564 + Mcqs in C Programming Page 2 McqOptions

51.	What is stderr ?
A.	standard error
B.	standard error types
C.	standard error streams
D.	standard error definitions
Answer» D. standard error definitions

Discussion

52.	What do the 'c' and 'v' in argv stands for?
A.	'c' means argument control 'v' means argument vector
B.	'c' means argument count 'v' means argument vertex
C.	'c' means argument count 'v' means argument vector
D.	'c' means argument configuration 'v' means argument visibility
Answer» D. 'c' means argument configuration 'v' means argument visibility

Discussion

53.	How many times "IndiaBIX" is get printed? #include<stdio.h> int main() { int x; for(x=-1; x<=10; x++) { if(x < 5) continue; else break; printf("IndiaBIX"); } return 0; }
A.	Infinite times
B.	11 times
C.	0 times
D.	10 times
Answer» D. 10 times

Discussion

54.	Which statement will you add in the following program to work it correctly? #include<stdio.h> int main() { printf("%f n", log(36.0)); return 0; }
A.	#include<conio.h>
B.	#include<math.h>
C.	#include<stdlib.h>
D.	#include<dos.h>
Answer» C. #include<stdlib.h>

Discussion

55.	How many times the while loop will get executed if a short int is 2 byte wide? #include<stdio.h> int main() { int j=1; while(j <= 255) { printf("%c %d n", j, j); j++; } return 0; }
A.	Infinite times
B.	255 times
C.	256 times
D.	254 times
Answer» C. 256 times

Discussion

56.	The keyword used to transfer control from a function back to the calling function is
A.	switch
B.	goto
C.	go back
D.	return
Answer» E.

Discussion

57.	What is the output of the program #include<stdio.h> int main() { int x = 10, y = 20, z = 5, i; i = x < y < z; printf("%d n", i); return 0; }
A.	0
B.	1
C.	Error
D.	None of these
Answer» C. Error

Discussion

58.	Size of short integer and long integer would vary from one platform to another.
A.	True
B.	False
Answer» B. False

Discussion

59.	What will be the output of the program? #include<stdio.h> int X=40; int main() { int X=20; printf("%d n", X); return 0; }
A.	20
B.	40
C.	Error
D.	No Output
Answer» B. 40

Discussion

60.	Range of float id -2.25e+308 to 2.25e+308
A.	True
B.	False
Answer» C.

Discussion

61.	What is the output of the program #include<stdio.h> int main() { extern int fun(float); int a; a = fun(3.14); printf("%d n", a); return 0; } int fun(int aa) { return (int)++aa; }
A.	3
B.	3.14
C.	0
D.	4
E.	Compile Error
Answer» F.

Discussion

62.	What is the output of the program #include<stdio.h> int main() { int a[5] = {2, 3}; printf("%d, %d, %d n", a[2], a[3], a[4]); return 0; }
A.	Garbage Values
B.	2, 3, 3
C.	3, 2, 2
D.	0, 0, 0
Answer» E.

Discussion

63.	What is the output of the program? #include<stdio.h> int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d n", u.ch[0], u.ch[1], u.i); return 0; }
A.	3, 2, 515
B.	515, 2, 3
C.	3, 2, 5
D.	None of these
Answer» B. 515, 2, 3

Discussion

64.	What will be the output of the program? #include<stdio.h> int main() { int X=40; { int X=20; printf("%d ", X); } printf("%d n", X); return 0; }
A.	40 40
B.	20 40
C.	20
D.	Error
Answer» C. 20

Discussion

65.	1 : typedef long a;extern int a c; 2 : typedef long a;extern a int c; 3 : typedef long a;extern a c;
A.	1 correct
B.	2 correct
C.	3 correct
D.	1, 2, 3 are correct
Answer» D. 1, 2, 3 are correct

Discussion

66.	Size of short integer and long integer can be verified using the sizeof() operator.
A.	True
B.	False
Answer» B. False

Discussion

67.	If the definition of the external variable occurs in the source file before its use in a particular function, then there is no need for an extern declaration in the function.
A.	True
B.	False
Answer» B. False

Discussion

68.	A long double can be used if range of a double is not enough to accommodate a real number.
A.	True
B.	False
Answer» B. False

