Which statement regarding the contents of the V$PARAMETER view is true？（） displays only the list of default values。 displays only the list of all basic parameters。 displays the currently in effect parameter values。 displays only the list of all advanced parameters。 displays the list of all the parameter files of a database。
蓄电池在通信设备中一般采用（）工作制。 均充。 浮充。 不充。
What is true about a background engine? （）(Choose two.) It is a server-side PL/SQL procedure.。 When executing a PL/SQL function activity, it will automatically ping (cache) the PL/SQL code.。 It executes deferred activities in decreasing order of their Cost property value (activities with higher cost value are processed first).。 It would fail if another background engine process is started to handle the same type of activities within the same item type.。 During its single invocation, it processes activities that were stuck, deferred or timed out when the background engine was started.。
下列选项中，通过会计来核算的有（）。 物资消耗定额记录。 营业收入。 负债。 所有者权益。 定额计算登记。
You would like to display the system date in the format "Monday, 01 June, 2001".Which SELECT statement should you use?（） SELECT TO_DATE(SYSDATE, 'FMDAY, DD Month, YYYY') FROM dual;。 SELECT TO_CHAR(SYSDATE, 'FMDD, DY Month, 'YYY') FROM dual;。 SELECT TO_CHAR(SYSDATE, 'FMDay, DD Month, YYYY') FROM dual;。 SELECT TO_CHAR(SYSDATE, 'FMDY, DDD Month, YYYY') FROM dual;。 SELECT TO_DATE(SYSDATE, 'FMDY, DDD Month, YYYY') FROM dual。
Click the Exhibit button
Which two statements are true if a NullPointerException is thrown on line 3 of class C？（）
