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1. Inthefollowingcodewhatis'P'?

typedefchar*charpconstcharpP

A. Pisaconstant B. Pisacharacterconstant

C. Pischaractertype D. Noneofabove

Answer:OptionA

Learnmoreproblemson:Typedef

Discussaboutthisproblem:DiscussinForum

2. Whatwillbetheoutputoftheprogram?

#includeintfun(int,int)typedefint(*pf)(int,int)intproc(pf,int,int)

intmain(){printf("%d\n",proc(fun,6,6))return0}intfun(inta,intb){return(a==b)}intproc(pfp,inta,intb){return((*p)(a,b))}

A. 6 B. 1

C. 0 D. 1

Answer:OptionB

Learnmoreproblemson:Functions


3. Pointouttheerrorintheprogram?

#include#includevoidmodify(structemp*)structemp{charname[20]intage}intmain(){structempe={"Sanjay",35}modify(&e)printf("%s%d",e.name,e.age)

Marks:10/20

Totalnumberofquestions : 20

Numberofansweredquestions : 17

Numberofunansweredquestions : 3

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return0}voidmodify(structemp*p){p>age=p>age+2}

A. Error:instructure

B. Error:inprototypedeclarationunknownstructemp

C. Noerror

D. Noneofabove

Answer:OptionB

Explanation:

Thestructempismentionedintheprototypeofthefunctionmodify()beforedeclaringthestructure.Tosolvethisproblemdeclarestructempbeforethemodify()prototype.

Learnmoreproblemson:Structures,Unions,Enums



#include

intmain(){charhuge*near*far*ptr1charnear*far*huge*ptr2charfar*huge*near*ptr3printf("%d,%d,%d\n",sizeof(**ptr1),sizeof(ptr2),sizeof(*ptr3))return0}

A. 4,4,4 B. 2,2,2

C. 2,8,4 D. 2,4,8

Answer:OptionA

Learnmoreproblemson:ComplicatedDeclarations


5. ApointerunionCANNOTbecreatedA. Yes B. No

Answer:OptionB



6. Whichofthefollowingcannotbecheckedinaswitchcasestatement?A. Character B. Integer

C. Float D. enum

Answer:OptionC

Explanation:

Theswitch/casestatementintheclanguageisdefinedbythelanguagespecificationtouseanintvalue,soyoucannotuseafloatvalue.

switch(expression){caseconstantexpression1:statements1

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caseconstantexpression2:statements2caseconstantexpression3:statements3......default:statements4}

Thevalueofthe'expression'inaswitchcasestatementmustbeaninteger,char,short,long.Floatanddoublearenotallowed.

Learnmoreproblemson:ControlInstructions


7. Afilewrittenintextmodecanbereadbackinbinarymode.A. Yes B. No

Answer:OptionB

Explanation:

Thedifferenceisthattextfilescontainlines(orrecords)oftextandeachofthesehasanendoflinemarkerautomaticallyappendedtotheendofitwheneveryouindicatethatyouhavereachedtheendofaline.

Binaryfilesarenotbrokenupintoseparatelinesorrecordssotheendoflinemarkerisnotwrittenwhenwritingtoabinaryfile.

So,wecannotreadthecorrectthedatainbinarymode.

Learnmoreproblemson:Input/Output



#includeintmain(){float*pprintf("%d\n",sizeof(p))return0}

A. 2in16bitcompiler,4in32bitcompiler

B. 4in16bitcompiler,2in32bitcompiler

C. 4in16bitcompiler,4in32bitcompiler

D. 2in16bitcompiler,2in32bitcompiler

Answer:OptionA

Explanation:

sizeof(x)returnsthesizeofxinbytes.float*pisapointertoafloat.

In16bitcompiler,thepointersizeisalways2bytes.In32bitcompiler,thepointersizeisalways4bytes.

Learnmoreproblemson:FloatingPointIssues


9. WhichofthefollowingarecorrectpreprocessordirectivesinC?1: #ifdef2: #if3: #elif4: #undef

A. 1,2 B. 4

C. 1,2,4 D. 1,2,3,4

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Answer:OptionD

Explanation:

Themacros#ifdef#if#elifarecalledconditionalmacros.

Themacro#undefundefinetheprevioslydeclaredmacrosymbol.

Henceallthegivenstatementsaremacropreprocessordirectives.

Learnmoreproblemson:CPreprocessor


10. Pointouttheerrorinthefollowingprogram.

#include#includevoiddisplay(char*s,...)voidshow(char*t,...)

intmain(){display("Hello",4,12,13,14,44)return0}voiddisplay(char*s,...){show(s,...)}voidshow(char*t,...){intava_listptrva_start(ptr,s)a=va_arg(ptr,int)printf("%f",a)}

A. Error:invalidfunctiondisplay()call

B. Error:invalidfunctionshow()call

C. Noerror

D. Error:Rvaluerequiredfort

Answer:OptionB

Explanation:

Thecalltoshow()isimproper.Thisisnotthewaytopassvariableargumentlisttoafunction.

