Delivery agent assignment in LLD - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Key factors in delivery agent assignment

Which factor is the most critical to consider when assigning a delivery agent to a new order to ensure timely delivery?

A The delivery agent's shoe size

B The delivery agent's favorite food preferences

C The color of the delivery agent's vehicle

D The delivery agent's current location relative to the pickup point

💡 Hint

Think about what affects how fast the agent can reach the pickup location.

The delivery agent's current location is crucial because it directly impacts how quickly they can reach the pickup point and start the delivery.

❓ Architecture

intermediate

Component responsible for agent assignment

In a delivery system architecture, which component should handle the logic for assigning delivery agents to orders?

A Delivery Assignment Service

B User Interface Layer

C Database Storage Engine

D Payment Processing Module

💡 Hint

Consider which part of the system makes decisions about who does what.

The Delivery Assignment Service is designed to handle the logic of matching orders with available delivery agents based on various factors.

❓ scaling

advanced

Scaling delivery agent assignment for peak hours

What is the best approach to scale the delivery agent assignment system during peak order times to maintain performance?

A Implement a distributed queue system to handle assignment requests asynchronously

B Increase the font size on the delivery app interface

C Reduce the number of delivery agents available

D Disable the assignment system temporarily

💡 Hint

Think about how to handle many requests efficiently without blocking.

A distributed queue system allows the assignment requests to be processed asynchronously and in parallel, improving scalability and responsiveness during peak times.

❓ tradeoff

advanced

Tradeoff between assignment speed and accuracy

Choosing between a fast but less accurate delivery agent assignment and a slower but more accurate one, what is a key tradeoff to consider?

A Slower assignment always leads to better customer satisfaction

B Accuracy does not affect delivery times or customer experience

C Faster assignment may reduce delivery quality but improve customer wait times

D Speed and accuracy are unrelated in delivery systems

💡 Hint

Think about how speed and quality affect customer experience differently.

Faster assignment can reduce wait times but might assign less optimal agents, affecting delivery quality. Slower assignment may improve match quality but increase wait times.

❓ estimation

expert

Estimating system capacity for delivery agent assignment

If a city has 10,000 active delivery agents and each agent can handle 3 deliveries per hour, what is the maximum number of orders the assignment system should support per hour without delays?

A 13,000 orders per hour

B 30,000 orders per hour

C 3,000 orders per hour

D 10,000 orders per hour

💡 Hint

Multiply the number of agents by deliveries per agent per hour.

10,000 agents × 3 deliveries each = 30,000 orders per hour capacity without delays.