After executing the following lines of instructions, what is the value of *p ?

int a = 3;
int b = 5;
int * p = &a;
a = b;

Assuming that the user enters the value -1, what will the following program display?

#include<stdio.h>
int main() {
    int a;
    scanf("%d", &a);
    if (a < 10)
        printf("a is less than 10\n");
        printf("a is greater than 10\n");
    return 0;
}

We want to write a swap_array function that swaps the values of the elements at indices i and j of an array t (we assume that i and j are valid indices). Among the following definitions, which one is the correct implementation of the swap function ?

After executing the following program, how many times is the string "hello" displayed?

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

Consider the following program. Among the following statements, which ones are true?

#include<stdio.h>
#define N 10
int main() {
    int t[] = {1, 1, 1, 1, 1, -1, -1, -1, -1, -1, -1};
    int l = 0, r = N - 1;
    int cpt = 0;
    while (l <= r) {
        cpt++;
        int m = l + (r - l) / 2;
        if (t[m] == 1) {
            l = m + 1;
        } else {
            r = m - 1;
        }
    }
    printf("%d %d\n", l, cpt);
    return 0;
}

Consider the following string char s[] = "abcde". Among the following statements, which ones are true?

What is the output of the following program?

#include<stdio.h>
int main() {
    int i = 0, j = 0;
    char str[10] = "abcdef";
    char str2[10];
    while (str[i] != '\0') {
        i++;
    }
    str2[i] = '\0';
    while (i >= 0) {
        str2[--i] = str[j++];
    }
    printf("%s\n", str2);
    return 0;
}

After executing the following instructions, what are the values of the variables str1 and str2 ?

char str1[100] = "abcd";
char str2[100] = "efgh!";
char * p1 = str1;
char * p2 = str2;
while (*p2 != '\0') p2++;
while (*p1 != '\0') *(p2++) = *(p1++);
*p2 = '\0';

We want to dynamically allocate space for a string of length n. Among the following statements, which one allows to achieve this?

The selection sort algorithm allows to sort an array in a certain order. Among the following statements, which one best describes this sorting algorithm?