[Solved] What will be the output of this code?class Hotel: def __init__(self): self.rooms = [] def add_room(self, room): self.rooms.append(room) hotel = Hotel() room1 = 'Room101' hotel.... | LLD

LLD - Design — Hotel Booking System

What will be the output of this code?

class Hotel:
    def __init__(self):
        self.rooms = []
    def add_room(self, room):
        self.rooms.append(room)

hotel = Hotel()
room1 = 'Room101'
hotel.add_room(room1)
print(len(hotel.rooms))

A0

B1

CError

DNone

Step-by-Step Solution

Solution:

Step 1: Understand Hotel initialization
Hotel starts with an empty list rooms.
Step 2: Add room1 to rooms list
room1 string is appended to rooms list.
Step 3: Print length of rooms list
Length is 1 because one item was added.
Final Answer:
1 -> Option B
Quick Check:
Rooms list length after add = 1 [OK]

Quick Trick: Appending one room increases list length to 1 [OK]

Common Mistakes:

MISTAKES

Assuming rooms list remains empty
Expecting error due to string instead of object
Confusing print output with None

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What will be the output of this code?

Step 1: Understand Hotel initialization

Step 2: Add room1 to rooms list

Step 3: Print length of rooms list

Final Answer:

Quick Check:

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