During nearly ten years, our company has kept on improving ourselves on the 70-762 Exam Practice study questions, and now we have become the leader in this field. And now our 70-762 Exam Practice training materials have become the most popular 70-762 Exam Practice practice engine in the international market. There are so many advantages of our 70-762 Exam Practice guide quiz, and as long as you have a try on them, you will definitely love our exam dumps. The passing rate and the hit rate are also very high, there are thousands of candidates choose to trust our 70-762 Exam Practice guide torrent and they have passed the exam. We provide with candidate so many guarantees that they can purchase our study materials no worries. There are the real and sample questions in the free demos to show you that how valid and latest our 70-762 Exam Practice learning dumps are.
MCP 70-762 It is your right time to make your mark.
Secondly, since our 70-762 - Developing SQL Databases Exam Practice training quiz appeared on the market, seldom do we have the cases of customer information disclosure. But our 70-762 Interactive Practice Exam real exam is high efficient which can pass the 70-762 Interactive Practice Exam exam during a week. To prevent you from promiscuous state, we arranged our 70-762 Interactive Practice Exam learning materials with clear parts of knowledge.
The questions of our 70-762 Exam Practice guide questions are related to the latest and basic knowledge. What’s more, our 70-762 Exam Practice learning materials are committed to grasp the most knowledgeable points with the fewest problems. So 20-30 hours of study is enough for you to deal with the exam.
Microsoft 70-762 Exam Practice - So our product is a good choice for you.
As to the rapid changes happened in this 70-762 Exam Practice exam, experts will fix them and we assure your 70-762 Exam Practice exam simulation you are looking at now are the newest version. Materials trends are not always easy to forecast on our study guide, but they have predictable pattern for them by ten-year experience who often accurately predict points of knowledge occurring in next 70-762 Exam Practice preparation materials.
And they are trained specially and professionlly to know every detail about our 70-762 Exam Practice learning prep. If you have never bought our 70-762 Exam Practice exam materials on the website before, we understand you may encounter many problems such as payment or downloading 70-762 Exam Practice practice quiz and so on, contact with us, we will be there.
70-762 PDF DEMO:
QUESTION NO: 1
You are reviewing the execution plans in the query plan cache. You observe the following:
- There are a large number of single use plans.
- There are a large number of simple execution plans that use multiple CPU cores.
You need to configure the server to optimize query plan execution.
Which two setting should you modify on the properties page for the Microsoft SQL Server instance?
To answer, select the appropriate settings in the answer area.
Answer:
Explanation
* Optimize for ad hoc workloads
The optimize for ad hoc workloads option is used to improve the efficiency of the plan cache for workloads that contain many single use ad hoc batches. When this option is set to 1, the Database
Engine stores a small compiled plan stub in the plan cache when a batch is compiled for the first time, instead of the full compiled plan. This helps to relieve memory pressure by not allowing the plan cache to become filled with compiled plans that are not reused.
* Cost Threshold for Parallelism
Use the cost threshold for parallelism option to specify the threshold at which Microsoft SQL Server creates and runs parallel plans for queries. SQL Server creates and runs a parallel plan for a query only when the estimated cost to run a serial plan for the same query is higher than the value set in cost threshold for parallelism. The cost refers to an estimated elapsed time in seconds required to run the serial plan on a specific hardware configuration.
5 means 5 seconds, but is is 5 seconds on a machine internal to Microsoft from some time in the
1990s.
There's no way to relate it to execution time on your current machine, so we treat it as a pure number now.
Raising it to 50 is a common suggestion nowadays, so that more of your simpler queries run on a single thread.
QUESTION NO: 2
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution. Determine whether the solution meets the stated goals.
You have a table that has a clustered index and a nonclustered index. The indexes use different columns from the table. You have a query named Users report that Query1 takes a long time to report results. You run and review the following statistics for an index seek operation:
You need to resolve the performance issue.
Solution: You rebuild the clustered index.
Does the solution meet the goal?
