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<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; } 

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

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;
}

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

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; } 

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

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; } 

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<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; } 

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?

struct book
{ char name[10]; float price; int pages;
};

struct aa
{ char name[10]; float price; int pages;
}

struct aa
{ char name[10]; float price; int pages;
}

Which of the declaration is correct?

What will be the output of the program?

#include<stdio.h> 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<stdio.h> int main()
{ printf("IndiaBIX"); main(); return 0;
}

How will you free the allocated memory ?

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);
}

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

Which of the structure is incorrcet?

struct aa
{ int a; float b;
};

struct aa
{ int a; float b; struct aa var;
};

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<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;
}

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<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; }