Giventhefollowingscript,whydoestheoutputcomeoutasanemptylineinsteadof"dog"()!／bin／ksh$VAR=dogecho"${VAR}"A.The$VARvariablewasnotexported.B.The$VARshouldhavebeensetasVAR.C.dogneedsdoublequotesarounditwhensetting$VAR.D.The{}shouldnotbearoundVARintheechocomm

题目
Giventhefollowingscript,whydoestheoutputcomeoutasanemptylineinsteadof"dog"()!／bin／ksh$VAR=dogecho"${VAR}"

A.The$VARvariablewasnotexported.

B.The$VARshouldhavebeensetasVAR.

C.dogneedsdoublequotesarounditwhensetting$VAR.

D.The{}shouldnotbearoundVARintheechocommand.

相似考题

1.在UNIX的树型目录结构中,常见用途的目录有:／bin、／dev、／home、／temp、／usr、／var等,其中用来存放大部分可执行的UNIX命令和共用程序的目录是:()A./binB./devC./homeD./usrE./tempF.var

2.InwhichdirectoryarethebasicLinuxcommandssuchasgzip,gunzipandzcatinstalled?()A./opt/freeware/binB./usr/bin/freewareC./var/freeware/binD./usr/sbin/freeware

3.Which command will change the user webserver’s shell toksh93?()A.chshell -ksh93 webserverB.chsh webserver /usr/bin/ksh93C.chuser -a shell=/usr/bin/ksh93 webserverD.setuid -a SHELL=/usr/bin/ksh93 -u webserver

4.Which directory does the Junos OS use to store syslog information by default?()A. /var/messagesB. /var/syslogC. /var/tmpD. /var/log

参考答案和解析
参考答案：B
更多“Giventhefollowingscript,whydoestheoutputcomeoutasanemptylineinsteadof"dog"()!／bin／ksh$VAR=dogecho"${VAR}" ”相关问题

  • 第1题：

    ASystempcustomerhasinstalledcomponentsfromtheLinuxToolBox.Bydefault,whichofthefollowingdirectorieswillcontaintheopensourcecommandssuchasgzip,gunzipandzcat()

    A./opt/freeware/bin

    B./usr/bin/freeware

    C./var/freeware/bin

    D./usr/sbin/freeware


    参考答案：A

  • 第2题：

    Whatisthemostlikelyproblemwiththisscript()VAR=1((VAR=$VAR＋1))while[$VAR－It10]doecho$VARdone

    A.#!/bin/kshlineismissing

    B.VariablenameVARisnotproperlyinitialized

    C.Loopvariableisnotincrementedinsidetheloop

    D.Replacebracketswithbraces


    参考答案：C

  • 第3题：

    An operator needs to change from the ／usr／bin to the ／var／spool directory. Which of the following commands will accomplish this?()

    A. cd /var/spool

    B. lcd /var/spool

    C. cd /usr/bin /var/spool

    D. lcd /usr/bin /var/spool


    参考答案：A

  • 第4题：

    ASystempadministratorsuspectstheyarereceivinganerrorfromoneoftheirnightlycronjobs.Thejobis:01***／usr／local／bin／nightlycheck.plWhereshouldtheadministratorfirstlookforerrorsreportedbythiscronjob()

    A./var/log/syslog.out

    B.var/log/cron.log

    C./var/spool/cron/logs

    D.mail


    参考答案：D

  • 第5题：

    Giventhefollowingscripts，whatoutputwouldbegenerated（）usr/local/bin/scriptl!/usr/bin/kshVARl=redexportVARl=greenVARl=blue/usr/local/bin/script2ARl=yellow/usr/local/bin/script2!/bin/kshecho"Theskyis${VAR1}."

    A.Theskyisred.

    B.Theskyisblue.

    C.Theskyisgreen.

    D.Theskyisyellow.


    参考答案：C

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