Elevator, Floor, Request classes in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the Elevator class with a constructor.

LLD

class Elevator:
    def __init__(self, [1]):
        self.current_floor = 0
        self.requests = []

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

Afloors

Bid

Cspeed

Dcapacity

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'capacity' or 'speed' as the only constructor parameter.

The Elevator class constructor should take an identifier id to distinguish elevators.

2fill in blank

medium

Complete the code to add a method that adds a floor request to the elevator.

LLD

class Elevator:
    def add_request(self, [1]):
        self.requests.append(request)

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Arequest

Bfloor_number

Cdestination

Dfloor

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'floor_number' or 'destination' which are not objects.

The method should accept a request object to add to the requests list.

3fill in blank

hard

Fix the error in the Floor class constructor parameter name.

LLD

class Floor:
    def __init__(self, [1]):
        self.number = number
        self.waiting_requests = []

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Afloor_num

Bfloor

CfloorNumber

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Using different parameter names than the assigned variable.

The parameter name should be number to match the assignment self.number = number.

4fill in blank

hard

Fill both blanks to complete the Request class with source and destination floors.

LLD

class Request:
    def __init__(self, [1], [2]):
        self.source = source
        self.destination = destination

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Asource

Bdestination

Cstart

Dend

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'end' which do not match attribute names.

The constructor parameters should be source and destination to match the assignments.

5fill in blank

hard

Fill all three blanks to create a method that checks if the elevator is idle (no requests and at floor 0).

LLD

class Elevator:
    def is_idle(self):
        return len(self.[1]) == 0 and self.[2] == [3]

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

Arequests

Bcurrent_floor

C0

Dfloors

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'floors' or wrong attribute names.

The method checks if requests list is empty and current_floor is 0.