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【单项选择题】

You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）

A、A.Immediately following statement execution 

B、B.After the ALTER TABLE DROP UNUSED COLUMNS command is issued 

C、C.After the ALTER TABLE SET UNUSED COLUMN command is issued 

D、D.After the ALTER TABLE MODIFY command is issued

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更多“You just issued the following statement: ALTER TABLE SALES DROP COLUMN PROFIT. Which of the following choices identifies when the column will actually be removed from Oracle?（）”相关的问题
第1题
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第2题
[单选题] On a Windows 2000 Professional computer， you run a shipping application that prints packing labels to a laser printer for every outgoing shipment， 24 hours per day. During peak hours， your company ships more than 1，000 packages per hour. You have just purchased a second identical laser printer to aid in printing. You want to configure the printers so that the jobs are load balanced. You connect the second laser printer to the computer. What must you do next？ （）

A、Enable bi-directional support.  B、Enable printer pooling.  C、Configure print spooling.  D、Configure print sharing.  

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第3题
[单选题] You work as an Exchange Administrator for Xxx .The company has a Windows 2008 Active Directorybased network.You have just finished deploying an Exchange 2010 server and migrating all mailboxes including resource mailboxes from Exchange Server 2003. After the migration from the Exchange 2003 server was complete， you noticed that the resource mailboxes were showing up as a shared mailbox and not a resource mailbox.You realize that you need to convert them to Exchange 2010 resource mailboxes.While logged into the Exchange&#

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第4题
[单选题] You have a domain that was created and configured with WebLogic 10.3.5. You want to upgrade  the domain to use WebLogic 12c. Which Oracle tool must you use to upgrade your domain?（）

A、Oracle WebLogic Domain Upgrade tool  B、Smart Update   C、Smart Upgrade    D、No tool required, just install WebLogic 12c, update the domain to point to the new WebLogic installation and start your domain.  E、JDeveloper  

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第5题
[单选题] You have just added a CD.ROM drive （/dev/hdd） to your system and have added it to yourfstab. Typically you can use which of the following commands to mount media in that drive to /mnt/cdrom？（）

A、 mount /dev/cdrom /mnt/cdrom  B、 mount/dev/cdrom  C、 mount -t cdrom /dev/cdrom /mnt/cdrom  D、 mount /mnt/cdrom  E、 automount /mnt/hdd /mnt/cdrom  

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第6题
[单选题] You are the administrator of your company’s network. You run the English （US） edition of Windows 2000 Professional on all computers in your network. As your company continues to grow， and the number of computers is continually expanding， you decide that another domain is needed. Management asks you about what is required to accommodate this new domain. What should you answer the Management in this regard？ （）

A、WINS， DHCP and DNS  B、At least one domain controller and one DNS server.  C、At least one domain controller， Active Directory and DNS server.  D、Nothing more is needed.  E、Nothing more is needed， we can just subnet the network.  

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第7题
[判断题] The operations of a telegraphic transfer is just the same as the mail transfer.

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第8题
[] 10. public Object m（） { 11. Object o = new Float（3.14F）； 12. Object [] oa = new Object[1]； 13. oa[0] = o； 14. o = null； 15. return oa[0]； 16. } When is the Float object， created in line 11， eligible for garbage collection？（）  

A、A. Just after line 13.  B、B. Just after line 14.  C、C. Never in this method.  D、D. Just after line 15 （that is， as the method returns）.  

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第9题
[] After restarting your Windows 2000 Professional Computer, your Monitor shows a blank blue screen without text and your Computer will does respond to keyboard or mouse commands. You discover that an incorrect driver was just installed. How should you correct the problem? （）

A、A.Use the "Last Known Good Configuration" to restart you system and correct the problem.  B、B.There is nothing you can do. Reinstall the Operating System.  C、C.Call the manufacturer to request a Windows 2000 compatible driver.  D、D.Use the Emergency-Repair-Disk.  

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第10题
[单选题] You have read/write permission on an ordinary file foo. You have just run In foo bar. What would happen if you ran rm foo？（）

A、 foo and bar would both be removed.  B、 foo would be removed while bar would remain accessible.  C、 foo would be removed， bar would still exist but would be unusable.  D、 Both foo and bar would remain accessible.  E、 You would be asked whether bar should be removed.  

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