Discussion

69.	A float is 4 bytes wide, whereas a double is 8 bytes wide.
A.	True
B.	False
Answer» B. False

Discussion

70.	Range of double is -1.7e-38 to 1.7e+38 (in 16 bit platform - Turbo C under DOS)
A.	True
B.	False
Answer» C.

Discussion

71.	What is the output of the program given below ? #include<stdio.h> int main() { enum status { pass, fail, atkt}; enum status stud1, stud2, stud3; stud1 = pass; stud2 = atkt; stud3 = fail; printf("%d, %d, %d n", stud1, stud2, stud3); return 0; }
A.	0, 1, 2
B.	1, 2, 3
C.	0, 2, 1
D.	1, 3, 2
Answer» D. 1, 3, 2

Discussion

72.	What will be the output of the program in 16 bit platform (Turbo C under DOS)? #include<stdio.h> int main() { extern int i; i = 20; printf("%d n", sizeof(i)); return 0; }
A.	2
B.	4
C.	vary from compiler
D.	Linker Error : Undefined symbol
E.	<i class="C-code">'i'</i>
Answer» E. <i class="C-code">'i'</i>

Discussion

73.	What is the output of the program? #include<stdio.h> int main() { extern int a; printf("%d n", a); return 0; } int a=20;
A.	20
B.	0
C.	Garbage Value
D.	Error
Answer» B. 0

Discussion

74.	What is the output of the program in Turbo C (in DOS 16-bit OS)? #include<stdio.h> int main() { char s1; char far s2; char huge *s3; printf("%d, %d, %d n", sizeof(s1), sizeof(s2), sizeof(s3)); return 0; }
A.	2, 4, 6
B.	4, 4, 2
C.	2, 4, 4
D.	2, 2, 2
Answer» D. 2, 2, 2

Discussion

75.	What is the output of the program #include<stdio.h> int main() { struct emp { char name[20]; int age; float sal; }; struct emp e = {"Tiger"}; printf("%d, %f n", e.age, e.sal); return 0; }
A.	0, 0.000000
B.	Garbage values
C.	Error
D.	None of above
Answer» B. Garbage values

Discussion

76.	Is there any difference in the following declarations? int myfun(int arr[]);int myfun(arr[20]);
A.	Yes
B.	No
Answer» B. No

Discussion

77.	Suppose a program is divided into three files f1, f2 and f3, and a variable is defined in the file f1 but used in files f2 and f3. In such a case would we need the extern declaration for the variables in the files f2 and f3?
A.	Yes
B.	No
Answer» B. No

Discussion

78.	Global variable are available to all functions. Does there exist a mechanism by way of which it available to some and not to others.
A.	Yes
B.	No
Answer» C.

Discussion

79.	Is it true that a global variable may have several declarations, but only one definition?
A.	Yes
B.	No
Answer» B. No

Discussion

80.	Is it true that a function may have several declarations, but only one definition?
A.	Yes
B.	No
Answer» B. No

Discussion

81.	Which of the following operations are INCORRECT?
A.	<pre><code class="cpp">int i = 35; i = i%5;</code></pre>
B.	<pre><code class="cpp">short int j = 255; j = j;</code></pre>
C.	<pre><code class="cpp">long int k = 365L; k = k;</code></pre>
D.	<pre><code class="cpp">float a = 3.14; a = a%3;</code></pre>
Answer» E.

Discussion

82.	Which of the following correctly represents a long double constant?
A.	6.68
B.	6.68L
C.	6.68f
D.	6.68LF
Answer» C. 6.68f

Discussion

83.	Which of the structure is correct? 1 : struct book { char name[10]; float price; int pages; }; 2 : struct aa { char name[10]; float price; int pages; } 3 : struct aa { char name[10]; float price; int pages; }
A.	1
B.	2
C.	3
D.	All of above
Answer» B. 2

Discussion

84.	Which of the declaration is correct?
A.	int length;
B.	char int;
C.	int long;
D.	float double;
Answer» B. char int;

Discussion

85.	What will be the output of the program? #include<stdio.h> int main() { const int i=0; printf("%d n", i++); return 0; }
A.	10
B.	11
C.	No output
D.	Error: ++needs a value
Answer» E.

Discussion

86.	Which standard library function will you use to find the last occurance of a character in a string in C?
A.	strnchar()
B.	strchar()
C.	strrchar()
D.	strrchr()
Answer» E.

Discussion

87.	How many times the program will print "IndiaBIX" ? #include<stdio.h> int main() { printf("IndiaBIX"); main(); return 0; }
A.	Infinite times
B.	32767 times
C.	65535 times
D.	Till stack overflows
Answer» E.

