In C++, which container does std::stack use by default for its underlying implementation?std::vectorstd::liststd::dequestd::array

Which of the following statements is true regarding std::stack in C++?It is a dynamically resizing arrayIt is a container adapterIt allows random access to elementsIt supports concurrent access

Which data structure does a stack use internally?ArrayLinked ListBoth Array and Linked ListNone of the above

In C++, which STL container is implemented as a doubly-linked list?Group of answer choicesvectormaplistdeque

17. What is the role of the top variable in a stack implementation?a. It stores the value to be pushed.b. It tracks the most recently added element.c. It points to the bottom of the stack.d. It manages the display operation.18. What is a potential limitation of array-based stacks?a. Limited by the fixed size of the arrayb. Can lead to stack overflowc. Offers dynamic sizingd. Requires additional memory for pointers19. In the C++ code for pushing elements onto a stack, what is stack[top] = x; doing?a. Removing the top elementb. Initializing the stackc. Adding an element to the stackd. Checking if the stack is full20. In the C++ code for displaying elements in a stack, what does the loop for(i = top; i >= 0; i--)do?a. Adds elements to the stackb. Removes elements from the stackc. Checks if the stack is emptyd. Displays elements in reverse order

What is the output of the following code snippet?std::stack<int> s;s.push(1);s.push(2);s.push(3);std::cout << s.size() << " " << s.top();3 13 22 33 3