Milking Minds 2 17-01-24

What is the time complexity of the following code snippet in C?

#include <stdio.h>

#include <string.h>

void solve() {

char s[] = "scaler";

int n = strlen(s);

for (int i = 0; i < n; i++) {

s[n + i] = s[i];

}

s[n * 2] = '\0'; // Adding null terminator to form a valid string

printf("%s\n", s);

}

int main() {

solve();

return 0;

}

• O(n)

• O(n^2)

• O(1)

• O(log n)

What happens if the following C statement is compiled and executed?

#include <stdlib.h>

int main() {

int *ptr = NULL;

free(ptr);

return 0; }

• The program is not semantically correct

• The program is compiled and executed successfully

• The program gives a compile-time error

• The program compiled successfully but throws an error during run-time

What is the purpose of the following C code?

#include <stdio.h>

int main() {

int i, n = 5;

for (i = 0; i <= n; i++) {

printf("Hello, World!\n");

}

return 0;

}

• To print 'Hello, World!' 5 times

• To print 'Hello, World!' 6 times

• To print 'Hello, World!' 4 times

• To print 'Hello, World!' n times

Consider the following Python code

def mystery_function(n):

result = 0

for i in range(1, n + 1):

result += i * i

return result

x = mystery_function(4)

What will be the output of the code?

• 14

• 30

• 1

• 20

Consider the following Python code snippet:

def mysterious_function(n):

return n if n <= 0 else (n % 10) + mysterious_function(n // 10)

result = mysterious_function(987654321)

print(result)

What will be the output of the code?

• 45

• 36

• 55

• 45 followed by an error

Consider the following Python code:

def calculate_average(nums):

try:

total = sum(nums)

average = total / len(nums)

return average

except ZeroDivisionError:

return "Cannot calculate average for an empty list"

except TypeError:

return "Invalid data type in the list"

except Exception as e:

return f"An unexpected error occurred: {e}"

result = calculate_average([1, 2, 3, '4', 5])

print(result)

What will be the output of the code?

• 3.0

• TypeError: Invalid data type in the list

• An unexpected error occurred: unsupported operand type(s) for +: 'int' and 'str'

• Cannot calculate average for an empty list

Consider the following Python code:

def mysterious_list_operations(lst):

return [i for i in range(len(lst)) if lst.pop(0) % 2 == 0]

original_list = [1, 2, 3, 4, 5, 6]

result = mysterious_list_operations(original_list.copy())

print(result)

What will be the output of the code?

• [0, 1, 2]

• [1, 3, 5]

• [2, 4, 6]

• [3, 2, 1]

Consider the following C code:

#include <stdio.h>

int main() {

int arr[] = {1, 2, 3, 4, 5};

int *ptr = arr;

int result = 0;

for (int i = 0; i < sizeof(arr) / sizeof(arr[0]); i++) {

result += *ptr++;

}

printf("%d\n", result);

return 0;

}

What will be the output of the code?

• 1

• 15

• Compilation Error

• Undefined Behavior

Consider the following C code:

#include <stdio.h>

void mystery_function(int n, int m) {

for (int i = 1; i <= n; i++) {

for (int j = 1; j <= m; j++) {

printf("%d ", (i + j) % 2 == 0 ? i j : (i - j) (i + j));

}

printf("\n");

}

}

int main() {

mystery_function(3, 4);

return 0;

}

What will be the output of the code?

• 1 2 3 4

  2 1 6 1

  3 6 9 4

• 1 2 3

  2 1 6

  3 6 9

  4 1 12

• 1 2 3

  2 1 6

  3 6 9

• 1 2 3 4

  2 1 6 1

Consider The following C Code:

#include <stdio.h>

void swap(int a, int b) {

a = a + *b;

b = a - *b;

a = a - *b;

}

int main() {

int x = 5, y = 10;

swap(&x, &y);

printf("x: %d, y: %d\n", x, y);

return 0;

}

What will be the output of the code?

• x: 10, y: 5

• x: 5, y: 10

• x: 0, y: 10

• x: 5, y: 0