What will do the below code snippet? C++ #include <iostream> using namespace std; int main() { int m = 3, n = 4, c = 0; int* arr = new int[m * n]; for (int i = 0; i < m; i++) { for (int j = 0; j < n; j++) { *(arr + i * n + j) = ++c; } } return 0; }

#include <iostream>
using namespace std;

int main() {

    int arr[3][2] ={{1,2,3},{4,5,6},{7,8,9}};
     for(int i=0;i<3;i++)
       for(int j=0;j<3;j++)
         cout<<arr[i][j]<<endl;
    return 0;
}

A
arr[i][j] is is not declared
B
there are no any braces used inside for loop
C
We have declared an array of 3 rows and 2 columns, but assigned value to 3 rows and 3 columns.
D
None

Question 2

What is the size of int arr[15]; if we assume that int is 4 bytes?

A
15
B
11
C
12
D
60

Question 3

When does the ArrayIndexOutOfBoundsException occur?

A
Compile time
B
Run time
C
Not an Exception
D
None

Question 4

The first Index of the array typically starts from -----

A
-1
B
1
C
0
D
None

Question 5

When the array has free unused memory, which method can be used to free up the extra memory?

A
free()
B
shrinkSize()
C
growSize()
D
None

Question 6

Which method is used to access elements in an array?

A
Sequential
B
Random
C
Logarithmic
D
Alternative

Question 7

What is the time complexity for inserting/deleting at the beginning of the array?

A
O(1)
B
O(logN)
C
O(NlogN)
D
O(N)

Question 8

What will do the below code snippet?

C++

#include <iostream>
using namespace std;

int main()
{
    int m = 3, n = 4, c = 0;

    int* arr = new int[m * n];

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

            *(arr + i * n + j) = ++c;
        }
    }

    return 0;
}

A
It will create a 1d array and assign value to it.
B
It will create a 1d array of size m*n and assign value to it.
C
It will create a 1d dynamic array and assign value to it.
D
It will create a dynamic 2d array and assign value to it.

Question 9

In C++, we can create a dynamic array using the ______keyword.

A
array
B
this
C
super
D
new

Question 10

How can we create a dynamic array in C?

A
vector( )
B
dynamic_array( )
C
malloc()
D
None

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