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lisa is writing a formula to determine the number of element

题目
单选题
lisa is writing a formula to determine the number of elements in a list. she wants to ensure that a value is returned, even if the value her function is evaluating turns out to be a null string . which one of the following can she so to accomplish this ?（）
A

use a defaule formula of 1 

B

use @elements and add 1 to the total 

C

use the @count function instead of @elements 

D

use @texttotime to ensure that all strings arte converted to date-time values 

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

How do you determine the weight of the vessel that is supported by the ground when a vessel has run aground? ______.

A.This requires extensive calculation and is usually performed only by a naval architect not by a ship's officer

B.Determine the point where aground and the draft at that point，then calculate it using the grounding formula

C.Use the hydrostatic tables and enter with the mean draft before grounding and the mean draft after grounding

D.Use the inclining experiment formula and substitute the change of trim for the angle of list


正确答案：C

第2题：

Which two factors determine the recommended maximum number of virtual interfaces on a Cisco UCSsystem?（）

  • A、the number of computer blades in the system
  • B、the number of interfaces sharing the uplinks
  • C、the driver version on the OS running on the computer blade
  • D、the number of uplinks between I/O Module and Fabric Interconnect

正确答案:B,D

第3题：

A technician would use a physical network diagram to determine:()

A. the cause of routing errors.

B. the number of switches on the network.

C. the number of users on the network.

D. where network latency will occur.


参考答案：B

第4题：

When debugging a routing problem, the time-to-live (TTL) value can be used to determine:（）

  • A、Number of routes available.
  • B、Number of router hops.
  • C、Time that an advertised route is valid.
  • D、Time to make a round trip.

正确答案:B

第5题：

Why does IS-IS use the SPF algorithm?（）

  • A、to determine the pseudonode ID
  • B、to determine the next hop to a given destination
  • C、to determine the complete path to a given destination
  • D、to determine the number of routers present in a given area

正确答案:B

第6题：

______ATA-100, each page is identified by a three element number and a page number.

A.According with

B.In accordance with

C.To

D.In according to

答案：B
解析：
本题考察according/accordance的用法，常见用法是according to和in accordance with，两者都有“根据、依据”的意思，区别在于according to比较随意, in accordance with则多用于比较正式的问题,比如法律文件。题目意为“根据ATA-100,每一页由一个三元数和一个页码数来界定。”
　　

第7题：

What is the first step that you would use Cisco Product Advisor for when selecting a router for an Edge solution？（）

  • A、 determine types of protocols to be supported
  • B、 determine the environment in which the router will be used
  • C、 select the number of WAN ports required
  • D、 select the number of LAN ports required

正确答案:B

第8题：

What is the first step that you would use Cisco Product Advisor for when selecting a router for an Edge solution?()

A. determine types of protocols to be supported

B. determine the environment in which the router will be used

C. select the number of WAN ports required

D. select the number of LAN ports required


参考答案：B

第9题：

下列的那些命令可以用来检测用户lisa的信息？（）

  • A、finger lisa
  • B、grep lisa/etc/passwd
  • C、find lisa/etc/passwd
  • D、who lisa

正确答案:A,B

第10题：

A technician would use a physical network diagram to determine:（）

  • A、the cause of routing errors.
  • B、the number of switches on the network.
  • C、the number of users on the network.
  • D、where network latency will occur.

正确答案:B

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