When scaling Coherence from one to two cache servers， it will not show the same scalability as two to four. Why？（） Coherence uses a more efficient TCMP algorithm going from two to four cache servers。 When going from one to two cache servers， object backups are copied across servers so work is doubled，but going from two to four is a fixed amount of work。 Near cache is enabled with a larger quorum thus performance is improved。 all of the above。
脱乙烷塔是（）塔进料状态为（） 填料塔。 浮阀板式。 汇体进料。 分汇混和进料。 气体进料。
You execute the following command in your Certkiller .com production database to change the width of the CUST_NAME column of the CUSTOMERS table： ALTER TABLE customers MODIFY （cust_nameVARCHAR2 （40）） / When you execute the command， it displays the following error message： ERROR at line 1： ORA-00054： resource busy and acquire with NOWAIT specified What could be the reason for the error message？（） The database instance is not available.。 The ALTER TABLE command does not have WAIT option。 The table or a row in the table is currently locked by another user session.。 The database instance is busy processing other user sessions commands.。 The CUSTOMERS table has no long running query active at the time when this request is made.。 The server process executing the ALTER TABLE command is busy with another command executio。
封堵作业时，管径相同、压力相同的气管线与油管线相比，所需皮碗直径要（） 大一些。 小一些。 相同。 小1/2&Prime。
A user executes a query on the EMPtable， which contains thousands of rows， to get details about employees in one of the departments. The user receives the following error： SQL> SELECT ename FROM emp WHERE deptno=10 ORDER BY sal； SELECT ename FROM emp WHERE deptno=10 ORDER BY sal ERROR at line 1： ORA-01157： cannot identify/lock data file 201 - see DBWR trace file ORA-01110： data file 201：’/u01/app/oracle/oradata/orcl/temp01.dbf’ What is a possible reason？（） The tempfile belonging to the default temporary tablespace is missing.。 The database is opened in restricted mode， so queries are not allowed。 The default temporary tablespace required to execute the query is offline.。 The default temporary tablespace required to execute the query is dropped.。 The default temporary tablespace required to execute the query is read-only.。
What is the result？（）
