Youruorganizationuroutinelyuusesuscripts,ubutuasusomeuemployeesuhaveuleft,uthereuareuscriptsuthatucontai
nuonlyucommandulinesuandunouoneuisucertainuofutheirupurpose.Whatustepsucanubeutakenutouensureuauwayuf
oruothersutouknowutheupurposeuofuauscript?uuuuAns✔✔-
uRequireuthatuscriptuwritersuplaceucommentulinesuinsideutheuscriptsuusingutheu#usymbolutoubeginueachuco
mmentuline.
Whichuofutheufollowingushellsuenablesutheuuseuofuscripts?u(Chooseualluthatuapply.)uuuuAns✔✔-uBash
csh
zsh
Youufrequentlyuuseutheucommandulsu-
auanduwantutousaveutimeubyujustuenteringulutoudoutheusameuthing.Whichuofutheufollowingucommandsuena
blesuyouutousetuyourusystemutouviewuhiddenufilesubyuonlyuenteringulu?uuuuAns✔✔-ualiasul="ulsu-a"
Youuhaveuwrittenuauscript,ubutuwhenuyouurunuituthereuisuanuerror.uWhichuofutheufollowingucommandsucanu
youuuseutoudebuguyouruscript?u(Chooseualluthatuapply.)uuuuAns✔✔-ushu-v
shu-x
Youuhaveuwrittenuaushelluprogramuthatucreatesufourutemporaryufiles.Whichuofutheufollowingucommandsuc
anuyouuuseutouremoveutheseufilesuwhenutheuscriptuhasucompleteduitsuwork?uuuuAns✔✔-utrap
Whichuofutheufollowingucommandsuworksuwelluforumenusuuseduinuauscript?u(Chooseualluthatuapply.)uuuuAns
✔✔-ucase
Youuareucurrentlyuinutheusourceudirectory,uwhichuisutheunewudirectoryuyouuhaveujustucreateduforustoringua
ndurunninguyouruscripts.Youuwantutoumakeucertainuthatutheusourceudirectoryuisuinuyourudefaultupath.Whic
,huofutheufollowingucommandsuenablesuyouutouviewutheucurrentudefaultupathusettings?uuuuAns✔✔-
uechou$PATH
Youuhaveucreateduauscriptuforuuseubyuyouruentireudepartmentuinuaucommonlyuaccessedudirectory.uOnlyuy
ouuareuableutourunutheuscript,uwhichuworksuperfectly.Whichuofutheufollowinguisulikelyutoubeutheuproblem?uu
uuAns✔✔-uYouudidunotugiveualluusersuinuyourudepartmentuexecuteupermissionuforuthatuscript.
Yourucurrentuworkingudirectoryucontainsuauseriesuofufilesuthatustartuwithutheuwordu"account"ucombineduw
ithua,ub,uc,ud,uandue,usuchuasuaccounta,uaccountb,uandusouon.uWhichuofutheufollowingucommandsuenablesu
youutouviewutheucontentsuofualluofutheseufiles?u(Chooseualluthatuapply.)uuuuAns✔✔-
umoreuaccount[ua,b,c,d,eu]
Foruwhichuofutheufollowingulogicustructuresuuseduwithinuauscriptuisufiutheufinalulineuforuthatulogicustructure
?u(Chooseualluthatuapply.)uuuuAns✔✔-uif
Whichuofutheufollowinguareuexamplesuofuarithmeticuorurelationaluoperators?u(Chooseualluthatuapply).uuuuAn
s✔✔-u!
<
%
*
Youuhaveucreateduauseriesuofuscriptsuthatuuseutheusameuenvironmentuvariables.uHowever,uwhenuyouurunut
heseuscripts,usomeuofuthemudounotuseemutourecognizeutheuenvironmentuvariablesuyouuhaveuset.uWhatuisu
theuproblem?uuuuAns✔✔-uYouuneedutouuseutheuexportucommandusoutheseuvariablesuhaveuglobaluuse.
