单选题You are configuring the data source for an Oracle database. You will need to specify a test table for WebLogic to test the status of the database. Which option should you choose?()A a table name which has 100s of recordsB a table name which has 10s of 

题目
单选题
You are configuring the data source for an Oracle database. You will need to specify a test table for WebLogic to test the status of the database. Which option should you choose?()
A

a table name which has 100s of records

B

a table name which has 10s of records

C

a table name which has empty records

D

a table name which has 1000s of records

E

never use a table name

参考答案和解析
正确答案: D
解析: 暂无解析
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相似问题和答案

第1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 which is named Instance01. Instance01 contains a database which is named SellingHelp. There isthe Products table in the SellingHelp database. Now according to the company requirement, the Products table has to be replicated to the SQL Server instances installed in laptopscomputers. You have to create a Replication topology to perform this. The Products table is updated from Instance01 when the laptops reconnect to the corporate network. The Products table on Instance01 is frequently updated between reconnections. You must make sure that you can implement the Replication topology along with the Subscription type successfully and meanwhile reduce the bandwidth usage to the least.  So what action should you perform to achieve this goal?()  

  • A、You should implement the Snapshot Replication topology along with a Push Subscription. 
  • B、You should implement the Merge Replication topology along with a Pull Subscription. 
  • C、You should implement the Snapshot Replication topology along with a Pull Subscription. 
  • D、You should implement the Transactional Replication topology along with a Pull Subscription

正确答案:B

第2题:

In your test database, you have created the ORDERS table as an index/x7forganized 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 degrades 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 re­create the mapping table
  • C、truncate the mapping table and reinsert the values
  • D、use the ALTER TABLE .. REBUILD command to defragment the mapping table

正确答案:B

第3题:

You are the administrator of a SQL Server 2000 database. You import a table of geographic information from a Microsoft access database into a SQL Server 2000 database. The table has 12,000 rows. Each row averages 5,000 bytes. The table contains lockup data that does not change.

You want to minimize the size of the data file and the time required to back up the data. Which two actions should you take? (Each correct answer presents part of the solution. Choose two)

A. Create a 60-MB data file named geography.ndf

B. Create a 95-MB data file named geography.ndf

C. Create a 60-MB data file named geography.mdf

D. Create a 95-MB data file named geography.mdf

E. Place the table in the PRIMARY filegroup.

F. Place the table in a new filegroup named LOCATION.


正确答案:BF
B,F 解析:Explanation: As SQL Server 2000 supports backing up or restoring individual files or file groups within a database, it is possible to reduce back up time by creating a separate data file table so that only that table will be backed up. This separate data file will have to be a secondary data file because a database can only have one primary data file, which is identified by the .mdf extension, it is the starting point of the database and locates all the other files in the database. Secondary data files are identified by the .ndf extension and comprise all of the data files except the primary data file. A database need not have a secondary data file and it is also possible to create multiple secondary data files on database.

Rows are stored in data pages. Rows cannot cross different data pages. The size of data page in SQL Server 2000 (or SQL 7.0) is 8,192 bytes. We can only store one row in every data page in this scenario. Thus, to estimate the size of the tale we would need to multiply the number of rows, 12,000 in this scenario, by 8,192 bytes. This will give us a table size of 98,304,000 bytes. As computer data storage is calculated using the binary rather than the decimal system, there is 1,024 bytes per Kb and 1,024 Kb per MB, rather than 1,000 bytes per Kb and 1,000 Kb per MB, we thus require a database size of at least 93.75 MB.

Incorrect Answers:
A: The data size of this table is insufficient as a minimum size of 93.75 MB is required.

C: The data size of this table is insufficient as a minimum size of 93.75 MB is required. Furthermore, the .mdf file extension indicate in this solution implies that the data file will be placed in the primary filegroup. It would thus not be possible to backup the data file pertaining to the table only.

D: The .mdf file extension indicate in this solution implies that the data file will be placed in the primary filegroup. It would thus not be possible to backup the data file pertaining to the table only.

E: As SQL Server 2000 supports backing up or restoring individual files or file groups within a database, it is possible to reduce back up time by creating a separate data file table so that only that table will be backed up. This separate data file will have to be a secondary data file because a database can only have one primary data file, which is identified by the .mdf extension, it is the starting point of the database and locates all the other files in the database.

