During the infix to postfix conversion of the expression 'A+B*C-D/E', which operator would be pushed onto the stack first?
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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 entire stack is cleared.
The corresponding function call is pushed onto the stack.
The corresponding function call is popped from the stack.
In maze-solving algorithms, how does the use of a stack differ between depth-first search (DFS) and breadth-first search (BFS)?
BFS uses a stack to prioritize unexplored paths, while DFS uses a queue to systematically explore all directions.
Both DFS and BFS use stacks identically; the difference lies in how they mark visited nodes.
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.
DFS uses a stack only if the maze is solvable, while BFS always uses a queue.
In a stack implemented using a singly linked list, which end of the list typically represents the top of the stack?
Tail
Head
It can be either the head or the tail, depending on the implementation.
Middle
What key advantage does a Deque (Double-ended Queue) offer over a Stack?
Deque is more memory-efficient than a Stack.
Deque allows deletions only at one end.
Deque allows insertions and deletions at both ends.
Deque allows insertions only at one end.
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 dynamic array
Stack using a singly linked list
Stack using a fixed-size array
Stack using a doubly linked list
Consider the scenario of undoing actions in a text editor. Which data structure would be most suitable for implementing an 'undo' feature?
Linked List
Queue
Stack
Binary Tree
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.
Which type of linked list allows for more efficient push and pop operations at both ends, making it suitable for implementing a stack?
Doubly linked list
Circular linked list
Both singly and doubly linked lists are equally efficient.
Singly linked list
Which of the following operations is NOT typically associated with a Deque?
push (insert at the rear)
inject (insert at the front)
pop (remove from the rear)
peek (view the element at the front without removing)