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Designing Database Solutions for Microsoft SQL Server

Question No: 1 – (Topic 1)

You need to recommend a solution for Application1 that meets the security requirements. What should you include in the recommendation?

  1. Signed stored procedures

  2. Certificate Authentication

  3. Encrypted columns

  4. Secure Socket Layer (SSL)

Answer: A Explanation:

  • Scenario:

    / Data from Database2 will be accessed periodically by an external application named Application1

    / Application developers must be denied direct access to the database tables. Applications must be denied direct access to the tables.

    Reference:

    Tutorial: Signing Stored Procedures with a Certificate

    Question No: 2 – (Topic 1)

    You need to recommend a solution to allow application users to perform tables. The solution must meet the business requirements.

    What should you recommend?

    1. Create a Policy-Based Management Policy.

    2. Create a user-defined database role and add users to the role.

    3. Create stored procedures that use EXECUTE AS clauses.

    4. Create functions that use EXECUTE AS clauses.

    Answer: D Explanation:

  • c Clause (Transact-SQL)

    In SQL Server you can define the execution context of the following user-defined modules: functions (except inline table-valued functions), procedures, queues, and triggers.

    Reference: Using EXECUTE AS in Modules

    Question No: 3 – (Topic 1)

    You need to recommend a database reporting solution that meets the business requirements.

    What should you include in the recommendation?

    1. Data collection

    2. Performance Monitor

    3. A maintenance plan

    4. A dynamic management view

    Answer: A Explanation:

  • Scenario: System administrators must be able to run real-time reports on disk usage.

  • The data collector provides an historical report for each of the System Data collection sets. Each of the following reports use data that is stored in the management data warehouse:

    Disk Usage Summary Query Statistics History Server Activity History

    You can use these reports to obtain information for monitoring system capacity and troubleshooting system performance.

    Reference:

    System Data Collection Set Reports

    Question No: 4 – (Topic 1)

    You need to recommend a solution for the deployment of SQL Server 2014. The solution must meet the business requirements.

    What should you include in the recommendation?

    1. Create a new instance of SQL Server 2014 on the server that hosts the SQL Server 2008 instance.

    2. Upgrade the existing SQL Server 2008 instance to SQL Server 2014.

    3. Deploy two servers that have SQL Server 2014 installed and implement Failover Clustering.

    4. Deploy two servers that have SQL Server 2014 installed and implement database mirroring.

    Answer: C Explanation:

    Scenario: The databases must be available if the SQL Server service fails. Reference:

    Failover Clustering Overview

    Windows Server Failover Clustering (WSFC) with SQL Server

    Question No: 5 – (Topic 1)

    You need to recommend a solution to improve the performance of usp.UpdateInventory. The solution must minimize the amount of development effort.

    What should you include in the recommendation?

    1. A table variable

    2. A common table expression

    3. A subquery

    4. A cursor

    Answer: A Explanation:

    *Scenario: Database2 will contain a stored procedure named usp_UpdateInventory. Usp_UpdateInventory will manipulate a table that contains a self-join that has an unlimited number of hierarchies.

  • A table variable can be very useful to store temporary data and return the data in the table format.

    table

  • Example: The following example uses a self-join to find the products that are supplied by more than one vendor.

    Because this query involves a join of the ProductVendor table with itself, the ProductVendor table appears in two roles. To distinguish these roles, you must give the ProductVendor table two different aliases (pv1 and pv2) in the FROM clause. These aliases are used to qualify the column names in the rest of the query. This is an example of the self-join Transact-SQL statement:

    USE AdventureWorks2008R2; GO

    SELECT DISTINCT pv1.ProductID, pv1.VendorID FROM Purchasing.ProductVendor pv1

    INNER JOIN Purchasing.ProductVendor pv2 ON pv1.ProductID = pv2.ProductID

    AND pv1.VendorID lt;gt; pv2.VendorID

    ORDER BY pv1.ProductID

    Incorrect:

    Not B: Using a CTE offers the advantages of improved readability and ease in maintenance of complex queries. The query can be divided into separate, simple, logical building blocks. These simple blocks can then be used to build more complex, interim CTEs until the final result set is generated.

    Question No: 6 – (Topic 1)

    You need to recommend an isolation level for usp_UpdateOrderDetails. Which isolation level should you recommend?

    1. Read committed

    2. Repeatable read

    3. Read uncommitted

    4. Serializable

    Answer: B Explanation:

  • Scenario: Databasel will also contain a stored procedure named usp_UpdateOrderDetails. The stored procedure is used to update order information. The stored procedure queries the Orders table twice each time the procedure executes. The rows returned from the first query must be returned on the second query unchanged along with any rows added to the table between the two read operations.

  • REPEATABLE READ

    Specifies that statements cannot read data that has been modified but not yet committed by other transactions and that no other transactions can modify data that has been read by the current transaction until the current transaction completes.

    Reference: Transaction Isolation Levels

    Question No: 7 – (Topic 1)

    You need to recommend a feature to support your backup solution. What should you include in the recommendation?

