MCQs

OBJECTIVE TYPE QUESTIONS Choose correct or the best alternative in the following Q!" What is the output of the following program? main ( ) { int x = 2, y = 5;if (x < y) return (x = x+y); else printf (z1);printf(z2); } #$%z2#B%z1z2 #C% Compilation error#&%None of these $ns & There is no compilation error but there will no output because function is returning avalue and if statement is true in this case. Q!' Choose the correct one #$% Address operator can not be applied to register variables #B% Address operator can be applied to register variables #C% se of register declaration will increase the e!ecution time #&% None of the above $ns & A register access is much faster than a memor" access# $eeping the fre%uentl"accessed variables in the register will lead to faster e!ecution of programs. Q!(What is the output of the followingprogram? main ( ) {extern int x; x = 20; printf(n!", x); } #$%B%2& #C% error#&%garbagevalue $ns C 'utput of the given program will be ()in$er error*undefined s"mbol !+. ,!ternalvariables are declared outside a function. Q!)-f ! is one dimensional arra"# then pic$ up the correct answer 1 #$% ./! 0 i1 is same as 2!3i4#B%.2!3i4 is same as ! 0 i #C%./! 0 i1 is same as !3i4 01#&%./! 0 i1 is same as .!3i4 $ns $ num3i4 is same as ./num0i1 Q!*Consider the following declarationint a, #$ = %a, ##& = %$;The following program fragment a = '; ##& = 5;#$% does not change the value of a #B%assigns address of c to a #C%assigns the value of b to a #&%assigns 5 to a $ns & The given statements assigns 5 to a Q!+Choose the correct answer #$%enumvariable can not be assigned newvalues #B% enum variable can be compared #C% enumeration feature increase the power of C #&% None of the above $ns C Theenumerateddatat"pesgiveanopportunit"toinventourowndatat"peanddefine what value the variable of this data t"pe can ta$e. Q!, The content of file will be lost if it is opened in#$% w mode#B%w0 mode #C%a mode#&%a0 mode

$ns $ When the mode is writing# the contents are deleted and the file is opened as a newfile. Q!- Consider thefollowingcodesegment6inta(10), #p1, #p2; p1 = %a('); p2 = %a(*); Which of the following statements is incorrect w.r.t. pointers? #$%p1 0 2#B%p2 7 2 #C%p2 0 p1#&%p2 7 p1 $ns C Addition of two pointers is not allowed. Q!". The second e!pression /8 7 $1 in the following e!pression will be evaluated2 (i + 5) %% (+ , -) #$% if e!pression /i 0 51 is true. #B% if e!pression /i 0 51 is false. #C% irrespective of whether /i 0 51 is true or false.#&%will not beevaluated in an" case. $ns $ -n a compound logical e!pression combined with 22# the second e!pressionis evaluated onl" if first is evaluated in true. Q!"" -n the for statement6 f.r (exp1; exp2; exp/) { 0 } where e!p1# e!p2and e!p9 are e!pressions. What is optional? #$% None of the e!pressions is optional. #B% 'nl" e!p1 is optional. #C% 'nl" e!p1 and e!p9 are optional. #&% All the e!pressions are optional. $ns & All the e!pressions are optional. :or /;;1 is a valid statement in C. Q!"'The output of the following code segment will be &1ar x = 234;s5it&1 (x) {&ase 2647 printf(a);&ase 2347 printf($);&ase 2847 printf(&); } #$%&) #$% A5#B%C #C%*1C#&%*15 $ns $ the value of the arithmetic e!pression is A5 as 2.909./DE51?C09.19?C09B?A5 Q!'" A global variable is a variable#$% declared in the main / 1 function. #B% declared in an" function other than the main / 1 function. #C% declared outside the bod" of ever" function. #&% declared an" wherein the C program. $ns C A global variable is declared outside the bod" of ever" function. Q!'' main / 1 is an e!ample of #$%librar" function #B%user defined function #C%header#&%statement $ns $ main/1 is a special function used b" C s"stem to tell the computer where theprogram starts. Q!'/ While incrementing a pointer# its value gets increased b" the length of thedata t"pe to which it points. This length is called #$%scale factor #B%length factor #C%pointer factor#&%increment factor $ns & While incrementinga pointer# its value gets increased b" the length of thedata t"pe to which it points. Q!'( The first digit of a decimal constant must be #$%a zero#B%a non zero number #C%a negative number#&%an integer $ns & Fecimal constants consist of a set of digit# & to B# preceded b" an optional 7or 0 sign. Q!')What is the output of the following statement6printf (!>/",12/'5); #$%1 2 9#B%*1 2 9#C%1 2 9 A 5#&%12 $ns C printf statement would print 129A5. Q!'* A single character input from the $e"board can be obtained b" using the function. #$% printf / 1#B% scanf / 1 C #C% putchar / 1#&% getchar / 1 $ns & Geading a single character can be done b" using the function getchar/ 1. Q!'+ The function ftell/ 1 #$% reads a character from a file #B% reads an integer from a file #C% gives the current position in the file #&% sets the position to the beginning of the file. $ns C ftell/ 1 ta$es a file pointer and returns a number of t"pe long# thatcorresponds to the current position. Q!', -f the variables i# 8 and $ are assigned the values 5#9 and 2 respectivel"# thenthe e!pression i = + + ( - + + = * ) + A #$%gives an error message#B%assigns a value 1C to i #C%assigns a value 1D to i#&%assigns a value 1B to i $ns $ -t gives an error message*)value re%uired. Q!'- -f an integer needs two b"tes of storage# then the ma!imum value of a signed integer is #$%21C*1#B%215*1 #C%21C#&%215 $ns B -f we use a 1C bit word length# the size of the integer value is limited to the range *215 to 215*1 Q!/. )iteral means #$%a string#B%a string constant #C%a character#&%an alphabet $ns B )iteral means a string constant. Q!/" -f H"> is of integer t"pe then the e!pressions 9(" D)IB and (" D)IB9#$% must "ield the same value. #B% must "ield different values. #C% ma" or ma" not "ield the same value. #&% none of the above. J $ns C The e!pression ma" or ma" not "ield the same value. Q!/'-n the following code fragment int x, y = 2, z, a;x=(y#=2) + (z=a=y);printf (2!"4,x); /A1 prints D /1) n l.D n = N(n l.D n) Q!,+The result of evaluating the following postfi! e!pression is 5# J# B# .# 0# A# B# 9# I# 0# * #$%5B%C5 #C%C1#&%CB $ns (C) Q!,, A graph with n vertices will definitel" have a parallel edge or self loop if the total numberofedges are #$%more than n#B%more than n6" #C%more than #n6"%7' $ns (D) #&%morethann#n8"%7' Q!,- 'ut of the following# the slowest sorting procedure is #$%Suic$ =ort#B%@eap =ort #C%=hell =ort#&%