Microsoft
Exam Name: Microsoft Developing Microsoft SQL Server 2012 Databases
Exam code: 70-464
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Question:
1
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Your company has a SQL Azure subscription. You
implement a database named Database1. Database1 has two tables named Table1 and
Table2. You create a stored procedure named sp1.Sp1 reads data from Table1 and
inserts data into Table2. A user named User1 informs you that he is unable to
run sp1. You verify that User1 has the SELECT permission on Table1 and Table2.
You need to ensure that User1 can run sp1. The solution must minimize the
number of permissions assigned to User1. What should you do?
A. Grant User1 the INSERT permission on Table2.
B. Add User1 to the db_datawriter role.
C. Change sp1 to run as the sa user.
D. Grant User1 the EXECUTE permission on sp1.
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Answer: D
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Question:
2
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You use SQL Server 2012 to maintain the data used by
the applications at your company. You plan to create a table named Table1 by
using the following statement. (Line numbers are included for reference only.)
You need to ensure that Table1 contains a column named
UserName. The UserName column will:
• Store string values in any language.
• Accept a maximum of 200 characters.
• Be case-insensitive and accent-insensitive
Which code segment should you add at line 03?
A. UserName varchar(200) COLLATE Latin1_General_CI_AI
NOT NULL.
B. UserName nvarchar (200) COLLATE
Latin1_General_CI_AI NOT NULL.
C. UserName nvarchar(200) COLLATE Lati1l_General_CS_AS
NOT NULL.
D. UserName varchar(200) COLLATE Latin1 General CS AS
NOT NULL.
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Answer: B
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Question:
3
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DRAG DROP
You have a table named Table1 that contains 1 million
rows. Table1 contains a column named Column1 that stores sensitive information.
Column1 uses the nvarchar (16) data type. You have a certificate named Cert1.
You need to replace Column1 with a new encrypted column named Column2 that uses
one-way hashing. Which code segment should you execute before you remove
Column1? To answer, move the appropriate code segments from the list of code
segments to the answer area and arrange them in the correct order.
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Answer:
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Explanation:
Box 1:
First create a hash key using the certificate.
Not AES: AES is not based on hashing.
Box 2:
Add a column with varbinary data type.
Box 3:
Box 4:
Note:
* There are a few different hashing algorithms
available in SQL Server 2005: MD2, MD4, MD5, SHA, SHA1, with each having pros
and cons.
* In cryptography, SHA-1 is a cryptographic hash
function designed by the United States National
Security Agency and published by the United States
NIST as a US Federal Information Processing Standard . SHA stands for "
secure hash algorithm ". The four SHA algorithms are structured
differently and are distinguished as SHA-0 , SHA-1 , SHA-2 , andSHA-3 . SHA-1
is very similar to SHA-0, but corrects an error in the original SHA hash
specification that led to significant weaknesses. The SHA-0 algorithm was not
adopted by many applications. SHA-2 on the other hand significantly differs
from the SHA-1 hash function.
SHA-1 is the most widely used of the existing SHA hash
functions, and is employed in several widely used applications and protocols.
* To encrypt a column of data using a simple symmetric
encryption
In Object Explorer, connect to an instance of Database
Engine.
On the Standard bar, click New Query.
Copy and paste the following example into the query
window and click Execute.
USE AdventureWorks2012;
--If there is no master key, create one now.
IF NOT EXISTS
(SELECT * FROM sys.symmetric_keys WHERE
symmetric_key_id = 101)
CREATE MASTER KEY ENCRYPTION BY
PASSWORD =
'23987hxJKL95QYV4369#ghf0%lekjg5k3fd117r$$#1946kcj$n44ncjhdlj'
GO
CREATE CERTIFICATE Sales09
WITH SUBJECT = 'Customer Credit Card Numbers';
GO
CREATE SYMMETRIC KEY CreditCards_Key11
WITH ALGORITHM = AES_256
ENCRYPTION BY CERTIFICATE Sales09;
GO
-- Create a column in which to store the encrypted
data.
ALTER TABLE Sales.CreditCard
ADD CardNumber_Encrypted varbinary(128);
GO
-- Open the symmetric key with which to encrypt the
data.
OPEN SYMMETRIC KEY CreditCards_Key11
DECRYPTION BY CERTIFICATE Sales09;
-- Encrypt the value in column CardNumber using the
-- symmetric key CreditCards_Key11.
-- Save the result in column CardNumber_Encrypted.
UPDATE Sales.CreditCard
SET CardNumber_Encrypted =
EncryptByKey(Key_GUID('CreditCards_Key11')
, CardNumber, 1, HashBytes('SHA1', CONVERT( varbinary
, CreditCardID)));
GO
Reference: SQL Server 2012, Encrypt a Column of Data
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Question:
4
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You review a query that runs slowly. The query
accesses data in a table named Schemal.Table1. The following is the relevant
portion of the execution plan for the query:
You need to create the missing index. Which code
segment should you execute?
A. CREATE NCNCLUSTERED INDEX 1X1 on Schema1.Table1
(Column1) INCLUDE (Column4)
B. CREATE NCNCLUSTERED INDEX 1X1 on Schema1.Table1
(Column1)
C. CREATE NONCLUSTERED INDEX 1X1 on Schema1.Table1
(Column1, Column2, Column3) INCLUDE(Column4)
D. CREATE NONCLUSTERED INDEX 1X1 on Schema1.Table1
(Column1) INCLUDE(Column4) WHERE Column2 <> Column3
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Answer: C
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Question:
5
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You are creating a table to support an application
that will cache data outside of SQL Server. The application will detect whether
cached values were changed before it updates the values. You need to create the
table, and then verify that you can insert a row into the table. Which code
segment should you use?
A. Option A
B. Option B
C. Option C
D. Option D
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Answer: C
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Question:
6
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DRAG DROP
You run the following code segment:
After you add 10,000 rows to Customers, you discover
that the index is fragmented. You need to defragment the index in the least
amount of time. Which code segment should you execute? To answer, drag the
appropriate value to the correct location in the code segment in the answer
area. (Answer choices may be used once, more than once, or not at all.)
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Answer:
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Explanation:
Note:
Locking the table during the process and not
recomputing statistics would be the fastest.
* Online = OFF
Table locks are applied for the duration of the index
operation. An offline index operation that creates, rebuilds, or drops a
clustered, spatial, or XML index, or rebuilds or drops a nonclustered index,
acquires a Schema modification (Sch-M) lock on the table. This prevents all
user access to the underlying table for the duration of the operation. An
offline index operation that creates a nonclustered index acquires a Shared (S)
lock on the table. This prevents updates to the underlying table but allows
read operations, such as SELECT statements.
* STATISTICS_NORECOMPUTE = ON
Out-of-date statistics are not automatically
recomputed.
Reference: ALTER INDEX (Transact-SQL)
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