A. No
B. Yes
Answer: A
Explanation
The query uses the nonclustered index, so improving the clustered index will not help.
We should update statistics for the nonclustered index.
QUESTION NO: 3
Note: This question is part of a series of questions that present the same scenario. Each question in this series contains a unique solution. Determine whether the solution meets the stated goals.
The Account table was created by using the following Transact-SQL statement:
There are more than 1 billion records in the Account table. The Account Number column uniquely identifies each account. The ProductCode column has 100 different values. The values are evenly distributed in the table. Table statistics are refreshed and up to date.
You frequently run the following Transact-SQL SELECT statements:
You must avoid table scans when you run the queries.
You need to create one or more indexes for the table.
Solution: You run the following Transact-SQL statement:
CREATE CLUSTERED INDEX PK_Account ON Account(ProductCode);
Does the solution meet the goal?
A. No
B. Yes
Answer: A
Explanation
We need an index on the productCode column as well.
References: https://msdn.microsoft.com/en-us/library/ms190457.aspx
QUESTION NO: 4
You have a reporting application that uses a table named Table1. You deploy a new batch update process to perform updates to Table1.
The environment is configured with the following properties:
* The database is configured with the default isolation setting.
* The application and process use the default transaction handling.
You observe the application cannot access any rows that are in use by the process.
You have the following requirements:
* Ensure the application is not blocked by the process.
* Ensure the application has a consistent view of the data
* Ensure the application does not read dirty data.
You need to resolve the issue and meet the requirements with the least amount of administrative effort.
What should you do?
A. Enable the database for the READ_COMITTED_SNAPSHOT isolation level.
B. Enable the database for the ALLOW_SNAPSHOT_ISOLATION isolation level. Modify the application and the update process for the SNAPSHOT isolation level.
C. Enable the database for the ALLOW_SNAPSHOT_ISOLATION isolation level. Modify the application for the SERIALIZABLE isolation level.
D. Enable the application for the WITH (NOLOCK) hint.
Answer: A
Explanation
Snapshot isolation must be enabled by setting the ALLOW_SNAPSHOT_ISOLATION ON database option before it is used in transactions. This activates the mechanism for storing row versions in the temporary database (tempdb).
READ COMMITTED is the default isolation level for SQL Server. It prevents dirty reads by specifying that statements cannot read data values that have been modified but not yet committed by other transactions. Other transactions can still modify, insert, or delete data between executions of individual statements within the current transaction, resulting in non-repeatable reads, or "phantom" data.
QUESTION NO: 5
Database users report that SELECT statements take a long time to return results. You run the following Transact-SQL statement:
You need to create one nonclustered covering index that contains all of the columns in the above table. You must minimize index key size.
Which Transact-SQL statement should you run?
A. CREATE NONCLUSTERED INDEX IX_User ON Users (UserStatus, CountryCode) INCLUDE
(UserName);
B. CREATE NONCLUSTERED INDEX IX_User ON Users (CountryCode, UserStatus, UserName);
C. CREATE NONCLUSTERED INDEX IX_User ON Users (CountryCode, UserStatus) INCLUDE
(UserName);
D. CREATE NONCLUSTERED INDEX IX_User ON Users (CountryCode, UserName);
Answer: C
Explanation
https://docs.microsoft.com/en-us/sql/relational-databases/indexes/create-indexes-with-included- columns
We have been always trying to make every effort to consolidate and keep a close relationship with customer by improving the quality of our Citrix 1Y0-204 practice materials. Compared with the other products in the market, our PECB ISO-IEC-27001-Lead-Implementer latest questions grasp of the core knowledge and key point of the real exam, the targeted and efficient Developing SQL Databases study training dumps guarantee our candidates to pass the test easily. Let us take a try of our amazing ISQI CTFL_Syll_4.0 exam questions and know the advantages first! You will find that you can receive our EMC D-PSC-DS-23 training guide in just a few minutes, almost 5 to 10 minutes. SAP C-THR70-2404 - And we have become a popular brand in this field.
Updated: May 28, 2022