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NEW QUESTION: 1
An administrator has unsuccessfully attempted several times to install an Operating System inside a virtual
machine. The administrator finds that the installation fails at random intervals.
Which two actions can be taken to resolve this issue? (Choose two.)
A. Attempt the installation an additional time.
B. Attempt to use a different installation media or installation method.
C. Create a new virtual machine and attempt the installation with the existing media.
D. Verify the md5sum and if invalid, download the installation files again.
Answer: B,D
NEW QUESTION: 2
A business analyst wishes to show that a company wants to store information about different types of product. Some attributes are common to every product (for example; product name) but other attributes only apply to certain product types. For example, product material only applies to accessory products. Which of the following constructs could the business analyst use to represent this on a class model?
A. An association class.
B. A many-to-many multiplicity.
C. An <<extend>> structure.
D. A generalisation structure.
Answer: D
NEW QUESTION: 3
You administer a Microsoft SQL Server 2014 database named Orders.
Orders contains a table named OrderShip that is defined as follows:
A NULL value represents a domestic order. Ninety percent of the values in CountryCode are NULL.
Customers require a procedure that will return orders for all customers from a specified country.
You create a new procedure:
Performance on this procedure is slow.
You need to alter the schema to optimize this query. Objects created must use a minimum amount of resources.
Which Transact-SQL statement should you use?
A. CREATE NONCLUSTERED INDEX IX_CountryCode ON Ordership (CountryCode) WHERE CountryCode IS NOT NULL
B. CREATE CLUSTERED INDEX IX_CountryCode ON OrderShip (CountryCode)
C. CREATE INDEX IX_CountryCode ON OrderShip (CustomerID) WHERE CountryCode IS NOT NULL
D. CREATE STATISTICS ST_CountryCode ON OrderShip (CountryCode) WHERE CountryCodeIS NOT NULL
Answer: D
Explanation:
Here creating statistics is relevant. The CREATE STATISTICS command creates query optimization statistics on one or more columns of a table, an indexed view, or an external table. For most queries, the query optimizer already generates the necessary statistics for a high-quality query plan; in a few cases, you need to create additional statistics with CREATE STATISTICS or modify the query design to improve query performance.
References: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-statistics-transact-sql