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Designing Database Solutions for Microsoft SQL Server

Question No: 21 – (Topic 2)

You need to recommend a solution that addresses the index fragmentation and index width issue.

What should you include in the recommendation? (Each correct answer presents part of the solution. Choose all that apply.)

  1. Change the data type of the lastModified column to smalldatetime.

  2. Remove the lastModified column from the clustered index.

  3. Change the data type of the modifiedBy column to tinyint.

  4. Change the data type of the id column to bigint.

  5. Remove the modifiedBy column from the clustered index.

  6. Remove the id column from the clustered index.

Answer: B,E Explanation:

Scenario: 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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Question No: 22 DRAG DROP – (Topic 2)

You need to recommend which statement should be used to update SalesOrder.

How should you recommend completing the statement? To answer, drag the appropriate elements to the correct locations. Each element may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

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Answer:

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Explanation:

Ensurepass 2017 PDF and VCE

* Syntax is:

SET TRANSACTION ISOLATION LEVEL

{ READ UNCOMMITTED

| READ COMMITTED

| REPEATABLE READ

| SNAPSHOT

| SERIALIZABLE

} [ ; ]

SNAPSHOT specifies that data read by any statement in a transaction will be the transactionally consistent version of the data that existed at the start of the transaction.

  • You begin a transaction with keywords: BEGIN TRANSACTION

    Topic 3, Fabrikam, Inc Background

    Corporate Information

    Fabrikam, Inc. is a retailer that sells electronics products on the Internet. The company has a headquarters site and one satellite sales office.

    You have been hired as the database administrator, and the company wants you to change the architecture of the Fabrikam ecommerce site to optimize performance and reduce downtime while keeping capital expenditures to a minimum. To help with the solution, Fabrikam has decided to use cloud resources as well as on-premise servers.

    Physical Locations

    All of the corporate executives, product managers, and support staff are stationed at the headquarters office. Half of the sales force works at this location.

    There is also a satellite sales office. The other half of the sales force works at the satellite office in order to have sales people closer to clients in that area. Only sales people work at the satellite location.

    Problem Statement

    To be successful, Fabrikam needs a website that is fast and has a high degree of system uptime. The current system operates on a single server and the company is not happy with the single point of failure this presents. The current nightly backups have been failing due to insufficient space on the available drives and manual drive cleanup often needing to happen to get past the errors. Additional space will not be made available for backups on the HQ or satellite servers. During your investigation, you discover that the sales force reports are causing significant contention.

    Configuration Windows Logins

    The network administrators have set up Windows groups to make it easier to manage

    security. Users may belong to more than one group depending on their role. The groups have been set up as shown in the following table:

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    Server Configuration

    The IT department has configured two physical servers with Microsoft Windows Server 2012 R2 and SQL Server 2014 Enterprise Edition and one Windows Azure Server. There are two tiers of storage available for use by database files only a fast tier and a slower tier. Currently the data and log files are stored on the fast tier of storage only. If a possible use

    case exists, management would like to utilize the slower tier storage for data files. The servers are configured as shown in the following table:

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    Database

    Currently all information is stored in a single database called ProdDB, created with the following script:

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    The Product table is in the Production schema owned by the ProductionStaff Windows group. It is the main table in the system so access to information in the Product table should be as fast as possible.

    The columns in the Product table are defined as shown in the following table:

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    The SalesOrderDetail table holds the details about each sale. It is in the Sales schema owned by the SalesStaff Windows group.

    This table is constantly being updated, inserted into, and read.

    The columns in the SalesOrderDetail table are defined as shown in the following table:

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    Database Issues

    The current database does not perform well. Additionally, a recent disk problem caused the system to go down, resulting in lost sales revenue. In reviewing the current system, you found that there are no automated maintenance procedures. The database is severely fragmented, and everyone has read and write access.

    Requirements Database

    The database should be configured to maximize uptime and to ensure that very little data is

    lost in the event of a server failure. To help with performance, the database needs to be modified so that it can support in-memory data, specifically for the Product table, which the CIO has indicated should be a memory-optimized table. The auto-update statistics option is set off on this database.

    Only product managers are allowed to add products or to make changes to the name, description, price, cost, and supplier. The changes are made in an internal database and pushed to the Product table in ProdDB during system maintenance time. Product managers and others working at the headquarters location also should be able to generate reports that include supplier and cost information.

