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
Question
- 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
Solution
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The role of the top variable in a stack implementation is b. It tracks the most recently added element. The top variable in a stack always points to the most recently added element.
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A potential limitation of array-based stacks is a. Limited by the fixed size of the array and b. Can lead to stack overflow. Unlike linked list implementation of stack, array-based stacks have a fixed size, which can lead to stack overflow if more elements are added than the array can hold.
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In the C++ code for pushing elements onto a stack, stack[top] = x; is c. Adding an element to the stack. This line of code is assigning the value of x to the position in the stack pointed to by the top variable, effectively adding a new element to the stack.
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In the C++ code for displaying elements in a stack, the loop for(i = top; i >= 0; i--) d. Displays elements in reverse order. This loop starts at the top of the stack and iterates down to the bottom, displaying each element in turn. Since the top of the stack is the most recently added element, this displays the elements in reverse order of addition.
Similar Questions
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