C Language Test 5

The long data type modifier is used to:

What is the value of the expression !0?

What is the output of the following C code?

#include 

int main() {
    int a = 5, b = 10;
    if (a < b) {
        if (a == 5) {
            printf("Correct");
        }
    } else {
        printf("Incorrect");
    }
    return 0;
}

Which of these will create an infinite loop?

Which header file must be included to use sqrt() function?

Which of the following is the correct declaration of a string in C?

When does a dangling pointer occur in C?

Which statement is true?

What does this code do?

#include <stdio.h>

struct Data { int x; float y; };

int main() {
    struct Data d;
    FILE *fp = fopen("bin.dat", "rb");
    fread(&d, sizeof(d), 1, fp);
    fclose(fp);
    return 0;
}

Which of the following is a string constant in C?

What is the output of the following code?

#include <stdio.h>
#define PI 3.14

int main() {
    printf("%f", PI * 2);
    return 0;
}

What is the output of the following C code?

#include <stdio.h>

int main() {
    int age = 20;
    printf("%s", (age >= 18) ? "Adult" : "Minor");
    return 0;
}

What is the output of the following C code?

#include 

int main() {
    int temp = 25;
    if (temp > 20 && temp < 30) {
        printf("Pleasant");
    } else {
        printf("Extreme");
    }
    return 0;
}

Which loop is best suited when the number of iterations is known in advance?

What is true about a void function in C?

If int arr[10]; and sizeof(int) = 4, what will sizeof(arr) return?

Which is the correct syntax to declare a pointer to a function that takes int as argument and returns int?

What will sizeof return?

#include <stdio.h>

union U {
    int a;
    double b;
    char c;
};

int main() {
    printf("%zu", sizeof(union U));
    return 0;
}

Why should fclose() always be used after file operations?

Which standard library function is used to find the first occurrence of a character in a string?