chapter 3 selections.docx

8/9/2019 Chapter 3 Selections.docx

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Chapter 3 Selections

Section 3.2 boolean Data Type

3.1 The "less than or equal to" comparison operator in Java is __________.A. <

B.


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C. same as value

D. same as value (

Sections 3.3-3.10

3.6 hich o& the &ollo+in' co,e ,isplas the area o& a circle i& the ra,ius is positive.A. i& /ra,ius != (0 1stem.out.println/ra,ius 2 ra,ius 2 3.4$506

B. i& /ra,ius >= (0 1stem.out.println/ra,ius 2 ra,ius 2 3.4$506

C. i& /ra,ius > (0 1stem.out.println/ra,ius 2 ra,ius 2 3.4$506

D. i& /ra,ius


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D. The pro'ram runs an, ,isplas )t is even!.

3.9 1uppose is;rime is a :oolean varia:le* +hich o& the &ollo+in' is the correct an, :est statement &or

testin' i& is;rime is true.

A. i& /is;rime = true0

B. i& /is;rime == true0

C. i& /is;rime0

D. i& /!is;rime = &alse0

E. i& /!is;rime == &alse0

3.10 hat is the output o& the &ollo+in' co,e%

int 7 = (6

i& /7 < 40

7 = 7 # 6

1stem.out.println/"7 is " # 706

A. 7 is (

B. 7 is

C. 7 is ?

D. 7 is 3

E. 7 is 4

3.11 Anal9e the &ollo+in' co,e.

:oolean even = &alse6

i& /even0

1stem.out.println/")t is even!"06

A. The co,e ,isplas )t is even!

B. The co,e ,isplas nothin'.

C. The co,e is +ron'. @ou shoul, replace i& /even0 +ith i& /even == true0


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D. The co,e is +ron'. @ou shoul, replace i& /even0 +ith i& /even = true0

3.12 The &ollo+in' co,e ,isplas ___________.

,ou:le temperature = $(6

i& /temperature >= ((0

1stem.out.println/"too hot"06else i& /temperature


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3.14 1uppose income is 4((* +hat is the output o& the &ollo+in' co,e

i& /income > 3(((0

1stem.out.println/")ncome is 'reater than 3((("06

else i& /income > 4(((0

1stem.out.println/")ncome is 'reater than 4((("06

A. no output

B. )ncome is 'reater than 3(((

C. )ncome is 'reater than 3((( &ollo+e, : )ncome is 'reater than 4(((

D. )ncome is 'reater than 4(((

E. )ncome is 'reater than 4((( &ollo+e, : )ncome is 'reater than 3(((

3.15 The __________ metho, imme,iatel terminates the pro'ram.A. 1stem.terminate/(06

B. 1stem.halt/(06

C. 1stem.e7it/(06

D. 1stem.quit/(06

E. 1stem.stop/(06

3.16 1uppose ou +rite the co,e to ,ispla "Cannot 'et a ,rivers license" i& a'e is less than

an, "Can 'et a ,rivers license" i& a'e is 'reater than or equal to .

hich o& the &ollo+in' co,e is correct%

)

i& /a'e < 0

1stem.out.println/"Cannot 'et a ,rivers license"06i& /a'e >= 0

1stem.out.println/"Can 'et a ,rivers license"06

))

i& /a'e < 0

1stem.out.println/"Cannot 'et a ,rivers license"06else



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)))i& /a'e < 0

1stem.out.println/"Cannot 'et a ,rivers license"06

else i& /a'e >= 01stem.out.println/"Can 'et a ,rivers license"06

)i& /a'e < 0


else i& /a'e > 01stem.out.println/"Can 'et a ,rivers license"06

else i& /a'e == 0


A. )

B. ))

C. )))

D. )

3.17 1uppose ou +rite the co,e to ,ispla "Cannot 'et a ,rivers license" i& a'e is less than an,

"Can 'et a ,rivers license" i& a'e is 'reater than or equal to .hich o& the &ollo+in' co,e is the :est%

)

i& /a'e < 01stem.out.println/"Cannot 'et a ,rivers license"06

i& /a'e >= 01stem.out.println/"Can 'et a ,rivers license"06

))i& /a'e < 0


else


)))i& /a'e < 01stem.out.println/"Cannot 'et a ,rivers license"06

else i& /a'e >= 0


)i& /a'e < 0


else i& /a'e > 0


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1stem.out.println/"Can 'et a ,rivers license"06else i& /a'e == 0


