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
Question
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
Solution
The true statement regarding std::stack in C++ is: "It is a container adapter".
Here's why:
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"It is a dynamically resizing array": This statement is false. std::stack in C++ is not a dynamically resizing array. It is a container adapter that uses an encapsulated object of a specific container class as its underlying container, providing a specific set of member functions to access its elements.
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"It is a container adapter": This statement is true. std::stack is a container adapter, which means it uses another container to manage its elements. It provides a specific set of member functions to access its elements, which are added and retrieved according to the LIFO (Last In First Out) principle.
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"It allows random access to elements": This statement is false. std::stack does not allow random access to its elements. It only allows access to the top element, which is the last element inserted into the stack.
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"It supports concurrent access": This statement is false. std::stack does not support concurrent access. If you need to access a std::stack from multiple threads, you will need to manage the access yourself (for example, by using locks).
Similar Questions
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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
1. True or False: In a stack implemented using an array, the size of the stack is fixed, andelements can only be added or removed from the top of the stack.2. True or False: A stack implemented with a linked list can dynamically adjust its size toaccommodate an arbitrary number of elements.3. True or False: In a linked list-based stack, the last element added is the first element to beremoved (LIFO), similar to an array-based stack.4. True or False: The primary advantage of implementing a stack using a linked list is theelimination of memory wastage associated with a fixed-size array.5. True or False: When implementing a stack using a linked list, a pop operation involvesdeleting the element at the end of the linked list, opposite to a push operation, whichinserts a new element at the beginning.
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