Design a stack that supports getMin() in O(1) time and O(1) extra space — DSA Technical Interview Questions & Answers

Design a stack that supports getMin() in O(1) time and O(1) extra space

Design a stack that supports getMin() in O(1) time and O(1) extra space

  • Design a stack that supports getMin() in O(1) time and O(1) extra space is a DSA topic. In plain words you use it for undo typing in a tiny editor. Don’t start with a slogan — start with that picture.
  • Smallest example: push / pop LIFO. Type it, run it, and say what you see. If you can do that from memory, you know Design a stack that supports getMin() in O(1) time and O(1) extra space.
  • From the example next to this theory: Design a stack that supports getMin() in O(1) time and O(1) extra space — stack is LIFO: push/pop from the same end.
  • Trap: pop on empty. Fix that before you talk about advanced DSA.
  • Viva: what is Design a stack that supports getMin() in O(1) time and O(1) extra space? Then show push / pop LIFO. Then name the trap.

Technical Interview Tip: What is Design a stack that supports getMin() in O(1) time and O(1) extra space? Show this: push / pop LIFO. Trap: pop on empty.

Code Examples for Design a stack that supports getMin() in O(1) time and O(1) extra space

Design a stack that supports getMin() in O(1) time and O(1) extra space — working example

stack = []
stack.append(10)   # push
stack.append(20)
print(stack.pop()) # 20
print(stack[-1])   # peek → 10

Design a stack that supports getMin() in O(1) time and O(1) extra space — stack is LIFO: push/pop from the same end.

How to Explain Design a stack that supports getMin() in O(1) time and O(1) extra space to an Interviewer

What is Design a stack that supports getMin() in O(1) time and O(1) extra space?

Used for undo typing a tiny editor Not just the heading

Give one small example of Design a stack that supports getMin() in O(1) time and O(1) extra space.

push / pop LIFO Design a stack that supports getMin() in O(1) time and O(1) extra space — stack is LIFO: push/pop from the same end

What mistake do beginners make with Design a stack that supports getMin() in O(1) time and O(1) extra space?

pop on empty Show the fix

Where do you use Design a stack that supports getMin() in O(1) time and O(1) extra space?

a tiny editor undo typing