In postfix evaluation, what action is taken when an operand is encountered?
It is ignored.
It is pushed onto the stack.
It is immediately evaluated.
It triggers the evaluation of operators on the stack.
What is a potential drawback of using a linked list-based stack compared to an array-based stack?
Increased time complexity for push and pop operations
Inability to handle dynamic resizing
Limited stack size
Higher memory usage due to the overhead of storing pointers
Imagine a stack is used to track function calls in a recursive program. What happens to the stack when a function returns?
The stack remains unchanged.
The corresponding function call is popped from the stack.
The entire stack is cleared.
The corresponding function call is pushed onto the stack.
In a linked list-based stack implementation, what does the 'isEmpty()' operation typically check?
If the stack has reached its maximum capacity
If the tail pointer is pointing to NULL
If the head pointer is pointing to NULL
If the stack contains any elements with a value of zero
Which of the following operations is NOT typically associated with a Deque?
inject (insert at the front)
push (insert at the rear)
pop (remove from the rear)
peek (view the element at the front without removing)
You need to implement a stack that can store a large number of items and the maximum number of items is unknown. Which implementation would be more suitable?
Stack using a singly linked list
Stack using a doubly linked list
Stack using a fixed-size array
Stack using a dynamic array
If you represent an arithmetic expression in postfix notation using a stack, what operation would you perform when encountering an operand (a number)?
Ignore the operand.
Pop the top two elements from the stack, perform the operation, and push the result back onto the stack.
Push the operand onto the stack.
Check if the stack is empty.
What key advantage does a Deque (Double-ended Queue) offer over a Stack?
Deque allows insertions and deletions at both ends.
Deque allows deletions only at one end.
Deque allows insertions only at one end.
Deque is more memory-efficient than a Stack.
What is the primary disadvantage of implementing a stack using a fixed-size array?
Inability to handle stacks larger than the predetermined size
Complex implementation requiring advanced pointer manipulation
Higher memory usage compared to dynamic arrays
In maze-solving algorithms, how does the use of a stack differ between depth-first search (DFS) and breadth-first search (BFS)?
DFS uses a stack to explore as deeply as possible before backtracking, while BFS uses a queue to explore all neighbors at a given level.
BFS uses a stack to prioritize unexplored paths, while DFS uses a queue to systematically explore all directions.
DFS uses a stack only if the maze is solvable, while BFS always uses a queue.
Both DFS and BFS use stacks identically; the difference lies in how they mark visited nodes.