电路中，电流之所以能流动，是由于电源两端的电位差所造成的，我们把这个电位差称为。（） 电压。 电流。 电源。
先行策略
The server host1 has been set up as a backup system with the following /etc/exports：/backups -rw. How can a second server regularly use this disk space？（） /usr/sbin/mkfs -s 8G -o nbpi=2048，frag=512 /dev/lv00 -b -l host1。 /usr/sbin/crnfsmnt -d /backups -l /backups host1 -R -X -v -S -b bg。 /usr/sbin/mknfsmnt -f /backups -d /backups -h host1 -a -S -t rw -w bg -g。 /usr/sbin/crfs -v nfs -g vg1 -A yes -p rw -m /backups -a logname=/dev/lv00。
An administrator plans to apply a fix pack to the PowerHA software using a rolling migration. At what stage ofthe migration is a cluster verification supported？（） Individually before each node is upgraded。 Individually before and after each node is upgraded。 Individually after each node has been upgraded。 Collectively after all nodes have been upgraded。
Evaluate the SQL statement: TRUNCATE TABLE DEPT; Which three are true about the SQL statement? （） It releases the storage space used by the table.。 It does not release the storage space used by the table.。 You can roll back the deletion of rows after the statement executes.。 You can NOT roll back the deletion of rows after the statement executes.。 An attempt to use DESCRIBE on the DEPT table after the TRUNCATE statement executes will display an error.。 You must be the owner of the table or have DELETE ANY TABLE system privileges to truncate the DEPT table。
Which naming method uses the tnsnames.ora file to store the connect descriptor used by the client
whileconnecting to the database instance from a remote machine（）
