C Language quiz questions

The maximum combined length of the command-line arguments including the spaces between adjacent arguments is

1. 128 characters

2. 256 characters

3. 67 characters

4. It may vary from one operating system to another

While calling the fprintf() function in the format string conversion specifier %s can be used to write a character string in capital letters.

1. True

2.  

   False

What will be the output of the program ?

#include<stdio.h>
int main()
{
    FILE *ptr;
    char i;
    ptr = fopen("myfile.c", "r");
    while((i=fgetc(ptr))!=NULL)
        printf("%c", i);
    return 0;
}

1. Print the contents of file "myfile.c"

2. Print the contents of file "myfile.c" upto NULL character

3. Infinite loop

4. Error in program

Point out the error in the program?

struct emp
{
    int ecode;
    struct emp e;
};

1. Error: in structure declaration

2. Linker Error

3. No Error

4. None of above

What will be the output of the program ?

#include<stdio.h>
int main()
{
    enum status {pass, fail, absent};
    enum status stud1, stud2, stud3;
    stud1 = pass;
    stud2 = absent;
    stud3 = fail;
    printf("%d %d %d\n", stud1, stud2, stud3);
    return 0;
}

1. 0, 1, 2

2. 1, 2, 3

3. 0, 2, 1

4. 1, 3, 2

What will be the output of the program ?

#include<stdio.h>
int main()
{
    printf(5+"IndiaBIX\n");
    return 0;
}

1. Error

2. IndiaBIX

3. BIX

4. None of above

Which of the following is correct way to define the function fun() in the below program?

#include<stdio.h>
int main()
{
    int a[3][4];
    fun(a);
    return 0;
}

1. void fun(int p[][4])
   {
   }

2. void fun(int *p[4])
   {
   }

3. void fun(int *p[][4])
   {
   }

4. void fun(int *p[3][4])
   {
   }

What will be the output of the program if the array begins 1200 in memory?

#include<stdio.h>
int main()
{
    int arr[]={2, 3, 4, 1, 6};
    printf("%u, %u, %u\n", arr, &arr[0], &arr);
    return 0;
}

1. 1200, 1202, 1204

2. 1200, 1200, 1200

3. 1200, 1204, 1208

4. 1200, 1202, 1200

What will be the output of the program ?

#include<stdio.h>
int main()
{
    int i, a[] = {2, 4, 6, 8, 10};
    change(a, 5);
    for(i=0; i<=4; i++)
        printf("%d, ", a[i]);
    return 0;
}
void change(int *b, int n)
{
    int i;
    for(i=0; i<n; i++)
        *(b+1) = *(b+i)+5;
}

1. 7, 9, 11, 13, 15

2. 2, 15, 6, 8, 10

3. 2 4 6 8 10

4. 3, 1, -1, -3, -5

What will be the output of the program?

#include<stdio.h>
#include<stdlib.h>
int main()
{
    int i=0;
    i++;
    if(i<=5)
    {
        printf("IndiaBIX");
        exit(1);
        main();
    }
    return 0;
}

1. Prints "IndiaBIX" 5 times

2. Function main() doesn't calls itself

3. Infinite loop

4. Prints "IndiaBIx"

Will the printf() statement print the same values for any values of a?

#include<stdio.h>
int main()
{
    float a;
    scanf("%f", &a);
    printf("%f\n", a+a+a);
    printf("%f\n", 3*a);
    return 0;
}

1. Yes

2. No

Which of the following range is a valid long double (Turbo C in 16 bit DOS OS) ?

1. 3.4E-4932 to 1.1E+4932

2. 3.4E-4932 to 3.4E+4932

3. 1.1E-4932 to 1.1E+4932

4. 1.7E-4932 to 1.7E+4932

Which of the following is the correct order of evaluation for the below expression?
z = x + y * z / 4 % 2 - 1

1. * / % + - =

2. = * / % + -

3. / * % - + =

4. * % / - + =

What will be the output of the program?

#include<stdio.h>
int main()
{
    int x=1, y=1;
    for(; y; printf("%d %d\n", x, y))
    {
        y = x++ <= 5;
    }
    printf("\n");
    return 0;
}

1. 2 1
   3 1
   4 1
   5 1
   6 1
   7 0

2. 2 1
   3 1
   4 1
   5 1
   6 1

3. 2 1
   3 1
   4 1
   5 1

4. 2 2
   3 3
   4 4
   5 5

What will be the output of the program under DOS?

#include<stdio.h>
int main()
{
    char huge *near *far *ptr1;
    char near *far *huge *ptr2;
    char far *huge *near *ptr3;
    printf("%d, %d, %d\n", sizeof(ptr1), sizeof(**ptr2), sizeof(ptr3));
    return 0;
}

1. 4, 4, 4

2. 4, 2, 2

3. 2, 8, 4

4. 2, 4, 8

What do the following declaration signify?

int *f();

1. f is a pointer variable of function type.

2. f is a function returning pointer to an int.

3. f is a function pointer.

4. f is a simple declaration of pointer variable.

Bitwise | can be used to multiply a number by powers of 2.

1. Yes

2. No

In Turbo C/C++ under DOS if we want that any wild card characters in the command-line arguments should be appropriately expanded, are we required to make any special provision?

1. Yes

2. No

What will be the output of the program (sample.c) given below if it is executed from the command line (Turbo C in DOS)?
cmd> sample 1 2 3

/* sample.c */
#include<stdio.h>
int main(int argc, char *argv[])
{
    int j;
    j = argv[1] + argv[2] + argv[3];
    printf("%d", j);
    return 0;
}

1. 6

2. sample 6

3. Error

4. Garbage value

On executing the below program what will be the contents of 'target.txt' file if the source file contains a line "To err is human"?

#include<stdio.h>
int main()
{
    int i, fss;
    char ch, source[20] = "source.txt", target[20]="target.txt", t;
    FILE *fs, *ft;
    fs = fopen(source, "r");
    ft = fopen(target, "w");
    while(1)
    {
        ch=getc(fs);
        if(ch==EOF)
            break;
        else
        {
            fseek(fs, 4L, SEEK_CUR);
            fputc(ch, ft);
        }
    }
    return 0;
}

1. r n

2. Trh

3. err

4. None of above