A. )

B. ))

C. )))

D. )

1ections 3.83.33.18 hich o& the Boolean e7pressions :elo+ is incorrect%

A. /true0 FF /3 => 40

B. !/7 > (0 FF /7 > (0

C. /7 > (0 GG /7 < (0

D. /7 != (0 GG /7 = (0

E. /8( < 7 < (0

3.19 hich o& the &ollo+in' is the correct e7pression that evaluates to true i& the num:er 7 is :et+een

an, (( or the num:er is ne'ative%

A. < 7 < (( FF 7 < (

B. //7 < ((0 FF /7 > 00 GG /7 < (0

C. //7 < ((0 FF /7 > 00 FF /7 < (0

D. / > 7 > ((0 GG /7 < (0

3.20 Assume 7 = 4 an, = $* hich o& the &ollo+in' is true%

A. 7 < $ FF < $

B. 7 < $ GG < $

C. 7 > $ FF > $

D. 7 > $ GG > $


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3.21 Assume 7 = 4* hich o& the &ollo+in' is true%A. !/7 == 40

B. 7 != 4

C. 7 == $

D. 7 != $

3.22 Assume 7 = 4 an, = $* hich o& the &ollo+in' is true%

A. !/7 == 0

B. 7 !=

C. 7 ==

D. 7 >=

3.23 hich o& the &ollo+in' is equivalent to 7 != %

A. ! /7 == 0

B. 7 > FF 7 <

C. 7 > GG 7 <

D. 7 >= GG 7 (0 FF /7## > (0.

A. 5

B. (

C.

3.26 1uppose 7=( an, =( +hat is 7 a&ter evaluatin' the e7pression / >= (0 GG /788 > (0.


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A. 5

B. (

C.

3.27 1uppose 7=( an, =( +hat is 7 a&ter evaluatin' the e7pression / >= (0 GG /7## > (0.

A. 5

B. (

C.

3.28 To chec- +hether a char varia:le ch is an uppercase letter* ou +rite ___________.

A. /ch >= A FF ch >= H0

B. /ch >= A FF ch = A GG ch = A FF ch


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A. I

B. &

C. nothin'

D. I &

1ection 3.4 s+itch 1tatements

3.31 hat is a&ter the &ollo+in' s+itch statement is e7ecute,%

int 7 = 36 int = 46s+itch /7 # 30

case = (6

case = 6 ,e&ault #= 6

A.

B. ?

C. 3

D. 4

E. (


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3.32 hat +ill :e ,isplae, : the &ollo+in' s+itch statement%

char ch = a6

s+itch /ch0 case a

case A

1stem.out.print/ch06 :rea-6 case :

case B

1stem.out.print/ch06 :rea-6 case c

case C

1stem.out.print/ch06 :rea-6

case , case D

1stem.out.print/ch06

A. a:c,

B. a

C. aa

D. a:

E. a:c

3.33 hat +ill :e ,isplae, : the &ollo+in' s+itch statement%

char ch = :6

s+itch /ch0 case a


case : 1stem.out.print/ch06

case c


case , 1stem.out.print/ch06

A. a:c,

B. :c,


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C. :

D. ::

E. :::

3.34 Anal9e the &ollo+in' pro'ram &ra'ment

int 76,ou:le , = .$6

s+itch /,0 case .( 7 = 6

case .$ 7 = ?6

case ?.( 7 = 36

A. The pro'ram has a compile error :ecause the require, :rea- statement is missin' in the s+itch

statement.

B. The pro'ram has a compile error :ecause the require, ,e&ault case is missin' in the s+itch

statement.

C. The s+itch control varia:le cannot :e ,ou:le.

D. Ko errors.

1ection 3.$ Con,itional E7pressions3.35 hat is a&ter the &ollo+in' statement is e7ecute,%

7 = (6 = /7 > (0 % ( 8(6

A. 8(

B. (

C. (

D. ?(

E. )lle'al e7pression

3.36 Anal9e the &ollo+in' co,e &ra'ments that assi'n a :oolean value to the varia:le even.

Co,e


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i& /num:er ? == (0 even = true6

else

even = &alse6

Co,e ?

even = /num:er ? == (0 % true &alse6

Co,e 3

even = num:er ? == (6

A. Co,e ? has a compile error* :ecause ou cannot have true an, &alse literals in the con,itional

e7pression.