Discussion

88.	How will you free the allocated memory ?
A.	remove(var-name);
B.	free(var-name);
C.	delete(var-name);
D.	dalloc(var-name);
Answer» C. delete(var-name);

Discussion

89.	What will be the output of the program? #include<stdio.h> #include<stdarg.h> void fun1(int num, ...); void fun2(int num, ...); int main() { fun1(1, "Apple", "Boys", "Cats", "Dogs"); fun2(2, 12, 13, 14); return 0; } void fun1(int num, ...) { char str; va_list ptr; va_start(ptr, num); str = va_arg(ptr, char ); printf("%s ", str); } void fun2(int num, ...) { va_list ptr; va_start(ptr, num); num = va_arg(ptr, int); printf("%d", num); }
A.	Dogs 12
B.	Cats 14
C.	Boys 13
D.	Apple 12
Answer» E.

Discussion

90.	What will you do to treat the constant 3.14 as a long double?
A.	use 3.14LD
B.	use 3.14L
C.	use 3.14DL
D.	use 3.14LF
Answer» C. use 3.14DL

Discussion

91.	Which of the structure is incorrcet? 1 : struct aa { int a; float b; }; 2 : struct aa { int a; float b; struct aa var; }; 3 : struct aa { int a; float b; struct aa *var; };
A.	1
B.	2
C.	3
D.	1, 2, 3
Answer» C. 3

Discussion

92.	Does there any function exist to convert the int or float to a string?
A.	Yes
B.	No
Answer» B. No

Discussion

93.	According to ANSI specifications which is the correct way of declaring main when it receives command-line arguments?
A.	<pre><code class="cpp">int main(int argc, char *argv[])</code></pre>
B.	<pre><code class="cpp">int main(argc, argv) int argc; char *argv; </code></pre>
C.	<pre><code class="cpp">int main() { int argc; char *argv; } </code></pre>
D.	None of above
Answer» B. <pre><code class="cpp">int main(argc, argv) int argc; char *argv; </code></pre>

Discussion

94.	Which files will get closed through the fclose() in the following program? #include<stdio.h> int main() { FILE fs, ft, *fp; fp = fopen("A.C", "r"); fs = fopen("B.C", "r"); ft = fopen("C.C", "r"); fclose(fp, fs, ft); return 0; }
A.	"A.C" "B.C" "C.C"
B.	"B.C" "C.C"
C.	"A.C"
D.	Error in
E.	<i class="C-code">fclose()</i>
Answer» E. <i class="C-code">fclose()</i>

Discussion

95.	In a file contains the line "I am a boy r n" then on reading this line into the array str using fgets(). What will str contain?
A.	"I am a boy r n 0"
B.	"I am a boy r 0"
C.	"I am a boy n 0"
D.	"I am a boy"
Answer» D. "I am a boy"

Discussion

96.	Which header file should you include, if you are going to develop a function, which can accept variable number of arguments?
A.	varagrg.h
B.	stdlib.h
C.	stdio.h
D.	stdarg.h
Answer» E.

Discussion

97.	The library function used to find the last occurrence of a character in a string is
A.	strnstr()
B.	laststr()
C.	strrchr()
D.	strstr()
Answer» D. strstr()

Discussion

98.	In the following code snippet can we declare a new typedef named ptr even though struct employee has not been completely declared while using typedef? typedef struct employee *ptr; struct employee { char name[20]; int age; ptr next; }
A.	Yes
B.	No
Answer» B. No

Discussion

99.	What will be the output of the program? #include<stdio.h> int main() { enum color{red, green, blue}; typedef enum color mycolor; mycolor m = red; printf("%d", m); return 0; }
A.	1
B.	0
C.	2
D.	red
Answer» C. 2

Discussion

100.	What will be the output of the program? #include<stdio.h> int main() { char huge near ptr1; char huge far ptr2; char huge huge ptr3; printf("%d, %d, %d n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }
A.	4, 4, 8
B.	2, 4, 4
C.	4, 4, 2
D.	2, 4, 8
Answer» C. 4, 4, 2

Discussion

Explore topic-wise MCQs in Engineering.

What is stderr ?

What do the 'c' and 'v' in argv stands for?

