Oracle认证考试

Which two are true about aggregate functions? （）A、You can use aggregate functions in any clause of a SELECT statement.B、You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.C、You can mi

题目

Which two are true about aggregate functions? （）

  • A、You can use aggregate functions in any clause of a SELECT statement.
  • B、You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.
  • C、You can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.
  • D、You can pass column names, expressions, constants, or functions as parameter to an aggregate function.
  • E、You can use aggregate functions on a table, only by grouping the whole table as one single group.
  • F、You cannot group the rows of a table by more than one column while using aggregate functions.
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相似问题和答案

第1题：

Which two statements are true about pool－based source NAT? ()(Choose two.)

A. PAT is not supported.

B. PAT is enabled by default.

C. It supports the address-persistent configuration option.

D. It supports the junos-global configuration option.


参考答案：B, C

第2题：

Which two statements are true about precedence values in policy?() (Choose two.)

A. 1 is the default precedence.

B. A lower number is preferred.

C. A higher number is preferred.

D. 100 is the default precedence.


参考答案：B, D

第3题：

Which of the following about the African bush elephant and the African elephant is true?

A．The WCU are interbreeding those elephants.

B．They are interbreeding species.

C．They are two genetically distant species.

D．They depend on each other for survival.


正确答案：C
解析：答案在第六段中。该段举了非洲大象为例，说明什么是cryptic species。第六段的句子“A 2001 study found the elephants were actually two genetically distinct，non-inter-breeding species”是选择C的依据。选项A不对，the WCU并没有杂交繁殖这两种象。选项B不对，短文说这两类象是非杂交物种。选项D的内容短文中找不到。

第4题：

Which two statements are true about L2TP tunnels?（） (Choose two.)

  • A、Traffic is clear text
  • B、Traffic is encrypted 
  • C、They are initiated by the LNS
  • D、They are initiated by the LAC

正确答案:A,D

第5题：

Which statement about Belgium is NOT true?

A.it is twice as big as Beijing.
B.it has two major ethnic groups.
C.it has gone through quite a few threats of division.
D.it has no government.

答案：D
解析：

第6题：

Which two statements are true about AH?() (Choose two.)

A. AH provides data integrity.

B. AH is identified by IP protocol 50.

C. AH is identified by IP protocol 51.

D. AH cannot work in conjunction with ESP


参考答案：A, C

第7题：

Which statement about two lines spliced together is TRUE ________．

A.Splicing is used to increase the circumference of each line

B.Splicing two lines together is stronger than knotting two lines together

C.Splicing is used to increase the overall strength of the line

D.Splicing is used to prevent rotting of the lines bitter end


正确答案：B

第8题：

Which of the following is NOT true about the centrifugal separator?

A.It can be applied to separate two liquids

B.It cannot separate solids which contaminated in the oil.

C.It consists of purifier and clarifier

D.The centrifuge arranged to separate two liquids is known as purifier


答案：B

第9题：

Which two statements about VACLs on Cisco Nexus 7000 Series Switches are true？ （）

  • A、 A single VACL can be shared across two or more VDCs.
  • B、 Use of VACLs requires no special license to be installed.
  • C、 VACLs make use of IP or MAC ACLs.
  • D、 Only options drop and forward are permitted.

正确答案:B,C

第10题：

Which two statements are true about traffic shaping？（）

  • A、Out-of-profile packets are queued.
  • B、It causes TCP retransmits.
  • C、Marking/remarking is not supported.
  • D、It does not respond to BECN and ForeSight Messages.
  • E、It uses a single/two-bucket mechanism for metering.

正确答案:A,C

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