单选题Which statement is true regarding checkpoints and recovery？（）A A checkpoint defines the highest system change number （SCN）.B All redo entries higher or at the SCN are known to be written to the data files.C Only the redo records containing SCNs higher 

第1题：

Which statement is true regarding the forwarding plane?（）

• A、The forwarding plane is contained within the Routing Engine (RE)
• B、The forwarding plane processes and evaluates exception traffic
• C、The forwarding plane contains the Packet Forwarding Engine (PFE)
• D、The forwarding plane is not present on all platforms running the Junos OS

第2题：

Which statement is true regarding syslog on Junos devices?（）

• A、No logging is enabled by default
• B、By default the information is stored in all file named events
• C、Only the message severity level must be configured
• D、You can configure the router to send log messages to the console

第3题：

第4题：

Which of the following statement is incorrect regarding RMAN？（）

• A、It detects corrupt blocks.
• B、It performs only offline database backups.
• C、It omits empty blocks during backups.
• D、It performs tablespace point-in-time recovery （TSPITR）.

第5题：

You are maintaining the database in Oracle10g. You are performing an incomplete recovery by using RMAN because an important table， EMPLOYEE， is dropped and purged from the Recycle Bin. Which statement is NOT true regarding an incomplete recovery？（）

• A、 The target database must be in the MOUNT mode to ensure restoration of the datafiles.
• B、 You can restore the datafiles from the backup by using the RMAN utility only if the backups were taken using the RMAN utility.
• C、 The control file must be recreated.
• D、 The database must be opened with the RESETLOGS option.

第6题：

Which statement is true regarding the Archiver （ARCn） process，archived log files，and recovery？ （）

• A、A database backup, combined with archived redo log files, guarantees that all committed data can be recovered to the point of failure. 
• B、During recovery the ARCn background process copies its redo entries identified for recovery by the control file to the data files. 
• C、After each write to an archived log, the mandatory background process ARCn writes its log sequence number and the first and last SCN number within the log sequence to the control file. 
• D、At database recover time, and archived redo log is uniquely identified for recovery use by its redo thread number and destination ID number retrieved from the control file.

第7题：

Which statement is true regarding RMAN components？（）

• A、Each target database requires its own recover catalog. 
• B、RMAN scripts can be stored in the recovery catalog or the target control file. 
• C、A channel is a stream of data to a device type and corresponds to one server session. 
• D、The RMAN executable interprets sever session commands and establishes connections to the target database.

第8题：

Which statement is true regarding Backup tasks in Cisco UCS？（）

• A、 They are created automatically and stored on the FI
• B、 They are created manually and exported to a remote server
• C、 They are automatically scheduled to run every 24 hours
• D、 They are manually scheduled and stored on the FI

第9题：

Which two statements are true regarding the ORDER BY clause? （）

• A、It is executed first in the query execution 
• B、It must be the last clause in the SELECT statement 
• C、It cannot be used in a SELECT statement containing a HAVING clause
• D、You cannot specify a column name followed by an expression in this clause 
• E、You can specify a combination of numeric positions and column names in this clause

第10题：

Which statement is true regarding Flashback Version Query？ （）

• A、 It returns versions of rows only within a transaction.
• B、 It can be used in subqueries contained only in a SELECT statement.
• C、 It will return an error if the undo retention time is less than the lower bound time or SCN specified.
• D、 It retrieves all versions including the deleted as well as subsequently reinserted versions of the rows.