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You issued the following statement to monitor the usage of the index:        SQL> ALTER INDEX SCOTT.EMP_IDX MONITORING USAGE;   Which view will you query to ensure that the index is being monitored?()  

  • A、 INDEX_STATS
  • B、 DBA_INDEXES
  • C、 DBA_IND_COLUMNS
  • D、 V$OBJECT_USAGE

参考答案

更多 “ You issued the following statement to monitor the usage of the index:        SQL ALTER INDEX SCOTT.EMP_IDX MONITORING USAGE;   Which view will you query to ensure that the index is being monitored?()  A、 INDEX_STATSB、 DBA_INDEXESC、 DBA_IND_COLUMNSD、 V$OBJECT_USAGE” 相关考题
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考题 An index called ORD_CUSTNAME_IX has been created on the CUSTNAME column in the ORDERS table using the following command:SQLCREATE INDEX ord_custname_ix ON orders(custname);The ORDERS table is frequently queried using the CUSTNAME column in the WHERE clause.You want to check the impact on the performance of the queries if the index is not available. You do not want the index to be dropped or rebuilt to perform this test.Which is the most efficient method of performing this task?()A. disabling the indexB. making the index invisibleC. making the index unusableD. using the MONITORING USAGE clause for the index

考题 View the Exhibit for some of the parameter settings. You start a session and issue the following command:SQLCREATE INDEX emp_ename ON emp(ename) TABLESPACE users INVISIBLE;What is the outcome of the above command?()A. The index is not used by the optimizer but is maintained during DML operations.B. The index is not used by the optimizer and is not maintained during DML operations.C. The index is used by the optimizer only if a hint is specified in the query statement and is maintained during DML operations.D. The index is used by the optimizer only if a hint is specified in the query statement but is not maintained during DML operations.

考题 You moved the index EMP_NO_INDX from one tablespace to another and then issued the following command to rebuild the index EMP_NO_INDX:   SQL ALTER INDEX EMP_NO_INDX REBUILD ONLINE;   Which table allows the users to access the EMP_NO_INDX index while performing the rebuild operation?() A、 Index-organized tableB、 Mapping TableC、 Clustered TableD、 Journal Table

考题 You are a DBA of your company. You created a database named SALES on an Oracle 10g instance. You have defined an index named INDEX1 on the database table named INVENTORY. Users are complaining that queries accessing the INVENTORY table are running slow. Upon investigation you determine that the tablespace where the index is located is experiencing high I/O and you decide to relocate the index to another tablespace. Which of these will be the best way to accomplish this objective?()A、 Rebuild the index.B、 Coalesce the index.C、 Drop and re-create the index in the new tablespace.D、 Relocate the index using the ALTER INDEX...MOVE statement.

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考题 You have many users complaining about slow inserts into a large table. While investigating the reason, you find that the number of indexes on the table is high. You want to find out which indexes are not being used.  Which method would you follow to achieve this?()A、enable index monitoring and query the DBA_OBJECTS viewB、enable index monitoring and query the DBA_INDEXES viewC、enable index monitoring and query the V$OBJECT_USAGE viewD、enable index monitoring and view the DBA_INDEXTYPE_COMMENTS view

考题 You executed the following procedure to collect statistics regarding an index:       SQLANALYZE INDEX EMP_ID VALIDATE STRUCTURE;   Which view will you use to determine whether you need to rebuild the index or not?() A、 INDEX_STATSB、 DBA_INDEXESC、 DBA_IND_COLUMNSD、 V$OBJECT_USAGE

考题 The EMPLOYEES table has six indexes and DML operations are slow. Which command begins monitoring the EMPLOYEE_IDX_FK index to determine whether it has been used by an execution plan?()A、ALTER TABLE employees monitor index employee_idx_fk; B、ALTER INDEX employee_idx_fk monitoring on; C、ALTER TABLE employees monitor all indexes; D、ALTER INDEX employee_idx_fk monitoring usage; 

考题 In which scenarios would you rebuild an index?()A、 when you need to disable the index usageB、 when you need to change storage optionsC、 when you need to enable index monitoringD、 when you need to move the index to another tablespace

考题 You have created an Oracle 10g database named SALES, which will be used by an application named SalesOrders. Users of the SalesOrders application complain that application response time is slow when they generate reports. The SalesOrders application accesses a table that contains 10 million rows. You decide to create an index on this table using the NOLOGGING option so that the index creation process is completed in the least amount of time. Which of the following is NOT true about an index created with the NOLOGGING option?()A、 The index can be changed from NOLOGGING to LOGGINGB、 The index cannot be recovered even in the ARCHIVELOG mode.C、 The index can only be created if the base table is created with the NOLOGGING option.D、 The index can be recovered if you perform a backup after the CREATE INDEX statement.

考题 You are developing an ASP.NET MVC 2 Web application. The application contains a controller named Home Controller, which has an action named Index. The application also contains a separate area named Blog. A view within the Blog area must contain an Action Link that will link to the Index action of the Home Controller. You need to ensure that the Action Link in the Blog area links to the Index action of the HomeController. Which Action Link should you use?()A、Html.ActionLink("Home", "Index", "Home")B、Html.ActionLink("Home", "Index", "Home",  New With {.area = ""}, Nothing)C、Html.ActionLink("Home", "Index", "Home",  New With {.area = "Blog"}, Nothing)D、Html.ActionLink("Home", "Index", "Home",  New With {.area = "Home"}, Nothing)

考题 You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions, monitoring the database server, and design deployment. In the company, you major job is the deployment, maintenance and support of Microsoft SQL Server 2005.You work as a database administrator for your company. You find a problem that when the following query is executed, a SQL Server 2005 application will perform slowly. SELECT * FROM Orders WHERE OrderStatus = ’InProgress’ This query is executed by the application as an ad hoc query. In most occasions, this query performs much more quickly. The company has the OrderStatus column indexed. The value InProgress is included by only a small number of the rows. Nevertheless, the OrderStatus column index which is the most ideal for this query is not being utilized. The performance of this query should be enhanced. However, the application that executes the query should not be changed. In addition, the effect on end users should be cut to the least.  Which action should be performed to finish the task?()A、To finish the task, the index should be built by utilizing a FILLFACTOR of 10 percent.B、To finish the task, the index should be recreated to have all of the columns in the table included.C、To finish the task, an indexed view of the Orders table should be viewed.D、To finish the task, the statistics should be updated on the index.