How many times "IndiaBIX" is get printed? #include&lt;stdio.h&gt; int main() { int x; for(x=-1; x&lt;=10; x++) { if(x &lt; 5) continue; else break; printf("IndiaBIX"); } return 0; }

Which statement will you add in the following program to work it correctly? #include&lt;stdio.h&gt; int main() { printf("%f n", log(36.0)); return 0; }

How many times the while loop will get executed if a short int is 2 byte wide? #include&lt;stdio.h&gt; int main() { int j=1; while(j &lt;= 255) { printf("%c %d n", j, j); j++; } return 0; }

The keyword used to transfer control from a function back to the calling function is

What is the output of the program #include&lt;stdio.h&gt; int main() { int x = 10, y = 20, z = 5, i; i = x &lt; y &lt; z; printf("%d n", i); return 0; }

Size of short integer and long integer would vary from one platform to another.

What will be the output of the program? #include&lt;stdio.h&gt; int X=40; int main() { int X=20; printf("%d n", X); return 0; }

Range of float id -2.25e+308 to 2.25e+308

What is the output of the program #include&lt;stdio.h&gt; int main() { extern int fun(float); int a; a = fun(3.14); printf("%d n", a); return 0; } int fun(int aa) { return (int)++aa; }

What is the output of the program #include&lt;stdio.h&gt; int main() { int a[5] = {2, 3}; printf("%d, %d, %d n", a[2], a[3], a[4]); return 0; }

What is the output of the program? #include&lt;stdio.h&gt; int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d n", u.ch[0], u.ch[1], u.i); return 0; }

What will be the output of the program? #include&lt;stdio.h&gt; int main() { int X=40; { int X=20; printf("%d ", X); } printf("%d n", X); return 0; }

1 : typedef long a;extern int a c; 2 : typedef long a;extern a int c; 3 : typedef long a;extern a c;

Size of short integer and long integer can be verified using the sizeof() operator.

If the definition of the external variable occurs in the source file before its use in a particular function, then there is no need for an extern declaration in the function.

A long double can be used if range of a double is not enough to accommodate a real number.

A float is 4 bytes wide, whereas a double is 8 bytes wide.

Range of double is -1.7e-38 to 1.7e+38 (in 16 bit platform - Turbo C under DOS)

What is the output of the program given below ? #include&lt;stdio.h&gt; int main() { enum status { pass, fail, atkt}; enum status stud1, stud2, stud3; stud1 = pass; stud2 = atkt; stud3 = fail; printf("%d, %d, %d n", stud1, stud2, stud3); return 0; }

What will be the output of the program in 16 bit platform (Turbo C under DOS)? #include&lt;stdio.h&gt; int main() { extern int i; i = 20; printf("%d n", sizeof(i)); return 0; }

What is the output of the program? #include&lt;stdio.h&gt; int main() { extern int a; printf("%d n", a); return 0; } int a=20;

What is the output of the program in Turbo C (in DOS 16-bit OS)? #include&lt;stdio.h&gt; int main() { char *s1; char far *s2; char huge *s3; printf("%d, %d, %d n", sizeof(s1), sizeof(s2), sizeof(s3)); return 0; }

What is the output of the program #include&lt;stdio.h&gt; int main() { struct emp { char name[20]; int age; float sal; }; struct emp e = {"Tiger"}; printf("%d, %f n", e.age, e.sal); return 0; }

Is there any difference in the following declarations? int myfun(int arr[]);int myfun(arr[20]);

Suppose a program is divided into three files f1, f2 and f3, and a variable is defined in the file f1 but used in files f2 and f3. In such a case would we need the extern declaration for the variables in the files f2 and f3?

Global variable are available to all functions. Does there exist a mechanism by way of which it available to some and not to others.

Is it true that a global variable may have several declarations, but only one definition?

Is it true that a function may have several declarations, but only one definition?

Which of the following operations are INCORRECT?

Which of the following correctly represents a long double constant?

Which of the structure is correct? 1 : struct book { char name[10]; float price; int pages; }; 2 : struct aa { char name[10]; float price; int pages; } 3 : struct aa { char name[10]; float price; int pages; }

Which of the declaration is correct?

What will be the output of the program? #include&lt;stdio.h&gt; int main() { const int i=0; printf("%d n", i++); return 0; }

Which standard library function will you use to find the last occurance of a character in a string in C?

How many times the program will print "IndiaBIX" ? #include&lt;stdio.h&gt; int main() { printf("IndiaBIX"); main(); return 0; }

How will you free the allocated memory ?

What will you do to treat the constant 3.14 as a long double?

Which of the structure is incorrcet? 1 : struct aa { int a; float b; }; 2 : struct aa { int a; float b; struct aa var; }; 3 : struct aa { int a; float b; struct aa *var; };

Does there any function exist to convert the int or float to a string?

