Flyweight pattern in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the Flyweight interface method.

LLD

class Flyweight:
    def [1](self, extrinsic_state):
        pass

Drag options to blanks, or click blank then click option'

Aupdate

Boperation

Cdelete

Dcreate

Attempts:

3 left

💡 Hint

Common Mistakes

Using constructor or unrelated method names instead of 'operation'.

The Flyweight interface defines an operation method that accepts extrinsic state.

2fill in blank

medium

Complete the code to implement intrinsic state storage in the ConcreteFlyweight class.

LLD

class ConcreteFlyweight(Flyweight):
    def __init__(self, [1]):
        self.intrinsic_state = intrinsic_state

Drag options to blanks, or click blank then click option'

Astate

Bcontext

Cextrinsic_state

Dintrinsic_state

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing intrinsic and extrinsic state in constructor parameters.

The constructor takes intrinsic_state which is stored internally and shared.

3fill in blank

hard

Fix the error in the FlyweightFactory method to return existing flyweights or create new ones.

LLD

class FlyweightFactory:
    def __init__(self):
        self._flyweights = {}

    def get_flyweight(self, key):
        if key not in self._flyweights:
            self._flyweights[key] = ConcreteFlyweight([1])
        return self._flyweights[key]

Drag options to blanks, or click blank then click option'

Akey

Bself

CFlyweight

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Passing incorrect parameters like self or None to the constructor.

The factory uses the key as intrinsic state to create or retrieve flyweights.

4fill in blank

hard

Fill both blanks to complete the operation method using intrinsic and extrinsic state.

LLD

class ConcreteFlyweight(Flyweight):
    def __init__(self, intrinsic_state):
        self.intrinsic_state = intrinsic_state

    def operation(self, [1]):
        print(f"Intrinsic: {self.intrinsic_state}, Extrinsic: { [2] }")

Drag options to blanks, or click blank then click option'

Aextrinsic_state

Bintrinsic_state

Cstate

Dcontext

Attempts:

3 left

💡 Hint

Common Mistakes

Using intrinsic_state as parameter or in print instead of extrinsic_state.

The operation method takes extrinsic_state as parameter and uses it in the print statement.

5fill in blank

hard

Fill all three blanks to create a flyweight factory, get flyweights, and perform operations with extrinsic state.

LLD

factory = FlyweightFactory()
flyweight1 = factory.get_flyweight([1])
flyweight2 = factory.get_flyweight([2])
flyweight1.operation([3])

Drag options to blanks, or click blank then click option'

A"A"

B"B"

C"extrinsic1"

D"extrinsic2"

Attempts:

3 left

💡 Hint

Common Mistakes

Using extrinsic state as keys or vice versa.

The factory creates flyweights with keys "A" and "B". The operation uses extrinsic state "extrinsic1".