During the infix to postfix conversion of the expression 'A+B*C-D/E', which operator would be pushed onto the stack first?
/
What is the primary disadvantage of implementing a stack using a fixed-size array?
Higher memory usage compared to dynamic arrays
Complex implementation requiring advanced pointer manipulation
Inability to handle stacks larger than the predetermined size
Increased time complexity for push and pop operations
Imagine a stack is used to track function calls in a recursive program. What happens to the stack when a function returns?
The corresponding function call is popped from the stack.
The entire stack is cleared.
The corresponding function call is pushed onto the stack.
The stack remains unchanged.
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.
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.
Both DFS and BFS use stacks identically; the difference lies in how they mark visited nodes.
DFS uses a stack only if the maze is solvable, while BFS always uses a queue.
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
What is a potential drawback of using a linked list-based stack compared to an array-based stack?
Inability to handle dynamic resizing
Limited stack size
Higher memory usage due to the overhead of storing pointers
What is the primary difference between 'pop' and 'peek' operations on a stack?
'Pop' removes the top element, while 'peek' only retrieves its value without removing it.
'Pop' is used for stacks, while 'peek' is used for queues.
'Pop' retrieves the top element's value, while 'peek' removes it from the stack.
'Pop' and 'peek' are interchangeable terms for the same operation.
What is the result of evaluating the prefix expression '-+5*234'?
7
17
-7
-17
In a stack implemented using a linked list, where does the 'push' operation add the new element?
At the end of the linked list.
At the beginning of the linked list.
At a specific index in the linked list.
It depends on the data being inserted.
Which of the following stack operations has a time complexity of O(1) in both array-based and linked list-based implementations?
Peek
Pop
Push
All of the above