单选题Note the following functionalities of various background processes： 1：Record the checkpoint information in data file headers. CKPT 2：Perform recovery at instance startup. SMON 3：Cleanup unused temporary segments. SMON 4：Free the resources used by a

题目

单选题

Note the following functionalities of various background processes： 1：Record the checkpoint information in data file headers. CKPT 2：Perform recovery at instance startup. SMON 3：Cleanup unused temporary segments. SMON 4：Free the resources used by a user process when it fails. 5：Dynamically register database services with listeners. 6：Monitor sessions for idle session timeout. Which option has the correct functionalities listed for a background process（）

A

Archiver Process （ARCn）：1， 2，5

B

System Monitor Process （SMON）：1，4，5

C

Process Monitor Process （PMON）：4，5，6

D

Database Writer Process （DBWn）：1，3，4

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相似问题和答案

第1题：

The term foreign exchange is best defined by the following statement: it is ______.

A．the rate of exchange between two currencies

B．synonymous with currency exchange

C．the place in which foreign currencies are exchanged

D．an instrument such as paper currency, note, and check used to make payments between countries

正确答案：D
解析：外汇通常指以外国货币表示的可用于国际结算的各种支付手段，包括纸币、支票、票据等。the rate of exchange between two currencies两国货币的汇率。synonymous with currency exchange与货币兑换率含义相同。

第2题：

Which of the following is the major advantage of PCI－e over PCI－X?()

A. Sensitivity to background noise

B. Height of the card

C. Shared bus topology

D. Point-to-point bus topology

参考答案：D

第3题：

If the maker of a promissory note fails to pay the note on the due date, the note is said to be( )

A、displaced

B、disallowed

C、dishonored

D、dishonored

正确答案:C

第4题：

Which of the following Windows versions includes Windows Defender, by default?（）

A、Windows Vista Home Premium
B、Windows 2000 Professional
C、Windows XP Pro
D、Windows XP Pro x64
E、Windows Vista Pro

正确答案:A,E

第5题：

In determining a safe speed, the Rules list all of the following as factors which must be taken into account EXPECT the ______.

A.limitations of radar equipment

B.presence of background lights at night

C.maximum horsepower of your vessel

D.maneuverability of your vessel

正确答案：C
在确定安全航速时，规则下列给出的除最大功率外应该考虑下列所有因数。

第6题：

在