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 Published Date: 08/19/2019

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Question 1:

You develop a Microsoft SQL Server 2012 database that contains a heap named OrdersHistoncal.

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?

A. HOLDLOCK

B. ROWLOCK

C. XLOCK

D. UPDLOCK

E. TABLOCK

Correct Answer: E

http://technet.microsoft.com/en-us/library/ms189857.aspx http://msdn.microsoft.com/en-us/library/ms187373.aspx

Question 2:

You use Microsoft SQL Server 2012 database to develop a shopping cart application. You need to rotate the unique values of the ProductName field of a table-valued expression into multiple columns in the output. Which Transact-SQL operator should you use?

A. CROSS JOIN

B. CROSS APPLY

C. PIVOT

D. UNPIVOT

Correct Answer: C

http://technet.microsoft.com/en-us/library/ms177634.aspx

Question 3:

You administer a Microsoft SQL Server 2012 database. The database contains a table named Employee. Part of the Employee table is shown in the exhibit.

Confidential information about the employees is stored in a separate table named EmployeeData. One record exists within EmployeeData for each record in the Employee table. You need to assign the appropriate constraints and table properties to ensure data integrity and visibility. On which column in the Employee table should you use an identity specification to include a seed of 1,000 and an increment of 1?

A. DateHired

B. DepartmentID

C. EmployeeID

D. EmployeeNum

E. FirstName

F. JobTitle

G. LastName

H. MiddleName

I. ReportsToID

Correct Answer: C

Question 4:

You develop a Microsoft SQL Server 2012 database that contains a table named Customers. The Customers table has the following definition. You need to create an audit record only when either the MobileNumber or HomeNumber column is updated. Which Transact-SQL query should you use?

A. CREATE TRIGGER TrgPhoneNumberChange ON Customers FOR UPDATE AS IF COLUMNS_UPDATED (HomeNumber, MobileNumber) – – Create Audit Records

B. CREATE TRIGGER TrgPhoneNumberChange ON Customers FOR UPDATE AS IF EXISTS( SELECT HomeNumber FROM inserted) OR EXISTS (SELECT MobileNumber FROM inserted) – – Create Audit Records

C. CREATE TRIGGER TrgPhoneNumberChange ON Customers FOR UPDATE AS IF COLUMNS_CHANGED (HomeNumber, MobileNumber) – – Create Audit Records

D. CREATE TRIGGER TrgPhoneNumberChange ON Customers FOR UPDATE

AS

IF UPDATE (HomeNumber) OR UPDATE (MobileNumber)

– – Create Audit Records

Correct Answer: D

http://msdn.microsoft.com/en-us/library/bb510663.aspx http://msdn.microsoft.com/en-us/library/ms186329.aspx

Question 5:

You create a table that has the StudentCode, SubjectCode, and Marks columns to record mid-year marks for students. The table has marks obtained by 50 students for various subjects. You need to ensure that the top half of the students

arranged by their average marks must be given a rank of 1 and the remaining students must be given a rank of 2.

Which Transact-SQL query should you use?

A. SELECT StudentCode as Code, RANK ( ) OVER (ORDER BY AVG (Marks) DESC) AS Value FROM StudentMarks GROUP BY StudentCode

B. SELECT Id, Name, Marks, DENSE_RANK () OVER (ORDER BY Marks DESC) AS Rank FROM StudentMarks

C. SELECT StudentCode as Code, DENSE_RANK () OVER (ORDER BY AVG (Marks) DESC) AS Value FROM StudentMarks GROUP BY StudentCode

D. SELECT StudentCode as Code, NTILE (2) OVER (ORDER BY AVG (Marks) DESC) AS Value FROM StudentMarks GROUP BY StudentCode

E. SELECT StudentCode AS Code,Marks AS Value FROM (SELECT StudentCode, Marks AS Marks, RANK () OVER (PARTITION BY SubjectCode ORDER BY Marks ASC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

F. SELECT StudentCode AS Code,Marks AS Value FRCM ( SELECT StudentCode, Marks AS Marks, RANK() OVER (PARTITION BY SubjectCode ORDER 3Y Marks DESC) AS Rank FRCM StudentMarks) tmp WHERE Rank = 1

G. SELECT StudentCode AS Code,Marks AS Value FROM (SELECT StudentCode, Marks AS Marks, RANK () OVER (PARTITION BY StudentCode ORDER BY Marks ASC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

H. SELECT StudentCode AS Code,Marks AS Value FROM (SELECT StudentCode, Marks AS Marks, RANXO OVER (PARTITION BY StudentCode ORDER BY Marks DESC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

Correct Answer: D

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Question 6:

You create a table that has the StudentCode, SubjectCode, and Marks columns to record mid-year marks for students. The table has marks obtained by 50 students for various subjects. You need to ensure that the following requirements are met:

-Students must be ranked based on their average marks.

