Complete Modern C++ - Dynamic Memory Allocation - Part IV (2D Arrays)

The video tutorial explains how to allocate memory for 2D arrays in C, both in stack and heap memory. It covers the syntax for accessing elements using row and column indices, and demonstrates how to create 2D arrays on the heap by representing each row as a 1D array. The tutorial also explains how to free the allocated memory using the delete operator, ensuring the number of delete calls matches the number of new calls. The session concludes with a reminder to practice the examples and a preview of the next topic on classes and objects.

How is a 2D array represented in memory?

• As a binary tree

• As a linked list

• As a contiguous 1D array

• As a 2D grid

What is the first step in creating a 2D array on the heap?

• Initialize all elements to zero

• Allocate memory for each row as a 1D array

• Use a single pointer for the entire array

• Allocate memory for a 2D grid

What type of pointer is used to manage rows in a heap-allocated 2D array?

• Circular pointer

• Single pointer

• Double pointer

• Triple pointer

How do you access an element in the first row and second column of a heap-allocated 2D array?

• Use a loop to iterate

• Use a pointer arithmetic

• Use a double index with row and column

• Use a single index

What must be done after using a heap-allocated 2D array?

• Convert it to a stack-allocated array

• Reallocate the memory

• Free the memory in reverse order of allocation

• Leave the memory as is

Why is it important to match the number of delete calls with new calls?

• To enhance readability

• To reduce code complexity

• To increase performance

• To prevent memory leaks

What is the final step in freeing a heap-allocated 2D array?

• Allocate more memory

• Convert it to a 1D array

• Reinitialize the array

• Delete the array of pointers