Which of the following best describes the correct order of internal state changes?
easy🧠🧾 Concept Trace Q12 of Q15
OOP & Design Patterns - Design Snake and Ladder Game - LLD End-to-End
Trace the sequence of events when a player rolls the dice and lands on a ladder in a well-designed Snake and Ladder game. Which of the following best describes the correct order of internal state changes?
APlayer rolls dice -> GameController calculates new position -> Board checks for ladder -> GameController updates Player position accordingly
BPlayer rolls dice -> Player position updated -> Board checks for ladder -> Player position updated again if ladder found
CPlayer rolls dice -> Board updates Player position directly if ladder found -> Player notified of new position
DPlayer rolls dice -> Dice notifies Board -> Board updates Player position -> GameController confirms move
Step-by-Step Solution
Step 1: Dice roll triggers GameController
Dice generates number; GameController uses it to calculate tentative position.
Step 2: Board checks for ladder or snake
GameController queries Board to see if new position has ladder or snake.
Step 3: GameController updates Player position
Based on Board's info, GameController updates Player's position accordingly.
Step 4: Player position is finalized
Player's position reflects ladder climb if applicable.
Final Answer:
Option A -> Option A
Quick Check:
Only GameController manages state changes; Board is queried but does not update Player directly.
Quick Trick:GameController mediates all state changes after dice roll [OK]
Common Mistakes:
MISTAKES
Assuming Player updates position before Board check
Believing Board directly updates Player position
Thinking Dice notifies Board
Trap Explanation:
PITFALL
Options where Player or Board update position directly ignore proper encapsulation and control flow.
Interviewer Note:
CONTEXT
Checks candidate's grasp of event flow and state management in OOP design.
Master "Design Snake and Ladder Game - LLD End-to-End" in OOP & Design Patterns
2 interactive learning modes - each teaches the same concept differently
