[单项选择]You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.Which IP address range meets these requirements?（）
A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25

[单项选择]You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.Which IP address range meets these requirements?（）
A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25

[多项选择] You are working on a database that must be functioning 24 hours a day， 7 days a week. The databaseis configured in ARCHIVELOG mode.  Which two options do you have for performing user-managed backups（）
A. You can perform consistent backups only.
B. You can perform a complete database backup without shutting down the database instance.
C. You can back up data files only when all data files have the same SCN recorded in the control file.
D. You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.

[单项选择] You are working as a Database Administrator. Despite having a password in the data dictionary as change_on_install， you always log on to the database MYNEWDB using operating system authentication. Your organization is planning to recruit two junior-level DBAs. You decide to enable remote authentication in your database so that the new DBAs can log on to the database from their workstations to carry out administrative tasks.   To allow the new DBAs to perform the administrative tasks， you create a password file on the database server using the following command：   ORAPWD file=d：/oracle/ora9i/orapwU01 password=admin entries=4   After creating the password file， you remove the operating system authentication and change the value of the  REMOTE_LOGIN_PASSWORDFILE parameter to EXCLUSIVE. You also create a net service name as MYNEWDB that allows the new DBAs to connect to the database server from their workstations using this net service name. Which command must you use to connect to the database to start it？（）  
A.  CONNECT / AS SYSDBA
B.  CONNECT sys/admin AS SYSDBA
C.  CONNECT sys/admin@mynewdb AS SYSDBA
D.  CONNECT sys/change_on_install AS SYSDBA

[单项选择]You are working in a data center environment and are assigned the address range 10.188.31.0/23.You are asked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hosts each.Which IP address range meets these requirements？（）
A. 10.188.31.0/27
B. 10.188.31.0/26
C. 10.188.31.0/29
D. 10.188.31.0/28
E. 10.188.31.0/25

[简答题] You are working at ABC Company. You are the supervisor of Information Processing Center. You need some information about the walnutmeat in stock because one of your customers need it eagerly. Write a memorandum to the Inventory Supervisor. 你在ABC公司工作，是信息处理中心主管。你的一位客户急需你公司生产的核桃仁。写一份备忘录给存货部主管向其询问库存情况。

[单项选择]Your refrigerator is not working and you have found that the electric power had been cut off. The power failure is a _____.
A. necessary cause
B. sufficient cause
C. contributory cause
D. none of the above

[单项选择] ROW-based replication has stopped working. You investigate the error log file and find the following entries: 2013-08-27 14:15:47 9056 [ERROR] Slave SQL: Could not execute Delete_rows event on table test.t1; Can't find record in 't1', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event's master log 56_master-bin. 000003, end_log_pos 851, Error_code: 1032 2013-08-27 14:15:47 9056 [warning] Slave: Can't find record in 't1' Error_code: 1032 2013-08-27 14:15:47 9056 [ERROR] Error running query, slave SQL thread aborted. Fix the problem, and restart the slave SQL thread with "SLAVE START". We stopped at log '56_masterbin. 000003' position 684 Why did you receive this error?（）
A. The slave SQL thread does not have DELETE privileges to execute on test.t1 table.s
B. The table definition on the slave -litters from the master
C. Multi-threaded replication slaves can have temporary errors occurring for cross database updates
D. The slave SQL thread attempted to remove a row from the test.t1 table, but the row did not exist

[单项选择]Which statement about data center access layer design modes is correct?（）
A. The access layer is the first oversubscription point in a data center design.
B. When using a Layer 2 loop-free design, VLANs are extended into the aggregation layer.
C. When using a Layer 2 looped design, VLANs are not extended into the aggregation layer.
D. When using a Layer 3 design,stateful services requiring Layer 2 connectivity are provisioned from the aggregation layer.
E. The data center access layer provides the physical-level connections to the server resources and only operates at Layer 3.

[单项选择]You are working on an existing Web site. You need to secure the Web site by redirecting all users to the logon page, Login.aspx. After logging on, users must be sent back to the page that they originally requested. Which code segment should you use? （）
A. In the Web.config file: On each page in the Web site: void Page_Load(Object sender, EventArgs E){ FormsAuthentication.Initialize(); //Rest of the Page_Load code goes here}
B. On each page in the Web site: void Page_Load(Object sender, EventArgs E){ FormsAuthentication.RedirectToLoginPage(“login.aspx”); //Rest of the Page_Load code goes here}
C. On each page in the Web site: void Page_Load(Object sender, EventArgs E){ Response.Redirect(“login.aspx”);//Rest of the Page_Load code goes here}
D. In the Web.config file:

[单项选择]The center is an organization working mainly ______.
A. in the policy making processes
B. for the profits of UNICEF
C. for the benefits of children
D. in emergency situations

[单项选择]Certkiller .com has a remote data center with servers connected to a local datacenter through a high-speed network. Which of the following methods is the most convenient to use to install and upgrade the servers in the remote center using locally managed install images?（）
A. NIM
B. HAGEO/HACMP
C. NFS
D. ftp, rsh and rexec

[多项选择] You are building a test environment to evaluate DNS Security Extensions (DNSSEC). You have a domain controller named Server1 that runs Windows Server 2008 R2 in your test environment. Server1 has the DNS Server server role installed. You need to configure Server1 to support the DNSSEC evaluation. Which two actions should you perform？（）
A. Create a new Quad-A (AAAA) DNS record.
B. Create a new Signature (SIG) DNS record.
C. Create a new Public key (KEY) DNS record.
D. Create a new Well-known service (WKS) DNS record.

[单项选择] You are working on a 24X7 database. You want to design a backup strategy for your database that uses user managed backups. You want to be able to perform all backups while the database remains online. Which statement about performing user-managed backups in a 24x7 environment is true?（）
A. You must have change tracking enabled in your database
B. Your database must be running in NOARCHIVELOG mode
C. To back up a tablespace, it must be in backup mode
D. To back up a tablespace, it must first be taken offline

[单项选择]Your radar displays your ship off center．As you proceed on your course， your ship’s marker moves on the PPI scope while echoes from land masses remain stationary.What is this display called（）.
A. Off center
B. True motion
C. Stabilized
D. Head up

[单项选择] You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command. Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command?（）
A. Restore the backup control file and open the database with RESETLOGS option.
B. Perform point-in-time recovery because flashback cannot be performed again on this table
C. Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
D. Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571