第4题:

You plan to move data from a flat file to a table in your database. You decide to use SQL*Loader direct pathload method to perform this task. The table in which you plan to load data is an important table having variousintegrity constraints defined on it.  Which constraints will remain enabled by default during this operation()

  • A、CHECK
  • B、UNIQUE
  • C、NOT NULL
  • D、PRIMARY KEY
  • E、FOREIGN KEY

正确答案:B,C,D

第5题:

You are creating a form that will access an Oracle8 database. On which three sources can you base a data block?()

  • A、BFILE 
  • B、REF column 
  • C、Object table 
  • D、Column object 
  • E、INSTEAD-OF trigger

正确答案:B,C,D

第6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 table has a table named BillDetails which has a clustered primary key named BillId on the BillId column. The BillDetails table has a single XML column named GoodsDetails. The XML column has an XML index and XML data are stored in this XML column. A new column named GoodsID is added to the BillDetails table. GoodsID must be included in the primary key.  So what action should you perform to achieve this goal?()  

  • A、You should drop the XML index on the table. Modify the primary key. Recreate the XML index 
  • B、You should alter the XML index and set the ALLOW_ROW_LOCKS = OFF option. Alter the primary key and set the ALLOW_ROW_LOCKS = ON option. 
  • C、You should move the XML data to a temporary table. Clear the XML data from the original table by setting the GoodsDetails column to NULL. Modify the primary key. Repopulate the ProductSpecs column. 
  • D、You should disable the XML index on the GoodsDetails column. Modify the primary key.Enable the XML index on the ProductSpecs column.

正确答案:A

第7题:

On Monday, you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday, you have a requirement to restore the DEPT table from the recycle bin. Which statement is correct?()

  • A、 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.
  • B、 You can restore the DEPT table by using the Oracle Flashback Drop feature, provided you use the RENAME TO clause.
  • C、 You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.
  • D、 You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.

正确答案:B

第8题:

You are the administrator of a new multiprocessor SQL Server 2000 computer. You are migrating data from other database management systems to this server. You need to load data from two data files into a new table on the server. The table is empty and has no indexes.

You want to complete the data load as quickly as possible. What should you do? (Each correct answer represents part of the solution. Choose all that apply.)

A.Apply a bulk update lock to the table.

B.Use separate client connections to load the files into the table simultaneously.

C.Create a clustered index on the table.

D.Specify the Full Recovery model for the database.

E.Specify the Bulk-Logged Recovery model for the database.


正确答案:ABE
解析:Explanation:
A: Bulk update locks are taken when bulk copying data into a table and either the TABLOCK hint is specified, or the table lock on bulk load table option is set using sp_tableoption. Bulk update locks allow processes to bulk copy data concurrently into the same table while preventing other processes that are not bulk copying data from accessing the table. In this scenario the bulk update lock would meet the requirement that data should be loaded as quickly as possible.

B: SQL Server 2000 allows data to be bulk copied into a single table from multiple clients in parallel using the bcp utility or BULK INSERT statement. This can improve the performance of data load operations. To bulk copy data into an instance of SQL Server in parallel, the database must be set to Bulk-Logged Recovery, the TABLOCK hint must be specified, and the table must not have any indexes.

E: By specifying the Bulk-Logged Recovery model, the logging for all SELECT INTO, CREATE INDEX, and bulk loading data operations will be minimal and will therefore require less log space while also improving performance.

Incorrect Answers:
C: When data is bulk copied into a single table from multiple clients in parallel using the bcp utility or BULK INSERT statement to improve the performance of data load operations, the database must be set to Bulk-Logged Recovery, the TABLOCK hint must be specified, and the table must not have any indexes.

D: When data is bulk copied into a single table from multiple clients in parallel using the bcp utility or BULK INSERT statement to improve the performance of data load operations, the database must be set to Bulk-Logged Recovery, the TABLOCK hint must be specified, and the table must not have any indexes.

第9题:

You are configuring the data source for an Oracle database. You will need to specify a test table for WebLogic to test the status of the database. Which option should you choose?()

  • A、a table name which has 100s of records
  • B、a table name which has 10s of records
  • C、a table name which has empty records
  • D、a table name which has 1000s of records
  • E、never use a table name

正确答案:C

第10题:

You plan to move data from a flat file to a table in your database. You decide to use SQL*Loader directpath load method to perform this task. The table in which you plan to load data is an important tablehaving various integrity constraints defined on it.  Which constraints will remain enabled by default during this operation()

  • A、CHECK
  • B、UNIQUE
  • C、NOT NULL
  • D、PRIMARY KEY
  • E、FOREIGN KEY

正确答案:B,C,D

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