考题 You work in a company which 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 named named Dworks in the instance. The Dworks database has a table named Bills which contains several indexes and a great amount of rows. An enterprise Web environment is supported by the database. Onthe Bills table 28% of the indexes have been fragmented. You have to defragment the indexes, making sure that you reduce the effect on database availability to the least.  In the ALTER INDEX statement, which option should be included?()A、Sort in tempdb B、Online C、Fill factor D、Pad index 

考题 You manage a SQL Server 2005 database that contains a table with many indexes.  You notice that data modification performance has degraded over time. You suspect that some of the indexes are unused. You need to identify which indexes were not used by any queries since the last time SQL Server 2005 started. Which dynamic management view should you use?()A、sys.dm fts index populationB、sys.dm exec query statsC、sys. dm db index usage statsD、sys.dm db index physical stats

考题 You are developing an ASP.NET MVC 2 Web application. The application contains a controller named HomeController, which has an action named Index. The application also contains a separate area named Blog. A view within the Blog area must contain an ActionLink that will link to the Index action of the HomeController. You need to ensure that the ActionLink in the Blog area links to the Index action of the HomeController. Which ActionLink should you use?()A、Html.ActionLink("Home", "Index", "Home")B、Html.ActionLink("Home", "Index", "Home", new {area = ""}, null)C、Html.ActionLink("Home", "Index", "Home", new {area = "Blog"}, null)D、Html.ActionLink("Home", "Index", "Home", new {area = "Home"}, null)

考题 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When does Oracle9i flag an index as being used in the V$OBJECT_USAGE view?()A During a query’s parse time only. B During a query’s execution time only. C During any kind of DML statement execution. D During the execution of an INSERT statement only.

考题 多选题Examine the following output: SQL SELECT index_name,status FROM dba_indexes WHERE status=’UNUSABLE’; INDEX_NAME STATUS------------------------------ ----------- EIND UNUSABLE Which two statements about the above index are true()AIt is ignored by the query optimizer.BIt is not used while the index is being rebuilt.CThe index cannot be rebuilt, and has to be re-created.DThe index is automatically rebuilt when used the next time

考题 多选题On your Oracle 12c database, you Issue the following commands to create indexes SQL CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; SQL CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); Which two statement are correct?()ABoth the indexes are created; however, only the ORD_COSTOMER index is visible.BThe optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan.COnly the ORD_CUSTOMER_IX1 index is created.DOnly the ORD_CUSTOMER_IX2 index is created.EBoth the indexes are updated when a new row is inserted, updated, or deleted In the orders table.

考题 单选题View the Exhibit and examine the structure of the EMP table. You executed the following command to add a primary key to the EMP table:   ALTER TABLE emp   ADD CONSTRAINT emp_id_pk  PRIMARY KEY (emp_id)   USING INDEX emp_id_idx;   Which statement is true regarding the effect of the command?()A  The PRIMARY KEY is created along with a new index.B  The PRIMARY KEY is created and it would use an existing unique index.C  The PRIMARY KEY would be created in a disabled state because it is using an existing index.D  The statement produces an error because the USING clause is permitted only in the CREATE TABLE command.

考题 单选题You moved the index EMP_NO_INDX from one tablespace to another and then issued the following command to rebuild the index EMP_NO_INDX:   SQL ALTER INDEX EMP_NO_INDX REBUILD ONLINE;   Which table allows the users to access the EMP_NO_INDX index while performing the rebuild operation?()A  Index-organized tableB  Mapping TableC  Clustered TableD  Journal Table

考题 单选题You issued the following statement to monitor the usage of the index:        SQL ALTER INDEX SCOTT.EMP_IDX MONITORING USAGE;   Which view will you query to ensure that the index is being monitored?()A  INDEX_STATSB  DBA_INDEXESC  DBA_IND_COLUMNSD  V$OBJECT_USAGE

考题 单选题The EMPLOYEES table has six indexes and DML operations are slow. Which command begins monitoring the EMPLOYEE_IDX_FK index to determine whether it has been used by an execution plan?()A ALTER TABLE employees monitor index employee_idx_fk; B ALTER INDEX employee_idx_fk monitoring on; C ALTER TABLE employees monitor all indexes; D ALTER INDEX employee_idx_fk monitoring usage; 

考题 多选题Examine the SQL statements that creates ORDERS table: For which columns would an index be automatically created when you execute the above SQL statement? ()ASER_NOBORDER_IDCSTATUSDPROD_IDEORD_TOTALFComposite index on ORDER_ID and ORDER_DATE

考题 单选题You executed the following procedure to collect statistics regarding an index:       SQLANALYZE INDEX EMP_ID VALIDATE STRUCTURE;   Which view will you use to determine whether you need to rebuild the index or not?()A  INDEX_STATSB  DBA_INDEXESC  DBA_IND_COLUMNSD  V$OBJECT_USAGE