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Microsoft 70-461 Exam Practice Questions (P. 4)

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Question #16
You develop a Microsoft SQL Server database.
You need to create a batch process that meets the following requirements:
✑ Returns a result set based on supplied parameters.
✑ Enables the returned result set to perform a join with a table.
Which object should you use?
  1. A
    Inline user-defined function
  2. B
    Stored procedure
  3. C
    Table-valued user-defined function
  4. D
    Scalar user-defined function

Correct Answer:
C

Question #17
You develop a Microsoft SQL Server database.
You need to create and call a stored procedure that meets the following requirements:
✑ Accepts a single input parameter for CustomerID.
✑ Returns a single integer to the calling application.
Which two Transact-SQL statements should you use? Each correct answer presents part of the solution.
  1. A
    CREATE PROCEDURE dbo.GetCustomerRating @CustomerID INT, @CustomerRating INT OUTPUT AS SET NOCOUNT ON SELECT @CustomerRating = CustomerOrders/CustomerValue FROM Customers WHERE CustomerID = @CustomerID RETURN GO
  2. B
    EXECUTE dbo.GetCustomerRating 1745
  3. C
    DECLARE @CustomerRatingByCustomer INT DECLARE @Result INT EXECUTE @Result = dbo.GetCustomerRating 1745, @CustomerRatingByCustomer
  4. D
    CREATE PROCEDURE dbo.GetCustomerRating @CustomerID INT, @CustomerRating INT OUTPUT AS SET NOCOUNT ON SELECT @Result = CustomerOrders/CustomerValue FROM Customers WHERE CustomerID = @CustomerID RETURN @Result GO
  5. E
    DECLARE @CustomerRatingByCustomer INT EXECUTE dbo.GetCustomerRating @CustomerID = 1745, @CustomerRating = @CustomerRatingByCustomer OUTPUT
  6. F
    CREATE PROCEDURE dbo.GetCustomerRating @CustomerID INT AS DECLARE @Result INT SET NOCOUNT ON SELECT @Result = CustomerOrders/CustomerValue FROM Customers WHERE CustomerID = @CustomerID

Correct Answer:
AE

Question #18
You develop a Microsoft SQL Server database that contains a heap named OrdersHistorical.
You write the following Transact-SQL query:

INSERT INTO OrdersHistorical -

SELECT * FROM CompletedOrders -
You need to optimize transaction logging and locking for the statement. Which table hint should you use?
  1. A
    HOLDLOCK
  2. B
    ROWLOCK
  3. C
    XLOCK
  4. D
    UPDLOCK
  5. E
    TABLOCK

Correct Answer:
E
Reference:
http://technet.microsoft.com/en-us/library/ms189857.aspx
http://msdn.microsoft.com/en-us/library/ms187373.aspx

Question #19
You use a Microsoft SQL Server database that contains two tables named SalesOrderHeader and SalesOrderDetail. The indexes on the tables are as shown in the exhibit. (Click the Exhibit tab.)

You write the following Transact-SQL query:

You discover that the performance of the query is slow. Analysis of the query plan shows table scans where the estimated rows do not match the actual rows for
SalesOrderHeader by using an unexpected index on SalesOrderDetail.
You need to improve the performance of the query.
What should you do?
  1. A
    Use a FORCESCAN hint in the query.
  2. B
    Add a clustered index on SalesOrderID in SalesOrderHeader.
  3. C
    Use a FORCESEEK hint in the query.
  4. D
    Update statistics on SalesOrderID on both tables.

Correct Answer:
D
References:
http://msdn.microsoft.com/en-us/library/ms187348.aspx

Question #20
Your database contains a table named Purchases. The table includes a DATETIME column named PurchaseTime that stores the date and time each purchase is made. There is a non-clustered index on the PurchaseTime column.
The business team wants a report that displays the total number of purchases made on the current day.
You need to write a query that will return the correct results in the most efficient manner.
Which Transact-SQL query should you use?
  1. A
    SELECT COUNT(*) FROM Purchases WHERE PurchaseTime = CONVERT(DATE, GETDATE())
  2. B
    SELECT COUNT(*) FROM Purchases WHERE PurchaseTime = GETDATE()
  3. C
    SELECT COUNT(*) FROM Purchases WHERE CONVERT(VARCHAR, PurchaseTime, 112) = CONVERT(VARCHAR, GETDATE(), 112)
  4. D
    SELECT COUNT(*) FROM Purchases WHERE PurchaseTime >= CONVERT(DATE, GETDATE()) AND PurchaseTime < DATEADD(DAY, 1, CONVERT(DATE, GETDATE()))

Correct Answer:
D
Two answers will return the correct results (the "WHERE CONVERT..." and "WHERE ... AND ... " answers).
The correct answer for Microsoft would be the answer that is most "efficient". Anybody have a clue as to which is most efficient? In the execution plan, the one that
I've selected as the correct answer is the query with the shortest duration. Also, the query answer with "WHERE CONVERT..." threw warnings in the execution plan...something about affecting CardinalityEstimate and SeekPlan.
Reference:
http://technet.microsoft.com/en-us/library/ms181034.aspx

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