    1. Transparent Data Encryption (TDE)

    2. Column-level encryption

    3. An NTFS file permission

    4. A Secure Sockets Layer (SSL)

    Answer: A Explanation:

  • Scenario: You must encrypt the backup files to meet regulatory compliance requirements. The encryption strategy must minimize changes to the databases and to the applications.

  • Transparent data encryption (TDE) performs real-time I/O encryption and decryption of the data and log files. The encryption uses a database encryption key (DEK), which is stored in the database boot record for availability during recovery.

    Reference: Transparent Data Encryption (TDE)

    Question No: 8 – (Topic 1)

    You need to recommend a disk monitoring solution that meets the business requirements. What should you include in the recommendation?

    1. An audit

    2. A dynamic management view

    3. A maintenance plan

    4. An SQL Server Agent alert

    Answer: B

    Reference:

    Dynamic Management Views and Functions (Transact-SQL)

    Question No: 9 – (Topic 1)

    During performance testing, you discover that database INSERT operations against the Inventory table are slow.

    You need to recommend a solution to reduce the amount of time it takes to complete the INSERT operations.

    What should you recommend?

    1. Partition the nonclustered index.

    2. Partition the Inventory table.snapshot replication

    3. Create a column store index.Master Data Services

    4. Drop the clustered index.change data capture

    Answer: A Explanation:

    Scenario: Database2 will contain a table named Inventory. Inventory will contain over 100 GB of data. The Inventory table will have two indexes: a clustered index on the primary key and a nonclustered index. The column that is used as the primary key will use the identity property.

    Question No: 10 – (Topic 1)

    You need to recommend a solution to synchronize Database2 to App1_Db1. What should you recommend?

    1. Change data capture

    2. Snapshot replication

    3. Master Data Services

    4. Transactional replication

    Answer: D Explanation:

    Scenario:

  • Data from Database2 will be accessed periodically by an external application named Application1. The data from Database2 will be sent to a database named App1_Db1 as soon as changes occur to the data in Database2.

  • All data in Database2 is recreated each day and does not change until the next data creation process.

    Reference:

    Transactional Replication

    Topic 2, Contoso Ltd Overview

    Application Overview

    Contoso, Ltd., is the developer of an enterprise resource planning (ERP) application. Contoso is designing a new version of the ERP application. The previous version of the ERP application used SQL Server 2008 R2. The new version will use SQL Server 2014. The ERP application relies on an import process to load supplier data. The import process updates thousands of rows simultaneously, requires exclusive access to the database, and runs daily.

    You receive several support calls reporting unexpected behavior in the ERP application. After analyzing the calls, you conclude that users made changes directly to the tables in the database.

    Tables

    The current database schema contains a table named OrderDetails. The OrderDetails table contains information about the items sold for each purchase order.

    OrderDetails stores the product ID, quantities, and discounts applied to each product in a purchase order. The product price is stored in a table named Products.

    The Products table was defined by using the SQL_Latin1_General_CPl_CI_AS collation. A column named ProductName was created by using the varchar data type.

    The database contains a table named Orders. Orders contain all of the purchase orders from the last 12 months. Purchase orders that are older than 12 months are stored in a table named OrdersOld.

    Stored Procedures

    The current version of the database contains stored procedures that change two tables. The following shows the relevant portions of the two stored procedures:

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    Customer Problems Installation Issues

    The current version of the ERP application requires that several SQL Server logins be set up to function correctly. Most customers set up the ERP application in multiple locations and must create logins multiple times.

    Index Fragmentation Issues

    Customers discover that clustered indexes often are fragmented. To resolve this issue, the customers defragment the indexes more frequently.

    All of the tables affected by fragmentation have the following columns that are used as the clustered index key:

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    Backup Issues

    Customers who have large amounts of historical purchase order data report that backup time is unacceptable.

    Search Issues

    Users report that when they search product names, the search results exclude product names that contain accents, unless the search string includes the accent.

    Missing Data Issues

    Customers report that when they make a price change in the Products table, they cannot retrieve the price that the item was sold for in previous orders.

    Query Performance Issues

    Customers report that query performance degrades very quickly. Additionally, the customers report that users cannot run queries when SQL Server runs maintenance tasks.

    Import Issues

    During the monthly import process, database administrators receive many supports call from users who report that they cannot access the supplier data. The database administrators want to reduce the amount of time required to import the data.

    Design Requirements

    File Storage Requirements

    The ERP database stores scanned documents that are larger than 2 MB. These files must only be accessed through the ERP application. File access must have the best possible read and write performance.

    Data Recovery Requirements

    If the import process fails, the database must be returned to its prior state immediately.

    Security Requirements

    You must provide users with the ability to execute functions within the ERP application, without having direct access to the underlying tables.

    Concurrency Requirements

    You must reduce the likelihood of deadlocks occurring when Sales.Proc1 and Sales.Proc2 execute.

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