B. Co,e 3 has a compile error* :ecause ou attempt to assi'n num:er to even.

C. All three are correct* :ut Co,e is pre&erre,.

D. All three are correct* :ut Co,e ? is pre&erre,.

E. All three are correct* :ut Co,e 3 is pre&erre,.

3.37 hat is the output o& the &ollo+in' co,e% :oolean even = &alse6

1stem.out.println//even % "true" "&alse"006

A. true

B. &alse

C. nothin'

D. true &alse

1ection 3. Iormattin' Console Lutput an, 1trin's3.38 hich o& the &ollo+in' are vali, speci&iers &or the print& statement%

A. 4c

B. (:

C. ,

D. M.?,


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E. (.?e

3.39 The statement 1stem.out.print&/"3.&"* ?34.$0 outputs ___________.

A. ?3.4

B. ?3.$

C. ?34.$

D. ?34.$

E. ?34.

3.40 The statement 1stem.out.print&/"3.e"* ?34.$0 outputs ___________.

A. (.e#(4

B. (.?34$e#(4

C. (.?3e#(4

D. .?e#(3

E. .?3#(3

3.41 The statement 1stem.out.print&/"$,"* ?34$0 outputs ___________.

A. ?34$

B. ?34$

C. ?34$

D. ?34$.

3.42 The statement 1stem.out.print&/"(s"* "?34$"0 outputs ___________. /Kote 2 represents a

space0

A. ?34$2222

B. ?34$22222

C. ?34$22222

D. 2222?34$


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3.43 1uppse num:er contains inte'er value 4* +hich o& the &ollo+in' statement is correct%A. 1stem.out.print&/"3, 4,"* num:er* Nath.po+/num:er* .$006

B. 1stem.out.print&/"3, 4.?,"* num:er* Nath.po+/num:er* .$006

C. 1stem.out.print&/"3, 4.?&"* num:er* Nath.po+/num:er* .$006

D. 1stem.out.print&/"3& 4.?,"* num:er* Nath.po+/num:er* .$006

E. 1stem.out.print&/"3& 4.?&"* num:er* Nath.po+/num:er* .$006

3.44 Anal9e the &ollo+in' co,e

int i = 34346 ,ou:le , = 34346

1stem.out.print&/"$.& $.&"* i* ,06

A. The co,e compiles an, runs &ine to ,ispla 3434.( 3434.(.

B. The co,e compiles an, runs &ine to ,ispla 3434 3434.(.

C. i is an inte'er* :ut the &ormat speci&ier $.& speci&ies a &ormat &or ,ou:le value. The co,e has an

error.

1ection 3. Lperator ;rece,ence an, Associativit3.45 The or,er o& the prece,ence /&rom hi'h to lo+0 o& the operators :inar #* 2* FF* GG is

A. FF* GG* 2* #

B. 2* #* FF* GG

C. 2* #* GG* FF

D. GG* FF* 2* #

3.46 hat is ,isplae, in the &ollo+in' co,e%

pu:lic class Test

pu:lic static voi, main/1trin'OP ar's0

int 7 = 6 int = 7 = 7 # 6

1stem.out.println/" is " # 06


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A. is (.

B. is :ecause 7 is assi'ne, to &irst.

C. is ? :ecause 7 # is assi'ne, to 7 an, then 7 is assi'ne, to .

D. The pro'ram has a compile error since 7 is re,eclare, in the statement int = 7 = 7 # .

3.47 hich o& the &ollo+in' operators are ri'ht8associative.

A. 2

B. # /:inar #0

C.

D. FF

E. =

3.48 hat is the value o& the &ollo+in' e7pression%

true GG true FF &alseA. true

B. &alse

3.49 hich o& the &ollo+in' statements are true%

A. /7 > ( FF 7 < (0 is same as //7 > (0 FF /7 < (00

B. /7 > ( GG 7 < (0 is same as //7 > (0 GG /7 < (00

C. /7 > ( GG 7 < ( FF < (0 is same as /7 > ( GG /7 < ( FF < (00

D. /7 > ( GG 7 < ( FF < (0 is same as //7 > ( GG 7 < (0 FF < (0

chapter 3 selections.docx

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