Directions
•
Printyournameande-mailIDinthebelowboxrightnow.
•
Printyournameande-mailIDonthelastpagerightnow.
•
Enteryoursignatureinthebelowboxaftercompletingthetest.
Name:
E-mailID:
Onmyhonor,IpledgethatIhaveneithergivennorreceivedhelponthistest.
Signature:
Testrules
•
Printyourname,id,andpledgeasrequested.
•
Thispledgedexamisclosedtextbook.Theonlydeviceyoumayaccessduringthetestisyourown
laptop.
•
Youarenotallowedtoaccessclassexamplesoryourownpastassignmentsduringthetest;i.e.,theonly
Pythoncodeyoumayaccessorviewareonesthatyoudevelopforthistest.
•
TheonlywindowsthatcanbeopenonyourcomputerarePyCharmandasinglebrowserwithtabsonly
opentotheclasswebsite.
•
•
PyCharmcanbeusedonlyfordevelopingtheprogramstobesubmitted.Itcannotbeusedfortheshort
answerquestions.
Programsshoulddemonstrateproperprogrammingstyle;e.g.,headercomments,whitespace,identifier
naming,etc.
•
Whetheraprogramcompilesisimportant.
CS1112Fall2015Test1–Page 1 of 8
1. (10points)Supposethefollowingassignmentsareineffect.
r=range(2,6)
s=[31,41]
t=[41,59]
u=['AB','C','D','EF']
v=['AB','CD']
w=['CS',1112]
x='CS1112'
a. Whatisthefirstvalueinranger?
b. Whatisthelastvalueinranger?
c.
Canthesecondvalueinrangerbe
changed(yesorno)?
d. Canthesecondvalueinlistsbe
changed(yesorno)?
e. Whatisthevalueofs+t?
f.
Whatisthevalueof('B'inu)?
g. Whatisthevalueofuafter
delu[1:3]?
h. Whatisthevalueofvafter
v.reverse()?
i.
IswalegalPythonlist(yesorno)?
j.
Whatlistisproducedbyx.split()?
CS1112Fall2015Test1–Page 2 of 8
2. (10points)Supposesisavariablerepresentingthestring'ABCABCABCABC'
s A
B
C
A
B
C
A
B
C
0
1
2
3
4
5
6
7
8
9
a. Whatisthelengthofs?
b. Whatistheindexofthefirst
occurrenceof'C'?
c.
Whatstringisproducedbythe
slicings[3:6]?
d. Whatstringisproducedby
s.replace('C','')?
e. Whatisthevalueof
s.find('b')?
f.
Whatisthevalueof
s.rfind('C',7)?
g. Whatsliceofsisneededto
producethestring'CA'?
h. Howmanyelementsareinthe
listproducedbys.split()?
i.
Whatisthevalueofsafter
s.lower()?
j.
Whatisthevalueof
s.capitalize()?
CS1112Fall2015Test1–Page 3 of 8
A
B
C
10
11
12
3. (1points)Whattypeofvalueisprintedbythefollowingcodesegment?
importrandom
r=random.randrange(0,2)
print(r)
4. (3points)Whatarethepossiblevaluesprintedbythefollowingcodesegment?
importrandom
r=random.randrange(1,3)
print(r)
5. (3points)Isitpossibleforthefollowingcodesegmenttoprintthesamevaluetwice(yesorno)?
importrandom
r1=random.randrange(1,3)
r2=random.randrange(1,3)
print(r1,r2)
6. (3points)Isitpossibleforthefollowingcodesegmenttoprinttwodifferentvalues(yesorno)?
importrandom
random.seed(1112)
r1=random.randrange(1,3)
random.seed(1112)
r2=random.randrange(1,3)
print(r1,r2)
CS1112Fall2015Test1–Page 4 of 8
7. (1point)Whatisthevalueof1+1*4?
8. (1point)Whatisthedifferencebetween
thecalculationsx/yandx//y?
9. (1point)Supposeyisanumericvariable.
WriteaBooleanexpressionthatistrueif
thevalueofyisabirthyearforamember
of the millennial generation (i.e., y lies
inclusivelybetween1980and1996).
10. (1point)Writeastatementthatsetspto
thevalue
!"#$
!!"# !
.
11. (1point)Considerthebelowcodesegment.
Whatisthemin(x)?
x=['12','2','9','11']
y=[12,2,9,11]
Whatisthemin(y)?
12. (1point)Considerthebelowcodesegment.
Whatist’stype?
s='wahoo3'
t,u=s.split()
Whatisu’stype?
13. (1point)Supposerisastring
containingonlybase10digits.Givean
assignmentstatementthatconvertsr
tothecorrespondingnumericvalue.
14. (1point)Thecircumferencecofa
circleis2 π r.Writethecorresponding
Pythonstatement.
CS1112Fall2015Test1–Page 5 of 8
15. (20points)Developprogramone.py.Theprogramgetsanintegerinputvaluen.Theprogramprints
n
1112 .Thereshouldbenootheroutput.
Threesampleruns
Enteraninteger:3
1375036928
Enteraninteger:1
1112
Enteraninteger:4
1529041063936
16. (20points)Developprogramtwo.py.Theprogramgetsthenameofawebfileasinput.Thewebfileis
locatedintheCS1112webfolder
http://www.cs.virginia.edu/~cs1112/datasets/testing/
The web file will contain two numbers x and y. The program determines and prints the relationship
betweenxandy;thatisequal,ascending,ordescending.Thereshouldbenootheroutput.
Somesampledatafilesareavailable(wewillusedifferentfilesduringtesting).
• a.txtcontains31and41.
• b.txtcontains11and11.
• c.txtcontains20and15.
Threesampleruns
Enternameofwebfile:a.txt
ascending
Enternameofwebfile:b.txt
equal
Enternameofwebfile:c.txt
descending
CS1112Fall2015Test1–Page 6 of 8
17. (20points)Developprogramthree.py.Theprogramgetstwoinputs.Thefirstinputisastring.The
secondinputisalineofwords.Theprogramprintsthewordsonthelinethatcontainthestring.There
shouldbenootheroutput.
When matching, case does not matter. For example, 'abc' matches 'daBChick', and 'XY' matches
'epoxy'.
Threesampleruns
Enterword:stir
Enterlistofwords:Thesoupwasre-stirredwithSTirLINGstirrups
re-stirred
STirLING
stirrups
Enterword:abc
Enterlistofwords:TheEnglishalphabetgoesfromatoz
Enterword:DeF
Enterlistofwords:Thedefendant'sreasoningwasindefensible
defendant's
indefensible
CS1112Fall2015Test1–Page 7 of 8
Clearlyprintyournameande-mailid
Name
E-mailID:
Page2
_________________________________________________
10
Page3
_________________________________________________
10
Page4
_________________________________________________
10
Page5
_________________________________________________
10
one.py
_________________________________________________
20
two.py
_________________________________________________
20
three.py
_________________________________________________
20
Total
_________________________________________________
100
CS1112Fall2015Test1–Page 8 of 8