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单选题
You are creating a cluster. The tables in the cluster have a relatively uniform distribution of values in the index column and the queries against the clustered table will almost use an equality operator to retrieve the desired row. Which type of cluster will you create？（）
A
Index cluster
B
Hash cluster
C
Sorted Hash cluster
D
Real Application Cluster
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A Windows Azure application retrieves data from SQL Azure. You need to recommend an approach for improving application query performance. What should you recommend？（）A、 Create a database view to retrieve the data.B、 Use a clustered index on the SQL Azure database tables.C、 Open a new database connection when an operation times out.D、 Create SQL Azure database table indexes basedon application queries
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单选题You are using Oracle Enterprise Manager to estimate the size of a table to be created. You have typed data regarding the column names， data types， sizes of the columns， and the projected number of rows in the table. Which additional information does the Oracle Enterprise Manager return？（）A
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space required for the bitmap index on a column of the tableC
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单选题A Windows Azure application retrieves data from SQL Azure. You need to recommend an approach for improving application query performance. What should you recommend？（）A
Create a database view to retrieve the data.B
Use a clustered index on the SQL Azure database tables.C
Open a new database connection when an operation times out.D
Create SQL Azure database table indexes basedon application queries
考题
单选题You are maintaining a database of credit card transactions. You want the data to be returned automatically in the chronological order of the credit card numbers without using the ORDER BY clause in the query. Which type of cluster will you use to obtain the desired result？（）A
Hash clusterB
Index clusterC
Sorted hash clusterD
Real Application cluster
考题
单选题In one of your online transaction processing （OLTP） applications， most users frequently modify the values， including the key values， of the application tables. Some users generate application reports by using multiple application tables. What is the best table structure that you can use to gain optimal performance？（）A
Heap tableB
Object tableC
External tableD
Clustered tableE
Global temporary tableF
Index-organized table （IOT）
考题
单选题In your test database， you have created the ORDERS table as an index-organized table （IOT）. To facilitate faster querying， you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrees when users perform a large volume of transactions. While investigating the reason， you find that the mapping table segment is fragmented， leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data？（）A
Export and import the mapping table.B
Drop and re-create the mapping table.C
Truncate the mapping table and reinsert the values.D
Use the ALTER TABLE .. REBUILD command to defragment the mapping table.
考题
单选题While designing your database， you have created the EMPLOYEES table as an index/x7forganized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）A
A primary key must have been created.B
A mapping table must have been created.C
An overflow tablespace must have been specified.D
The PCTTHRESHOLD option must have been specified.
考题
单选题You are a professional level SQL Sever 2008 Database Administrator in an international corporation named Wiikigo. You are experienced in managing databases in an enterprise-level organization, optimizing and sustaining the database life cycle. In the company, your job is to implement solutions on security, troubleshooting, deployment and optimization. A SQL Server 2008 infrastructure is managed by you. A maintenance strategy should be designed for a mission-critical database, and a large table named Orders is contained by the database. Index maintenance operations are contained in the design plan. When you design the strategy, the facts listed below should be taken into consideration. First, the users continuously access to the Orders table in the database. Secondly, a column of the xml data type is contained by Orders table. Thirdly, the new rows are regularly added to the Orders table. Fourthly, the average fragmentation for the clustered index of the Orders table is no more than 2 percent. A strategy should be designed to have the performance of the queries on the table optimized. Which action will you perform?（）A
The clustered index of the Orders table should be dropped.B
The clustered index of the Orders table offline should be rebuilt once a month.C
The clustered index of the Orders table should be excluded from scheduled reorganizing or rebuilding operations.D
The clustered index of the Orders table should be reorganized by reducing the fill factor.
考题
单选题In which scenario will you create a sorted hash cluster？ （）A
if the application uses queries joining tables only occasionallyB
if the full table scan is executed often on only one table of the clustered tablesC
if the data for all the rows of a cluster key value exceeds one or two Oracle blocksD
when you want the data to be returned automatically in the chronological order
考题
单选题In which scenario will you create a hash cluster？（）A
when you want the data to be returned automatically in chronological orderB
if the application uses queries joining tables only occasionallyC
if the queries against the clustered table use the equality operator （=） to retrieve the desired rowD
if the full table scan is executed often on only one of the clustered tables
考题
单选题While designing your database， you have created the EMPLOYEES table as an index-organized table （IOT）. You want to create a bitmap index on the JOB_ID column to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）A
A primary key must have been created.B
A mapping table must have been created.C
An overflow tablespace must have been specified.D
The PCTTHRESHOLD option must have been specified.
考题
单选题You work in a company which is named Wiikigo Corp. The company uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database which is named Sellings in the instance. The Sellings database contains a table named Productions. The table is used to stores information about all types of products. The Productions table is often queried by users on the basis of the RadioSize column. The RadioSize column contains the NULL value for all products other than Radios. Currently no index exists on the RadionSize column. According to the requirement of the company CIO, you have to optimize the query performance and reduce the effect on the disk space to the least. So what action should you perform to achieve this goal?（）A
On the Products table, you should create a view. B
On the RadioSize column, you should create a clustered index C
On the RadioSize column, you should create a filtered index D
On the RadioSize column, you should create a unique clustered index
考题
单选题You want to access employee details contained in flat files as part of the EMPLOYEE table. You planto add a new column to the EMPLOYEE table to achieve this. Which data type would you use for the new column（）A
CLOBB
BLOBC
BFILED
LONG RAW
考题
单选题While designing the database for one of your online transaction processing （OLTP） applications， you want to achieve the following： a） high availability of data b） faster primary key access to the table data c） compact storage for the table Which type of tables would you use to achieve these objectives？（）A
heap tablesB
object tablesC
partitioned tablesD
index-organized tables （IOTs）
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