Stacks In Data Structures - Study Mode
[#46] From the given expression tree, identify the infix expression, evaluate it and choose the correct result.
Correct Answer
(C) 12
[#47] Which stack operation is typically used to undo the most recent action in applications?
Correct Answer
(B) Pop
[#48] In a stack, what is the term used to describe the condition when elements are removed until it is empty?
Correct Answer
(B) Underflow
[#49] How would you implement a stack that supports minimum element retrieval in constant time?
Correct Answer
(A) Use an additional stack to keep track of minimums
[#50] Which of the following operations cannot be performed in O(1) time in a stack?
Correct Answer
(D) Search