C Language Test 2

Which of the following data types is used to store a single character and occupies 1 byte of memory?

What is the result of the expression 20 % 6?

The switch statement is best suited for scenarios where you need to:

What is the key difference between a while and a do-while loop?

Where is a function prototype (declaration) usually placed in a C program?

Which of the following correctly initializes an array in C?

What will be the output of this program?

#include <stdio.h>

int main() {
    int x = 10;
    int *p = &x;
    printf("%d", *p);
    return 0;
}

What will be the output?

#include <stdio.h>

struct Point {
    int x, y;
};

int main() {
    struct Point p = {10, 20};
    printf("%d %d", p.x, p.y);
    return 0;
}

What will this program print if data.txt does not exist?

#include <stdio.h>

int main() {
    FILE *fp;
    fp = fopen("data.txt", "r");
    if (fp == NULL)
        printf("File not found");
    else
        printf("File opened");
    return 0;
}

If char str[] = "C Language";, what will strlen(str) return?

What will be the output of the following C code snippet?

#include <stdio.h>

int main() {
    int num = 'C';
    printf("%d", num);
    return 0;
}

What is the output of the following C code?

#include <stdio.h>

int main() {
    int a = 10;
    int b = 5;
    printf("%d", (a > 5) && (b < 10));
    return 0;
}

What is the main purpose of the break keyword inside a switch statement?

What does the break statement do inside a loop?

What does a function return if its return type is not specified in C (default)?

What will the following code print?

#include <stdio.h>

int main() {
    int arr[3] = {10, 20, 30};
    printf("%d", arr[1]);
    return 0;
}

What will be printed?

#include <stdio.h>

int main() {
    int a = 5, b = 20;
    int *p = &a;
    p = &b;
    printf("%d", *p);
    return 0;
}

What will be printed?

#include <stdio.h>

struct Student {
    int id;
};

int main() {
    struct Student s = {101};
    struct Student *p = &s;
    printf("%d", p->id);
    return 0;
}

What will this program do?

#include <stdio.h>

int main() {
    FILE *fp = fopen("out.txt", "w");
    fprintf(fp, "Hello C");
    fclose(fp);
    return 0;
}

What will this program print?

#include <stdio.h>

int main() {
    char str[] = "Hello";
    puts(str);
    return 0;
}