There are the real and sample questions in the free demos to show you that how valid and latest our 70-762 Overview learning dumps are. So just try now! We have a lot of regular customers for a long-term cooperation now since they have understood how useful and effective our 70-762 Overview actual exam is. I can guarantee that you will have no regrets about using our 70-762 Overview test braindumps When the time for action arrives, stop thinking and go in, try our 70-762 Overview exam torrent, you will find our products will be a very good choice for you to pass your exam and get you certificate in a short time. If you are finding a study material to prepare your exam, our material will end your search. Our 70-762 Overview study materials are willing to stand by your side and provide attentive service, and to meet the majority of customers, we sincerely recommend our 70-762 Overview practice guide to all customers, for our rich experience and excellent service are more than you can imagine.
MCP 70-762 Actually, you must not impoverish your ambition.
Secondly, since our 70-762 - Developing SQL Databases Overview training quiz appeared on the market, seldom do we have the cases of customer information disclosure. Besides, without prolonged reparation you can pass the 70-762 Mock Test exam within a week long. Everyone's life course is irrevocable, so missing the opportunity of this time will be a pity.
The questions of our 70-762 Overview guide questions are related to the latest and basic knowledge. What’s more, our 70-762 Overview 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 Overview - They will mitigate your chance of losing.
Dear customers, you may think it is out of your league before such as winning the 70-762 Overview exam practice is possible within a week or a 70-762 Overview practice material could have passing rate over 98 percent. This time it will not be illusions for you anymore. You can learn some authentic knowledge with our high accuracy and efficiency 70-762 Overview simulating questions and help you get authentic knowledge of the exam.
Once you unfortunately fail the exam, we will give you a full refund, and our refund process is very simple. We provide 24-hour online service for all customers who have purchased 70-762 Overview test guide.
70-762 PDF DEMO:
QUESTION NO: 1
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: 2
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: 3
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: 4
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
QUESTION NO: 5
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.
With our Huawei H12-811_V1.0 study materials, all your agreeable outcomes are no longer dreams for you. Most people may wish to use the shortest time to prepare for the test and then pass the test with our Oracle 1Z0-902 study materials successfully because they have to spend their most time and energy on their jobs, learning, family lives and other important things. And it is easy to learn and understand our SAP C-TFG51-2405 exam questions. We can make sure that our RedHat EX200-KR study materials have the ability to help you solve your problem, and you will not be troubled by these questions above. Take a look at Amazon AI1-C01 preparation exam, and maybe you'll find that's exactly what you've always wanted.
Updated: May 28, 2022