C Language quiz questions

Point out the error in the program?

#include<stdio.h>
int main()
{
    FILE *fp;
    fp=fopen("trial", "r");
    fseek(fp, "20", SEEK_SET);
    fclose(fp);
    return 0;
}

1. Error: unrecognised Keyword SEEK_SET

2. Error: fseek() long offset value

3. No error

4. None of above

If the size of pointer is 4 bytes then What will be the output of the program ?

#include<stdio.h>
int main()
{
    char *str[] = {"Frogs", "Do", "Not", "Die", "They", "Croak!"};
    printf("%d, %d", sizeof(str), strlen(str[0]));
    return 0;
}

1. 22, 4

2. 25, 5

3. 24, 5

4. 20, 2

What will be the output of the program ?

#include<stdio.h>
int main()
{
    char str = "IndiaBIX";
    printf("%s\n", str);
    return 0;
}

1. Error

2. IndiaBIX

3. Base address of str

4. No output

What will be the output of the program ?

#include<stdio.h>
int main()
{
    char str1[] = "Hello";
    char str2[10];
    char *t, *s;
    s = str1;
    t = str2;
    while(*t=*s)
        *t++ = *s++;
    printf("%s\n", str2);
    return 0;
}

1. Hello

2. HelloHello

3. ello

4. No output

Which of the following function sets first n characters of a string to a given character?

1. strinit()

2. strnset()

3. strset()

4. strcset()

A header file contains macros, structure declaration and function prototypes.

1. True

2. False

In a macro call the control is passed to the macro.

1. True

2. False

A macro must always be defined in capital letters.

1. True

2. False

Is it true that too many recursive calls may result into stack overflow?

1. Yes

2. No

What will be the output of the program?

#include<stdio.h>
#include<math.h>
int main()
{
    printf("%f\n", sqrt(36.0));
    return 0;
}

1. 6.0

2. 6

3. 6.000000

4. Error: Prototype sqrt() not found.

Can we use a switch statement to switch on strings?

1. Yes

2. No

Which of the following statements are correct about an if-else statements in a C-program?

1. 1 and 2

2. 2 and 3

3. 1, 2 and 4

4. 2, 3, 4

What will be the output of the program?

#include<stdio.h>
int main()
{
    float a = 0.7;
    if(0.7 > a)
        printf("Hi\n");
    else
        printf("Hello\n");
    return 0;
}

1. Hi

2. Hello

3. Hi Hello

4. None of above

What will be the output of the program, if a short int is 2 bytes wide?

#include<stdio.h>
int main()
{
    short int i = 0;
    for(i<=5 && i>=-1; ++i; i>0)
        printf("%u,", i);
    return 0;
}

1. 1 ... 65535

2. Expression syntax error

3. No output

4. 0, 1, 2, 3, 4, 5

What is the purpose of fflush() function.

1. flushes all streams and specified streams.

2. flushes only specified stream.

3. flushes input/output buffer.

4. flushes file buffer.

Are the following declarations same?

char far *far *scr;
char far far** scr;

1. Yes

2. No

We can allocate a 2-Dimensional array dynamically.

1. True

2. False

In a function that receives variable number of arguments the fixed arguments passed to the function can be at the end of argument list.

1. True

2. False

If malloc() successfully allocates memory it returns the number of bytes it has allocated.

1. True

2. False

Which header file should be included to use functions like malloc() and calloc()?

1. memory.h

2. stdlib.h

3. string.h

4. dos.h