C Language Test 4

Which of the following is a valid variable name in C?

The expression x += 5; is equivalent to which of the following?

What is the output of the following C code?

#include 

int main() {
    int num = 7;
    if (num % 2 == 0) {
        printf("Even");
    } else {
        printf("Odd");
    }
    return 0;
}

What will be the output?

#include <stdio.h>

int main() {
    int i = 0;
    while (i < 3) {
        printf("Hi ");
        i++;
    }
    return 0;
}

Which of the following functions is an example of recursion?

How many elements does an array int arr[3][4]; contain?

If p is an integer pointer pointing to address 1000, what will p+1 point to (assuming 4-byte int)?

What will be printed?

#include <stdio.h>

union Data {
    int i;
    char c;
};

int main() {
    union Data d;
    d.i = 65;
    printf("%c", d.c);
    return 0;
}

What will this program do?

#include <stdio.h>

int main() {
    FILE *fp = fopen("test.txt", "w");
    fputc('Z', fp);
    fclose(fp);
    return 0;
}

Why is gets() considered unsafe in C?

Assuming a 32-bit system, what is the output of this code?

#include <stdio.h>

int main() {
    printf("%lu", sizeof(char));
    return 0;
}

What is the output of the following C code?

#include <stdio.h>

int main() {
    printf("%d", 10 + 5 * 2);
    return 0;
}

What is the output of the following C code?

#include 

int main() {
    int score = 85;
    if (score >= 90) {
        printf("A");
    } else if (score >= 80) {
        printf("B");
    } else {
        printf("C");
    }
    return 0;
}

If an outer loop runs 5 times and an inner loop runs 4 times, how many total iterations occur?

What is the output of the following code?

#include <stdio.h>

int fact(int n) {
    if (n == 0) return 1;
    return n * fact(n - 1);
}

int main() {
    printf("%d", fact(3));
    return 0;
}

What will be printed?

#include <stdio.h>

int main() {
    int arr[2][2] = {{1, 2}, {3, 4}};
    printf("%d", arr[1][0]);
    return 0;
}

What will be the output?

#include <stdio.h>

int main() {
    int x = 42;
    int *p = &x;
    int **q = &p;
    printf("%d", **q);
    return 0;
}

Which of the following is valid for nested structures?

What does EOF stand for in C file handling?

What will be printed?

#include <stdio.h>
#include <string.h>

int main() {
    char str1[10];
    strcpy(str1, "Code");
    printf("%s", str1);
    return 0;
}