Product, Cart, Order classes in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a Product class with a constructor.

LLD

class Product:
    def __init__(self, id, name, price):
        self.id = id
        self.name = name
        self.price = [1]

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

Acost

Bprice

Cid

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong variable name like 'cost' or 'name' instead of 'price'.

The constructor assigns the price parameter to the instance variable self.price.

2fill in blank

medium

Complete the code to add a product to the Cart's items list.

LLD

class Cart:
    def __init__(self):
        self.items = []
    def add_product(self, product):
        self.items.[1](product)

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

Aappend

Bremove

Cpop

Dclear

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'remove' or 'pop' which remove items instead of adding.

To add an item to a list in Python, use the append method.

3fill in blank

hard

Fix the error in the Order class constructor to correctly assign the cart parameter.

LLD

class Order:
    def __init__(self, order_id, cart):
        self.order_id = order_id
        self.cart = [1]

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

Acart

Border_id

Cself.cart

Dorder

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning 'order_id' or 'self.cart' instead of the parameter 'cart'.

The constructor should assign the passed cart parameter to the instance variable self.cart.

4fill in blank

hard

Fill both blanks to create a method that calculates the total price of items in the cart.

LLD

class Cart:
    def __init__(self):
        self.items = []
    def total_price(self):
        return sum(item.[1] for item in self.[2])

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

Aprice

Bname

Citems

Did

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'name' or 'id' instead of 'price' for summing.

The method sums the price attribute of each item in the items list.

5fill in blank

hard

Fill all three blanks to create an Order method that returns a dictionary of product names and their quantities.

LLD

class Order:
    def __init__(self, order_id, cart):
        self.order_id = order_id
        self.cart = cart
    def product_quantities(self):
        quantities = {}
        for item in self.cart.[1]:
            name = item.[2]
            quantities[name] = quantities.get(name, 0) + [3]
        return quantities

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

Aitems

Bname

C1

Dprice

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'price' instead of 'name' as key or incrementing by price instead of 1.

The method loops over items in the cart, uses the product name as key, and increments the count by 1.