According to ANSI specifications which is the correct way of declaring main when it receives command-line arguments?

Which files will get closed through the fclose() in the following program? #include&lt;stdio.h&gt; int main() { FILE *fs, *ft, *fp; fp = fopen("A.C", "r"); fs = fopen("B.C", "r"); ft = fopen("C.C", "r"); fclose(fp, fs, ft); return 0; }

In a file contains the line "I am a boy r n" then on reading this line into the array str using fgets(). What will str contain?

Which header file should you include, if you are going to develop a function, which can accept variable number of arguments?

The library function used to find the last occurrence of a character in a string is

In the following code snippet can we declare a new typedef named ptr even though struct employee has not been completely declared while using typedef? typedef struct employee *ptr; struct employee { char name[20]; int age; ptr next; }

What will be the output of the program? #include&lt;stdio.h&gt; int main() { enum color{red, green, blue}; typedef enum color mycolor; mycolor m = red; printf("%d", m); return 0; }

What will be the output of the program? #include&lt;stdio.h&gt; int main() { char huge *near *ptr1; char huge *far *ptr2; char huge *huge *ptr3; printf("%d, %d, %d n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }

How many times "IndiaBIX" is get printed? #include<stdio.h> int main() { int x; for(x=-1; x<=10; x++) { if(x < 5) continue; else break; printf("IndiaBIX"); } return 0; }

Which statement will you add in the following program to work it correctly? #include<stdio.h> int main() { printf("%f n", log(36.0)); return 0; }

How many times the while loop will get executed if a short int is 2 byte wide? #include<stdio.h> int main() { int j=1; while(j <= 255) { printf("%c %d n", j, j); j++; } return 0; }

What is the output of the program #include<stdio.h> int main() { int x = 10, y = 20, z = 5, i; i = x < y < z; printf("%d n", i); return 0; }

What will be the output of the program? #include<stdio.h> int X=40; int main() { int X=20; printf("%d n", X); return 0; }

What is the output of the program #include<stdio.h> int main() { extern int fun(float); int a; a = fun(3.14); printf("%d n", a); return 0; } int fun(int aa) { return (int)++aa; }

What is the output of the program #include<stdio.h> int main() { int a[5] = {2, 3}; printf("%d, %d, %d n", a[2], a[3], a[4]); return 0; }

What is the output of the program? #include<stdio.h> int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d n", u.ch[0], u.ch[1], u.i); return 0; }

What will be the output of the program? #include<stdio.h> int main() { int X=40; { int X=20; printf("%d ", X); } printf("%d n", X); return 0; }

What is the output of the program given below ? #include<stdio.h> int main() { enum status { pass, fail, atkt}; enum status stud1, stud2, stud3; stud1 = pass; stud2 = atkt; stud3 = fail; printf("%d, %d, %d n", stud1, stud2, stud3); return 0; }

What will be the output of the program in 16 bit platform (Turbo C under DOS)? #include<stdio.h> int main() { extern int i; i = 20; printf("%d n", sizeof(i)); return 0; }

What is the output of the program? #include<stdio.h> int main() { extern int a; printf("%d n", a); return 0; } int a=20;

What is the output of the program in Turbo C (in DOS 16-bit OS)? #include<stdio.h> int main() { char s1; char far s2; char huge *s3; printf("%d, %d, %d n", sizeof(s1), sizeof(s2), sizeof(s3)); return 0; }

What is the output of the program #include<stdio.h> int main() { struct emp { char name[20]; int age; float sal; }; struct emp e = {"Tiger"}; printf("%d, %f n", e.age, e.sal); return 0; }

What will be the output of the program? #include<stdio.h> int main() { const int i=0; printf("%d n", i++); return 0; }

How many times the program will print "IndiaBIX" ? #include<stdio.h> int main() { printf("IndiaBIX"); main(); return 0; }

Which files will get closed through the fclose() in the following program? #include<stdio.h> int main() { FILE fs, ft, *fp; fp = fopen("A.C", "r"); fs = fopen("B.C", "r"); ft = fopen("C.C", "r"); fclose(fp, fs, ft); return 0; }

What will be the output of the program? #include<stdio.h> int main() { enum color{red, green, blue}; typedef enum color mycolor; mycolor m = red; printf("%d", m); return 0; }

What will be the output of the program? #include<stdio.h> int main() { char huge near ptr1; char huge far ptr2; char huge huge ptr3; printf("%d, %d, %d n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }