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CS 141-G2 - Data structures & algorithms - Spring 2025

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What will be the output of the following code?

#include <stdio.h>

#include <stdlib.h>

int main() {

    int *arr = (int *)malloc(5 * sizeof(int));

    for (int i = 0; i < 5; i++) {

        *(arr + i) = i * 2;

    }

    printf("%d\n", arr[3]);

    free(arr);

    return 0;

}

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What is the output of the following code?

#include <stdio.h>

int main() {

    int x = 10, y = 20;

    int *p = &x, *q = &y;

    *p = *q;

    printf("%d %d\n", x, y);

    return 0;

}

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 What is the correct syntax for defining a struct in C?

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What does the following pointer declaration mean? c Copier Modifier

int *ptr;

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How do you correctly access a member of a struct using a pointer?

struct Student {

    int id;

    float grade;

};

struct Student *ptr;

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What is the correct way to allocate memory for an integer array dynamically?

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How many times will the loop execute? 

for(int i = 0; i < 5; i += 2) {

    printf("%d ", i);

}

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What will be the output of the following code? 

#include <stdio.h>

int main() {

    int x = 5;

    if (x = 0) 

        printf("Zero\n");

    else 

        printf("Non-Zero\n");

    return 0;

}

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Which of the following correctly declares and initializes a pointer?

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What will be the output of the following while loop? c Copier Modifier

#include <stdio.h>

int main() {

    int i = 3;

    while (i--) {

        printf("%d ", i);

    }

    return 0;

}

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