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CSE 2221 Final Exam Questions With 100% Correct Answers 2024
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CSE 2221 Final Exam Questions With 100% Correct Answers
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CSE 2221 Final Exam Questions With100% Correct Answers
WhyiisitheicontainericlassicallediStack?i-iCorrectiAnswer-
Itifollowsitheisameisortiofiorganizationiandimanipulationitypeithatiaista
ckiinitheiprogramiexecutioniwouldiperformiLIFOi(last-in-first-out)
LIFOi-iCorrectiAnswer-lastiinifirstiout
HowiisiaiStackidifferentithanitheiqueue?i-iCorrectiAnswer-
itiisilikeiai"dual"iAiqueueiisifirstiinifirstiout,iwhileistackiisilastiinifirstiout
WhatiareitheithreeimethodsiofiStackKernel?i-iCorrectiAnswer-push
pop
length
WhatiareitheithreeimethodsiofitheiStackiInterface?i-iCorrectiAnswer-top
replaceTop
flip
WhatimathematicalimodeliisiStackimodelediby?i-iCorrectiAnswer-
ModeledibyimathematicalistringiofiT
,HowimanyiconstructorsiforiStack?i-iCorrectiAnswer-
onlyi1,iwhichiisiempty,icreatesianiemptyistack
WhatidoesitheiStackimethodivoidipush(Tix)ido?i-iCorrectiAnswer-
addsixitoitheitopi(leftiend)iofithis
aliasesireferenceix
updatesithis
ensuresi
thisi=i<x>i*i#this
WhatidoesitheistackimethodiTipop()ido?i-iCorrectiAnswer-
Removesiandiretursnitheientryiatitheitopi(leftiendiofithis)
updatesithis
requiresithisi/=i<>
ensures
#thisi=i<pop>i*ithis
Whatidoesitheistackimethodiintilength()ido?i-iCorrectiAnswer-
Reportsitheilengthiofithis
ensures
lengthi=i|this|
, WhatidoesitheistackimethodiTitop()ido?i-iCorrectiAnswer-
Returnsitheientryiatitheitopi(leftiend)iofithis
Aliases:ireferenceireturnedibyitop
requires:
thisi/=i<>
ensures
<top>iisiprefixiofithis
WhatidoesitheistackimethodiTireplaceTop(Tix)ido?i-iCorrectiAnswer-
replacesitopiofithisiwithix,iandireturnsitheiolditop
aliasesireferenceix
updatesithis
requires
thisi/=i<>
ensures:
<replaceTop>iisiprefixiofi#thisiand
thisi=i<x>i*i#this[1,i|#this|)
Whatidoesitheistackimethodivoidiflip()ido?i-iCorrectiAnswer-
reversesi("flips")ithis
updatesithis
ensures
thisi=irev(#this)
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