Learnmoreproblemson:VariableNumberofArguments


11.Unionelementscanbeofdifferentsizes.A. True B. False

Answer:OptionA



12. Afunctionmayhaveanynumberofreturnstatementseachreturningdifferentvalues.A. True B. False

Answer:OptionA

Explanation:

True,Afunctionmayhaveanynumberofreturnstatementseachreturningdifferentvalues

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andeachreturnstatementswillnotoccursuccessively.

Learnmoreproblemson:Functions


13. Pointouttheerror,ifanyintheprogram.

#includeintmain(){inti=1switch(i){printf("Thisiscprogram.")case1:printf("Case1")breakcase2:printf("Case2")break}return0}

A. Error:Nodefaultspecified

B. Error:Invalidprintfstatementafterswitchstatement

C. NoErrorandprints"Case1"

D. Noneofabove

Answer:OptionC

Explanation:

switch(i)becomesswitch(1),thenthecase1:blockisgetexecuted.Henceitprints"Case1".

printf("Thisiscprogram.")isignoredbythecompiler.

Hencethereisnoerrorandprints"Case1".



14.Whatwillbetheoutputoftheprogram?

#include

intmain(){enumcolor{red,green,blue}typedefenumcolormycolormycolorm=redprintf("%d",m)return0}

A. 1 B. 0

C. 2 D. red

Answer:OptionB

Learnmoreproblemson:Typedef



#includeintmain(){

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inti=3,j=2,k=0,mm=++i&&++j&&++kprintf("%d,%d,%d,%d\n",i,j,k,m)return0}

A. 2,3,1,1 B. 2,3,1,2

C. 1,2,3,1 D. 3,3,1,2

Answer:OptionA

Explanation:

Step1:inti=3,j=2,k=0,mherevariablei,j,k,maredeclaredasanintegertypeandvariablei,j,kareinitializedto3,2,0respectively.

Step2:m=++i&&++j&&++kbecomesm=2&&3&&1becomesm=TRUE&&TRUEHencethisstatementbecomesTRUE.Soitreturns'1'(one).Hencem=1.

Step3:printf("%d,%d,%d,%d\n",i,j,k,m)Inthepreviousstepthevalueofi,j,kareincreementedby'1'(one).

Hencetheoutputis"2,3,1,1".

Learnmoreproblemson:Expressions



#includeintmain(){inti=4,j=1,k=0,w,x,y,zw=i||j||kx=i&&j&&ky=i||j&&kz=i&&j||kprintf("%d,%d,%d,%d\n",w,x,y,z)return0}

A. 1,1,1,1 B. 1,1,0,1

C. 1,0,0,1 D. 1,0,1,1

Answer:OptionD

Explanation:

Step1:inti=4,j=1,k=0,w,x,y,zherevariablei,j,k,w,x,y,zaredeclaredasanintegertypeandthevariablei,j,kareinitializedto4,1,0respectively.

Step2:w=i||j||kbecomesw=4||1||0.HenceitreturnsTRUE.So,w=1

Step3:x=i&&j&&kbecomesx=4&&1&&0HenceitreturnsFALSE.So,x=0

Step4:y=i||j&&kbecomesy=4||1&&0HenceitreturnsTRUE.So,y=1

Step5:z=i&&j||kbecomesz=4&&1||0HenceitreturnsTRUE.So,z=1.

Step6:printf("%d,%d,%d,%d\n",w,x,y,z)Hencetheoutputis"1,0,1,1".

Learnmoreproblemson:Expressions



#include

intmain(){intichara[]="\0"if(printf("%s",a))

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printf("Thestringisempty\n")elseprintf("Thestringisnotempty\n")return0}

A. Thestringisempty B. Thestringisnotempty

C. Nooutput D. 0

Answer:OptionB

Explanation:

Thefunctionprintf()returnsthenumberofcharectersprintedontheconsole.

Step1:chara[]="\0"Thevariableaisdeclaredasanarrayofcharactersanditinitializedwith"\0".Itdenotesthatthestringisempty.

Step2:if(printf("%s",a))Theprintf()statementdoesnotprintanything,soitreturns'0'(zero).Hencetheifconditionisfailed.

Intheelsepartitprints"Thestringisnotempty".

Learnmoreproblemson:Strings


18.Declarethefollowingstatement?"Apointertoanarrayofthreechars".

A. char*ptr[3]() B. char(*ptr)*[3]

C. char(*ptr[3])() D. char(*ptr)[3]

Answer:OptionD

Learnmoreproblemson:ComplicatedDeclarations


19. AcharvariablecanstoreeitheranASCIIcharacteroraUnicodecharacter.A. True B. False

Answer:OptionA

Explanation:

Yes,wecanstoreeitheranASCIIcharacteroraUnicodecharacterinacharvariable.



20.Howwillyoufreethememoryallocatedbythefollowingprogram?

#include#include#defineMAXROW3#defineMAXCOL4

intmain(){int**p,i,jp=(int**)malloc(MAXROW*sizeof(int*))return0}

A. memfree(intp) B. dealloc(p)

C. malloc(p,0) D. free(p)

Answer:OptionD

Learnmoreproblemson:MemoryAllocation

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