    Customer data access

    Customers access the company#39;s website to order products, so they must be able to read product information such as name, description, and price from the Product table. When customers place orders, stored procedures called by the website update product quantity- on-hand values. This means the product table is constantly updated at random times.

    Customer support data access

    Customer support representatives need to be able to view and not update or change product information. Management does not want the customer support representatives to be able to see the product cost or any supplier information.

    Sales force data access

    Sales people at both the headquarters office and the satellite office must generate reports that read from the Product and SalesOrderDetail tables. No updates or inserts are ever made by sales people. These reports are run at random times and there can be no reporting downtime to refresh the data set except during the monthly maintenance window. The reports that run from the satellite office are process intensive queries with large data sets. Regardless of which office runs a sales force report, the SalesOrderDetail table should only return valid, committed order data; any orders not yet committed should be ignored.

    Historical Data

    The system should keep historical information about customers who access the site so that sales people can see how frequently customers log in and how long they stay on the site. The information should be stored in a table called Customer Access. Supporting this requirement should have minimal impact on production website performance.

    Backups

    The recovery strategy for Fabrikam needs to include the ability to do point in time restores and minimize the risk of data loss by performing transaction log backups every 15 minutes.

    Database Maintenance

    The company has defined a maintenance window every month when the server can be unavailable. Any maintenance functions that require exclusive access should be accomplished during that window.

    Project milestones completed

    ->Revoked all existing read and write access to the database, leaving the schema ownership in place.

    ->Configured an Azure storage container secured with the storage account name MyStorageAccount with the primary access key StorageAccountKey on the cloud file server.

    ->SQL Server 2014 has been configured on the satellite server and is ready for use.

    ->On each database server, the fast storage has been assigned to drive letter F:, and the slow storage has been assigned to drive letter D:.

    Question No: 23 – (Topic 3)

    You need to configure security on the Product table for customer support representatives. Which two actions should you perform? Each correct answer presents part of the solution.

    Choose two.

    1. Create a view called CustProduct that includes columns ProductID. ProductName, Product Description, QuantityOnHand, ProductPrice, ProductCost, and ProductSupplierID.

    2. GRANT ALL on CustProduct TO OurDomain\CustomerSupport.

    3. Create a user-defined data type called CustProduct that includes columns ProductID, ProductName, Product Description, and ProductPrice.

    4. Create a view called CustProduct that includes columns ProductID, ProductName, Product Description, QuantityOnHand, and ProductPrice.

    5. GRANT SELECT on CustProduct TO OurDomain\CustomerSupport.

    6. GRANT SELECT on CustProduct TO public.

    Answer: A,E Explanation:

    Give access to CustomerSupport through a view. The view must include all these columns (refer to scenario).

    GRANT Object Permissions (Transact-SQL)

    Question No: 24 – (Topic 3)

    You need to implement changes to the system to reduce contention and improve performance of the SalesOrderDetail table.

    Which three actions should you perform? Each correct answer presents part of the solution. Choose three.

    1. Use (SNAPSHOT] hints in the report queries

    2. ALTER DATABASE [ProdDB] SET READ_COMMITTED_SNAPSHOT ON

    3. ALTER DATABASE [ProdDB] SET READ_COMMITTED_SNAPSHOT OFF

    4. SET TRANSACTION ISOLATION LEVEL SNAPSHOT

    5. Use (TABLOCK) hints in the report queries

    6. SET TRANSACTION ISOLATION LEVEL SERIALIZABLE

    7. ALTER DATABASE [ProdDB] SET ALLOW_SNAPSHOT_ISOLATION ON

    8. Use (SNAPSHOT] hints in the update statements

    Answer: A,B,F Explanation:

  • Scenario:

    The SalesOrderDetail table holds the details about each sale. It is in the Sales schema owned by the SalesStaff Windows group.

    This table is constantly being updated, inserted into, and read.

  • Regardless of which office runs a sales force report, the SalesOrderDetail table should only return valid, committed order data; any orders not yet committed should be ignored.

  • READ_COMMITTED_SNAPSHOT { ON | OFF } ON

Enables Read-Committed Snapshot option at the database level. When it is enabled, DML statements start generating row versions even when no transaction uses Snapshot Isolation. Once this option is enabled, the transactions specifying the read committed isolation level use row versioning instead of locking. When a transaction runs at the read committed isolation level, all statements see a snapshot of data as it exists at the start of the statement.

