dm_exec_query_stats AS QS

    CROSS APPLY sys.dm_exec_sql_text(QS.sql_handle)as ST) as query_stats GROUP BY query_stats.query_hash

    ORDER BY 2 DESC;

    References: https://msdn.microsoft.com/en-us/library/ms189741.aspx

    Question No: 10

    Note: The question is part of a series of questions that use the same or similar answer choices. An answer choice may be correct for more than one question in the series. Each question is independent of the other question in the series. Information and details provided in a question apply only to that question.

    You have a reporting database that includes a non-partitioned fact table named Fact_Sales. The table is persisted on disk.

    Users report that their queries take a long time to complete. The system administrator reports that the table takes too much space in the database. You observe that there are no indexes defined on the table, and many columns have repeating values.

    You need to create the most efficient index on the table, minimize disk storage and improve reporting query performance.

    What should you do?

    1. Create a clustered indexon the table.

    2. Create a nonclustered index on the table.

    3. Create a nonclustered filtered index on the table.

    4. Create a clustered columnstore index on the table.

    5. Create a nonclustered columnstore index on the table.

    6. Create a hash index on thetable.

      Answer: D Explanation:

      The columnstore index is the standard for storing and querying largedata warehousing fact tables. It uses column-based data storage and query processing to achieve up to 10x query performance gains in your data warehouse overtraditional row-oriented storage, and up to 10x data compression over the uncompressed data size.

      A clustered columnstore index is the physical storage for the entire table.

      100% Ensurepass Free Download!
      Download Free Demo:70-762 Demo PDF
      100% Ensurepass Free Guaranteed!
      70-762 Dumps

      EnsurePass ExamCollection Testking
      Lowest Price Guarantee Yes No No
      Up-to-Dated Yes No No
      Real Questions Yes No No
      Explanation Yes No No
      PDF VCE Yes No No
      Free VCE Simulator Yes No No
      Instant Download Yes No No


Leave a Reply

Your email address will not be published. Required fields are marked *

  • Categories

  • Tags

  • Hot Exams

  • Hot Exams

  • Hot Catageories

  • microsoft dumps

    62-193 Dumps
    70-243 Dumps
    70-246 Dumps
    70-247 Dumps
    70-331 Dumps
    70-332 Dumps
    70-333 Dumps
    70-334 Dumps
    70-339 Dumps
    70-341 Dumps
    70-342 Dumps
    70-345 Dumps
    70-346 Dumps
    70-347 Dumps
    70-348 Dumps
    70-354 Dumps
    70-355 Dumps
    70-357 Dumps
    70-383 Dumps
    70-384 Dumps
    70-385 Dumps
    70-398 Dumps
    70-410 Dumps
    70-411 Dumps
    70-412 Dumps
    70-413 Dumps
    70-414 Dumps
    70-417 Dumps
    70-461 Dumps
    70-462 Dumps
    70-463 Dumps
    70-464 Dumps
    70-465 Dumps
    70-466 Dumps
    70-467 Dumps
    70-469 Dumps
    70-470 Dumps
    70-473 Dumps
    70-475 Dumps
    70-480 Dumps
    70-481 Dumps
    70-482 Dumps
    70-483 Dumps
    70-484 Dumps
    70-485 Dumps
    70-486 Dumps
    70-487 Dumps
    70-488 Dumps
    70-489 Dumps
    70-490 Dumps
    70-491 Dumps
    70-492 Dumps
    70-494 Dumps
    70-496 Dumps
    70-497 Dumps
    70-498 Dumps
    70-499 Dumps
    70-517 Dumps
    70-532 Dumps
    70-533 Dumps
    70-534 Dumps
    70-535 Dumps
    70-537 Dumps
    70-640 Dumps
    70-642 Dumps
    70-646 Dumps
    70-673 Dumps
    70-680 Dumps
    70-681 Dumps
    70-682 Dumps
    70-684 Dumps
    70-685 Dumps
    70-686 Dumps
    70-687 Dumps
    70-688 Dumps
    70-689 Dumps
    70-692 Dumps
    70-694 Dumps
    70-695 Dumps
    70-696 Dumps
    70-697 Dumps
    70-698 Dumps
    70-703 Dumps
    70-705 Dumps
    70-713 Dumps
    70-734 Dumps
    70-735 Dumps
    70-740 Dumps
    70-741 Dumps
    70-742 Dumps
    70-743 Dumps
    70-744 Dumps
    70-745 Dumps
    70-761 Dumps
    70-762 Dumps
    70-764 Dumps
    70-765 Dumps
    70-767 Dumps
    70-768 Dumps
    70-773 Dumps
    70-774 Dumps
    70-775 Dumps
    70-776 Dumps
    70-778 Dumps
    70-779 Dumps
    70-980 Dumps
    70-981 Dumps
    70-982 Dumps
    74-343 Dumps
    74-344 Dumps
    74-409 Dumps
    74-678 Dumps
    74-697 Dumps
    77-418 Dumps
    77-419 Dumps
    77-420 Dumps
    77-421 Dumps
    77-422 Dumps
    77-423 Dumps
    77-424 Dumps
    77-425 Dumps
    77-426 Dumps
    77-427 Dumps
    77-428 Dumps
    77-600 Dumps
    77-601 Dumps
    77-602 Dumps
    77-603 Dumps
    77-604 Dumps
    77-605 Dumps
    77-725 Dumps
    77-726 Dumps
    77-727 Dumps
    77-728 Dumps
    77-729 Dumps
    77-730 Dumps
    77-731 Dumps
    77-853 Dumps
    77-881 Dumps
    77-882 Dumps
    77-883 Dumps
    77-884 Dumps
    77-885 Dumps
    77-886 Dumps
    77-887 Dumps
    77-888 Dumps
    77-891 Dumps
    98-349 Dumps
    98-361 Dumps
    98-362 Dumps
    98-363 Dumps
    98-364 Dumps
    98-365 Dumps
    98-366 Dumps
    98-367 Dumps
    98-368 Dumps
    98-369 Dumps
    98-372 Dumps
    98-373 Dumps
    98-374 Dumps
    98-375 Dumps
    98-379 Dumps
    98-380 Dumps
    98-381 Dumps
    98-382 Dumps
    98-383 Dumps
    98-388 Dumps
    AZ-100 Dumps
    AZ-101 Dumps
    AZ-102 Dumps
    INF-203x Dumps
    INF-204x Dumps
    INF-205x Dumps
    INF-206x Dumps
    MB2-700 Dumps
    MB2-701 Dumps
    MB2-702 Dumps
    MB2-703 Dumps
    MB2-704 Dumps
    MB2-706 Dumps
    MB2-707 Dumps
    MB2-708 Dumps
    MB2-709 Dumps
    MB2-710 Dumps
    MB2-711 Dumps
    MB2-712 Dumps
    MB2-713 Dumps
    MB2-714 Dumps
    MB2-715 Dumps
    MB2-716 Dumps
    MB2-717 Dumps
    MB2-718 Dumps
    MB2-719 Dumps
    MB2-877 Dumps
    MB5-705 Dumps
    MB6-700 Dumps
    MB6-701 Dumps
    MB6-702 Dumps
    MB6-703 Dumps
    MB6-704 Dumps
    MB6-705 Dumps
    MB6-884 Dumps
    MB6-885 Dumps
    MB6-886 Dumps
    MB6-889 Dumps
    MB6-890 Dumps
    MB6-892 Dumps
    MB6-893 Dumps
    MB6-894 Dumps
    MB6-895 Dumps
    MB6-896 Dumps
    MB6-897 Dumps
    MB6-898 Dumps