In a stack implemented using a singly linked list, which end of the list typically represents the top of the stack?
Middle
Tail
It can be either the head or the tail, depending on the implementation.
Head
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
Increased time complexity for push and pop operations
Higher memory usage due to the overhead of storing pointers
What is the purpose of the 'top' pointer in an array-based stack implementation?
To store the value of the top element in the stack
To point to the bottom element of the stack
To track the index of the next available position for insertion
To store the maximum size of the stack
What is the time complexity of the 'peek' operation in a well-implemented stack?
O(1)
O(log n)
O(n)
O(n log n)
In postfix evaluation, what action is taken when an operand is encountered?
It is pushed onto the stack.
It is ignored.
It is immediately evaluated.
It triggers the evaluation of operators on the stack.
Which type of linked list allows for more efficient push and pop operations at both ends, making it suitable for implementing a stack?
Circular linked list
Both singly and doubly linked lists are equally efficient.
Doubly linked list
Singly linked list
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?
Inability to handle stacks larger than the predetermined size
Complex implementation requiring advanced pointer manipulation
Higher memory usage compared to dynamic arrays
In a linked list-based stack implementation, what does the 'isEmpty()' operation typically check?
If the stack contains any elements with a value of zero
If the tail pointer is pointing to NULL
If the head pointer is pointing to NULL
If the stack has reached its maximum capacity
What is the result of evaluating the prefix expression '-+5*234'?
-7
7
17
-17