Booking conflict resolution in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if two bookings overlap.

LLD

def is_conflict(booking1, booking2):
    return booking1.end_time [1] booking2.start_time

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

A<=

B>

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' causes missing conflicts when bookings overlap.

Two bookings conflict if the end time of the first booking is after the start time of the second booking.

2fill in blank

medium

Complete the code to add a booking only if no conflicts exist.

LLD

def add_booking(bookings, new_booking):
    for b in bookings:
        if is_conflict(b, new_booking):
            return False
    bookings.append([1])
    return True

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

Anew_booking

Bb

Cbookings

DNone

Attempts:

3 left

💡 Hint

Common Mistakes

Appending an existing booking instead of the new one.

We append the new booking to the list only if no conflicts are found.

3fill in blank

hard

Fix the error in the conflict check to correctly detect overlapping bookings.

LLD

def is_conflict(booking1, booking2):
    return booking1.start_time [1] booking2.end_time and booking1.end_time [2] booking2.start_time

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

A<

B>

C<=

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= or >= causes incorrect overlap detection.

Two bookings overlap if booking1 starts before booking2 ends and booking1 ends after booking2 starts.

4fill in blank

hard

Fill both blanks to create a function that returns all conflicting bookings for a new booking.

LLD

def find_conflicts(bookings, new_booking):
    conflicts = []
    for b in bookings:
        if b.start_time [1] new_booking.end_time and b.end_time [2] new_booking.start_time:
            conflicts.append(b)
    return conflicts

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

A<

B>

C<=

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= or >= causes missing some conflicts.

We check if existing booking starts before new booking ends and ends after new booking starts to find conflicts.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps booking IDs to their durations for bookings longer than 1 hour.

LLD

durations = {b.id: (b.end_time - b.start_time).total_seconds() / 3600 for b in bookings if (b.end_time - b.start_time) [1] [2] and b.id [3] None}

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

A>

B1

C!=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' for duration check.

Checking ID equality instead of inequality.

We filter bookings longer than 1 hour and ensure booking ID is not None.