Youuhaveuspentutheulastutwouhoursucreatinguaureportuinuaufileuanduafterwardsuyouuuseucatutoucreateuaunew
ufile.uUnfortunatelyutheunewufileunameuyouuuseduwasutheusameuasutheunameuyouuuseduforutheureport,uand
unowuyourureportuisugone.Whatushoulduyouudounextutimeutoupreventuthisufromuhappening?uuuuAns✔✔-
uEnterutheucommand,usetu-ounoclobberubeforeuyouustart.
YouuhaveuremotelyuloggeduintouaucomputerurunninguUNIXuoruLinux,ubutuyouuareunotucertainuaboutuwhich
uoperatingusystemuyouuareuusing.uHowever,uwhenuyouudisplayutheucontentsuofutheuvariableuitushowsuwhic
huoperatingusystemuyouuareuusing.uuuuAns✔✔-uOSTYPE
, Whatucommanducanuyouuuseutouviewutheuenvironmentuanduconfigurationuvariablesualreadyuconfigureduo
nuyourusystem?uuuuAns✔✔-uprintenv
Whichuofutheufollowinguareuvaliduexpressions?u(Chooseualluthatuapply.)uuuuAns✔✔-uletux=5*9
letux=y+10
letum=12/4
letur=128-80
WhenuyouutypeuforuwoodumapleuspruceuoakupineuatutheucommandulineuanduthenupressuEnter,uwhatushoul
duyouutypeunextuatutheu>uprompt?uuuuAns✔✔-udo
Youuwantutoustoreuaulongulistinguofuyourufilesuinuauvariableucalledumyfiles.Whichuofutheufollowingucomma
ndsuenablesuyouutoudouthis?uuuuAns✔✔-umyfiles='lsu-l'
Whatuerroruisuinutheufollowinguscriptucode?
caseu"selection"uin
"uiu")u./listscriptu;;
"uiiu")u./numberscriptu;;
"uiiiu")u./findscriptu;;
esacuuuuAns✔✔-uThereushouldubeuaudollarusignuinufrontuofuselection,uasuinu"$selection"
Youuareuworkinguwithuaucolleagueuonuauscriptucalleduvalueuthatuupdatesuseveralufiles.Youuwantutoutestuthe
uscript,ubutunotuupdateutheufiles.uWhichuofutheufollowingucommandsucanuyouuuse?uuuuAns✔✔-ushu-nuvalue
nuonlyucommandulinesuandunouoneuisucertainuofutheirupurpose.Whatustepsucanubeutakenutouensureuauwayuf
oruothersutouknowutheupurposeuofuauscript?uuuuAns✔✔-
uRequireuthatuscriptuwritersuplaceucommentulinesuinsideutheuscriptsuusingutheu#usymbolutoubeginueachuco
mmentuline.
Whichuofutheufollowingushellsuenablesutheuuseuofuscripts?u(Chooseualluthatuapply.)uuuuAns✔✔-uBash
csh
zsh
Youufrequentlyuuseutheucommandulsu-
auanduwantutousaveutimeubyujustuenteringulutoudoutheusameuthing.Whichuofutheufollowingucommandsuena
blesuyouutousetuyourusystemutouviewuhiddenufilesubyuonlyuenteringulu?uuuuAns✔✔-ualiasul="ulsu-a"
Youuhaveuwrittenuauscript,ubutuwhenuyouurunuituthereuisuanuerror.uWhichuofutheufollowingucommandsucanu
youuuseutoudebuguyouruscript?u(Chooseualluthatuapply.)uuuuAns✔✔-ushu-v
shu-x
Youuhaveuwrittenuaushelluprogramuthatucreatesufourutemporaryufiles.Whichuofutheufollowingucommandsuc
anuyouuuseutouremoveutheseufilesuwhenutheuscriptuhasucompleteduitsuwork?uuuuAns✔✔-utrap
Whichuofutheufollowingucommandsuworksuwelluforumenusuuseduinuauscript?u(Chooseualluthatuapply.)uuuuAns
✔✔-ucase
Youuareucurrentlyuinutheusourceudirectory,uwhichuisutheunewudirectoryuyouuhaveujustucreateduforustoringua
ndurunninguyouruscripts.Youuwantutoumakeucertainuthatutheusourceudirectoryuisuinuyourudefaultupath.Whic
,huofutheufollowingucommandsuenablesuyouutouviewutheucurrentudefaultupathusettings?uuuuAns✔✔-
uechou$PATH
Youuhaveucreateduauscriptuforuuseubyuyouruentireudepartmentuinuaucommonlyuaccessedudirectory.uOnlyuy
ouuareuableutourunutheuscript,uwhichuworksuperfectly.Whichuofutheufollowinguisulikelyutoubeutheuproblem?uu
uuAns✔✔-uYouudidunotugiveualluusersuinuyourudepartmentuexecuteupermissionuforuthatuscript.
