[Solved] Find the error in this move validation snippet: def validate_knight_move(start, end): dx = abs(end[0] - start[0]) dy = abs(end[1] - start[1]) if dx == 2 and dy == 1 or dx == 1 and dy == 2:... | LLD

LLD - Design — Chess Game

Find the error in this move validation snippet:

def validate_knight_move(start, end):
    dx = abs(end[0] - start[0])
    dy = abs(end[1] - start[1])
    if dx == 2 and dy == 1 or dx == 1 and dy == 2:
        return True
    else:
        return False

AIncorrect calculation of dx and dy

BMissing return statement for invalid moves

COperator precedence causes incorrect evaluation

DUsing abs() instead of direct subtraction

Step-by-Step Solution

Solution:

Step 1: Analyze conditional expression
The condition lacks parentheses, so 'and' and 'or' operators may evaluate incorrectly.
Step 2: Understand operator precedence
Without parentheses, expression may be read as (dx == 2 and dy == 1) or (dx == 1) and (dy == 2), which is wrong.
Final Answer:
Operator precedence causes incorrect evaluation -> Option C
Quick Check:
Use parentheses to group conditions correctly [OK]

Quick Trick: Use parentheses to clarify complex conditions [OK]

Common Mistakes:

Ignoring operator precedence
Assuming 'and' binds tighter than 'or'
Missing parentheses in conditions

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Find the error in this move validation snippet:

Step 1: Analyze conditional expression

Step 2: Understand operator precedence

Final Answer:

Quick Check:

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