–

If one or more students have the same average, the same rank must be given to these students.

–

Consecutive ranks must be skipped when the same rank is assigned. Which Transact-SQL query should you use?

A.

SELECT StudentCode as Code, RANK ( ) OVER (ORDER BY AVG (Marks) DESC) AS Value FROM StudentMarks GROUP BY StudentCode

B.

SELECT Id, Name, Marks, DENSE_RANK () OVER (ORDER BY Marks DESC) AS Rank FROM StudentMarks

C.

SELECT StudentCode as Code, DENSE_RANK () OVER (ORDER BY AVG (Marks) DESC) AS Value FROM StudentMarks GROUP BY StudentCode

D.

SELECT StudentCode as Code, NTILE (2) OVER (ORDER BY AVG (Marks) DESC) AS Value FROM StudentMarks GROUP BY StudentCode

E.

SELECT StudentCode AS Code,Marks AS Value FROM (SELECT StudentCode, Marks AS Marks, RANK () OVER (PARTITION BY SubjectCode ORDER BY Marks ASC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

F.

SELECT StudentCode AS Code,Marks AS Value FRCM ( SELECT StudentCode, Marks AS Marks, RANK() OVER (PARTITION BY SubjectCode ORDER 3Y Marks DESC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

G.

SELECT StudentCode AS Code,Marks AS Value FROM (SELECT StudentCode, Marks AS Marks, RANK () OVER (PARTITION BY StudentCode ORDER BY Marks ASC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

H.

SELECT StudentCode AS Code,Marks AS Value FROM (SELECT StudentCode, Marks AS Marks, RANXO OVER (PARTITION BY StudentCode ORDER BY Marks DESC) AS Rank FROM StudentMarks) tmp WHERE Rank = 1

Correct Answer: A

http://msdn.microsoft.com/en-us/library/ms189798.aspx

Question 7:

You are developing a database application by using Microsoft SQL Server 2012. An application that uses a database begins to run slowly. You discover that a large amount of memory is consumed by single-use dynamic queries. You need to reduce procedure cache usage from these statements without creating any additional indexes. What should you do?

A. Add a HASH hint to the query.

B. Add a LOOP hint to the query.

C. Add a FORCESEEK hint to the query.

D. Add an INCLUDE clause to the index.

E. Add a FORCESCAN hint to the Attach query.

F. Add a columnstore index to cover the query.

G. Enable the optimize for ad hoc workloads option.

H. Cover the unique clustered index with a columnstore index.

I. Include a SET FORCEPLAN ON statement before you run the query.

J. Include a SET STATISTICS PROFILE ON statement before you run the query.

K. Include a SET STATISTICS SHOWPLAN_XML ON statement before you run the query.

L. Include a SET TRANSACTION ISOLATION LEVEL REPEATABLE READ statement before you run the query.

M. Include a SET TRANSACTION ISOLATION LEVEL SNAPSHOT statement before you run the query.

N. Include a SET TRANSACTION ISOLATION LEVEL SERIALIZABLE statement before you run the query.

Correct Answer: G

http://msdn.microsoft.com/en-us/library/cc645587.aspx

Question 8:

Why is it important to use standard SQL code when possible and know what is standard and what isn\’t? (Choose all that apply.)

A. It is not important to code using standard SQL.

B. Standard SQL code is more portable between platforms.

C. Standard SQL code is more efficient.

D. Knowing what standard SQL code is makes your knowledge more portable.

Correct Answer: BD

Question 9:

What are the mandatory clauses in a SELECT query, according to T-SQL?

A. The FROM and SELECT clauses

B. The SELECT and WHERE clauses

C. The SELECT clause

D. The FROM and WHERE clauses

Correct Answer: C

Question 10:

Which of the following is an example of a scalar subquery?

A. select max(price) from products

B. select sum(price) from products

C. select min(price) from products

D. All of these

Correct Answer: D

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