Piece movement rules (polymorphism) in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare the base class method for movement.

LLD

class Piece {
    public void [1]() {
        // base movement logic
    }
}

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Arun

Bmove

Cjump

Dwalk

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated method names like 'run' or 'jump' which do not fit the context.

The base class method for piece movement is conventionally named 'move' to represent the action.

2fill in blank

medium

Complete the code to override the move method in a subclass.

LLD

class Knight extends Piece {
    @Override
    public void [1]() {
        // knight specific movement
    }
}

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Ajump

Bwalk

Crun

Dmove

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different method name which does not override the base method.

The subclass overrides the base class method 'move' to provide specific movement rules.

3fill in blank

hard

Fix the error in the method signature to correctly override the base method.

LLD

class Bishop extends Piece {
    public void [1]() {
        // bishop movement logic
    }
}

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Amove

BmoveTo

CmovePieceTo

DmovePiece

Attempts:

3 left

💡 Hint

Common Mistakes

Changing the method name breaks overriding and polymorphism.

To override correctly, the method name must be 'move' matching the base class method.

4fill in blank

hard

Fill both blanks to define an abstract base class and abstract move method.

LLD

abstract class Piece {
    public abstract void [1]();
}

class Queen extends Piece {
    @Override
    public void [2]() {
        // queen movement logic
    }
}

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Amove

Brun

Cjump

Dwalk

Attempts:

3 left

💡 Hint

Common Mistakes

Using different method names breaks the abstract method contract.

The abstract method and its override must have the same name 'move' to enforce polymorphism.

5fill in blank

hard

Fill all three blanks to implement polymorphic move calls for different pieces.

LLD

Piece p1 = new [1]();
Piece p2 = new [2]();
p1.[3]();
p2.move();

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AKnight

BBishop

Cmove

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect class names or method names breaks polymorphism.

Create instances of Knight and Bishop, then call the polymorphic 'move' method on each.