Yourucurrentuworkingudirectoryucontainsuauseriesuofufilesuthatustartuwithutheuwordu"account"ucombineduw
ithua,ub,uc,ud,uandue,usuchuasuaccounta,uaccountb,uandusouon.uWhichuofutheufollowingucommandsuenablesu
youutouviewutheucontentsuofualluofutheseufiles?u(Chooseualluthatuapply.)uuuuAns✔✔-
umoreuaccount[ua,b,c,d,eu]
Foruwhichuofutheufollowingulogicustructuresuuseduwithinuauscriptuisufiutheufinalulineuforuthatulogicustructure
?u(Chooseualluthatuapply.)uuuuAns✔✔-uif
Whichuofutheufollowinguareuexamplesuofuarithmeticuorurelationaluoperators?u(Chooseualluthatuapply).uuuuAn
s✔✔-u!
<
%
*
Youuhaveucreateduauseriesuofuscriptsuthatuuseutheusameuenvironmentuvariables.uHowever,uwhenuyouurunut
heseuscripts,usomeuofuthemudounotuseemutourecognizeutheuenvironmentuvariablesuyouuhaveuset.uWhatuisu
theuproblem?uuuuAns✔✔-uYouuneedutouuseutheuexportucommandusoutheseuvariablesuhaveuglobaluuse.
Youuhaveuspentutheulastutwouhoursucreatinguaureportuinuaufileuanduafterwardsuyouuuseucatutoucreateuaunew
ufile.uUnfortunatelyutheunewufileunameuyouuuseduwasutheusameuasutheunameuyouuuseduforutheureport,uand
unowuyourureportuisugone.Whatushoulduyouudounextutimeutoupreventuthisufromuhappening?uuuuAns✔✔-
uEnterutheucommand,usetu-ounoclobberubeforeuyouustart.
YouuhaveuremotelyuloggeduintouaucomputerurunninguUNIXuoruLinux,ubutuyouuareunotucertainuaboutuwhich
uoperatingusystemuyouuareuusing.uHowever,uwhenuyouudisplayutheucontentsuofutheuvariableuitushowsuwhic
huoperatingusystemuyouuareuusing.uuuuAns✔✔-uOSTYPE
, Whatucommanducanuyouuuseutouviewutheuenvironmentuanduconfigurationuvariablesualreadyuconfigureduo
nuyourusystem?uuuuAns✔✔-uprintenv
Whichuofutheufollowinguareuvaliduexpressions?u(Chooseualluthatuapply.)uuuuAns✔✔-uletux=5*9
letux=y+10
letum=12/4
letur=128-80
WhenuyouutypeuforuwoodumapleuspruceuoakupineuatutheucommandulineuanduthenupressuEnter,uwhatushoul
duyouutypeunextuatutheu>uprompt?uuuuAns✔✔-udo
Youuwantutoustoreuaulongulistinguofuyourufilesuinuauvariableucalledumyfiles.Whichuofutheufollowingucomma
ndsuenablesuyouutoudouthis?uuuuAns✔✔-umyfiles='lsu-l'
Whatuerroruisuinutheufollowinguscriptucode?
caseu"selection"uin
"uiu")u./listscriptu;;
"uiiu")u./numberscriptu;;
"uiiiu")u./findscriptu;;
esacuuuuAns✔✔-uThereushouldubeuaudollarusignuinufrontuofuselection,uasuinu"$selection"
Youuareuworkinguwithuaucolleagueuonuauscriptucalleduvalueuthatuupdatesuseveralufiles.Youuwantutoutestuthe
uscript,ubutunotuupdateutheufiles.uWhichuofutheufollowingucommandsucanuyouuuse?uuuuAns✔✔-ushu-nuvalue
