Emergency handling in LLD - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Understanding Emergency Handling Priorities

In an emergency handling system, which approach best ensures that the most critical emergencies are addressed first?

A Handle emergencies randomly to avoid bias.

B Assign priority levels to emergencies and always handle the highest priority first.

C Process emergencies in the order they arrive without prioritization.

D Handle only emergencies reported by senior staff.

💡 Hint

Think about how hospitals triage patients.

Assigning priority levels ensures critical emergencies get immediate attention, improving outcomes.

❓ Architecture

intermediate

Designing a Scalable Emergency Notification System

Which architecture best supports sending emergency alerts to millions of users quickly and reliably?

A A distributed message queue with multiple workers sending notifications in parallel.

B Sending notifications only during business hours to reduce load.

C Users polling the server every minute to check for emergencies.

D A single server sending notifications sequentially to each user.

💡 Hint

Think about how to handle large volumes efficiently.

A distributed message queue with parallel workers scales well and reduces delays.

❓ scaling

advanced

Estimating Capacity for Emergency Call Handling

Your emergency call center expects 10,000 calls per hour during peak times. Each call takes 3 minutes on average. How many call agents are needed to handle calls without delay?

A 500 agents

B 50 agents

C 200 agents

D 1000 agents

💡 Hint

Calculate total call minutes per hour and divide by agent availability.

10,000 calls * 3 minutes = 30,000 minutes per hour. Each agent can handle 60 minutes per hour, so 30,000 / 60 = 500 agents.

❓ tradeoff

advanced

Choosing Between Synchronous and Asynchronous Emergency Alerts

Which tradeoff is true when choosing asynchronous emergency alerts over synchronous alerts?

A Asynchronous alerts guarantee immediate delivery but use more resources.

B Synchronous alerts are always better for emergency systems.

C Synchronous alerts reduce latency but cannot handle high loads.

D Asynchronous alerts may have slight delays but improve system scalability.

💡 Hint

Consider how asynchronous processing affects speed and load.

Asynchronous alerts may delay slightly but allow the system to handle many alerts efficiently.

❓ component

expert

Identifying the Critical Component for Emergency System Reliability

Which component is most critical to ensure no emergency alert is lost in a distributed emergency handling system?

A User interface for reporting emergencies.

B Database storing user profiles.

C Persistent message queue with retry and dead-letter handling.

D Load balancer distributing requests evenly.

💡 Hint

Think about message durability and fault tolerance.

A persistent message queue with retries and dead-letter queues ensures alerts are not lost even if failures occur.