OFF

Turns off Read-Committed Snapshot option at the database level. Transactions specifying the READ COMMITTED isolation level use locking.

ALTER DATABASE SET Options (Transact-SQL) SET Statements (Transact-SQL)

Question No: 25 DRAG DROP – (Topic 3)

You need to distribute functionality across the three servers.

Which function should you assign to each server? To answer, drag the appropriate functions to the correct servers. Each function may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

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Answer:

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Explanation:

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Note:

  • Scenario: The current nightly backups have been failing due to insufficient space on the available drives and manual drive cleanup often needing to happen to get past the errors. Additional space will not be made available for backups on the HQ or satellite servers.

    Question No: 26 DRAG DROP – (Topic 3)

    You need to create a job to automate some database maintenance tasks.

    Which code fragment should you use in each location in the command to complete one of the commands you will need to include in the job? To answer, drag the appropriate lines of code to the correct locations in the command. Each line of code may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.

    Ensurepass 2017 PDF and VCE

    Answer:

    Ensurepass 2017 PDF and VCE

    Explanation:

    Ensurepass 2017 PDF and VCE

    Note:

    UPDATE STATISTICS WITH FULLSCAN NORECOMPUTE

    Update statistics by using FULLSCAN and NORECOMPUTE

    The following example updates the Products statistics in the Product table, forces a full scan of all rows in the Product table, and turns off automatic statistics for the Products statistics.

    USE AdventureWorks2012; GO

    UPDATE STATISTICS Production.Product(Products) WITH FULLSCAN, NORECOMPUTE;

    GO

    UPDATE STATISTICS (Transact-SQL)

    Question No: 27 – (Topic 3)

    You need to change the ProdDB database.

    Which two database options should you change to meet the requirements? Each correct answer presents part of the solution. Choose two.

    1. CONTAINS FILESTREAM

    2. Change recovery model to FULL

    3. CONTAINMENT = PARTIAL

    4. Change recovery model to BULK_LOGGED

    5. COLLATE IN.MEMORY

    6. CONTAINS MEMORY OPTIMIZED DATA

    Answer: E,F Explanation:

  • Scenario: To help with performance, the database needs to be modified so that it can support in-memory data, specifically for the Product table, which the CIO has indicated should be a memory-optimized table.

Collations and Code Pages FileGroupDefinition.ContainsMemoryOptimizedData Property (Microsoft.SqlServer.TransactSql.ScriptDom)

Question No: 28 DRAG DROP – (Topic 3)

You need to create the CustomerAccess table to support the reporting and performance requirements.

Develop the solution by selecting and arranging the required code blocks in the correct order. You may not need all of the code blocks.

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Answer:

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Explanation:

Box 1:

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Box 2:

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Box 3:

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Box 4:

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Box 5:

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Note:

  • Scenario: During your investigation, you discover that the sales force reports are causing significant contention.

  • Step 1: add filegroup

  • Step 2: add file

  • Step 3: create table on filegroup

    / CREATE TABLE ON { lt;partition_schemegt; | filegroup | quot;defaultquot; } Specifies the partition scheme or filegroup on which the table is stored. ALTER DATABASE File and Filegroup Options (Transact-SQL) CREATE TABLE (SQL Server)

    Question No: 29 – (Topic 3)

    You need to write code that will allow the sales force to retrieve data for their reports with the least amount of effort.

    Which code should you use?

    Ensurepass 2017 PDF and VCE

    1. Option A

    2. Option B

    3. Option C

    4. Option D

    Answer: A Explanation:

  • Scenario

    / During your investigation, you discover that the sales force reports are causing significant contention.

    / Sales force data access

    Sales people at both the headquarters office and the satellite office must generate reports that read from the Product and SalesOrderDetail tables. No updates or inserts are ever made by sales people. These reports are run at random times and there can be no reporting downtime to refresh the data set except during the monthly maintenance window. The reports that run from the satellite office are process intensive queries with large data sets. Regardless of which office runs a sales force report, the SalesOrderDetail table should only return valid, committed order data; any orders not yet committed should be ignored.

    Question No: 30 – (Topic 3)

    What should you create in Azure to support the creation of the backups for DB1?

    1. an Azure Content Delivery Network (CDN) endpoint

    2. a Service Bus namespace

    3. a storage account

    4. a cloud service

    Answer: C

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