Which design type is this question?

It is a distributed infrastructure question. You design a load balancer and explain your choices the way you would in an interview.

Is this question asked at entry level?

It is marked Medium. Entry-level engineers can practise it, but it expects you to reason about requirements and trade-offs, not only list components.

What should I cover first?

Start with the guarantees the system must give and the failures it must survive. Agree on scope with the interviewer before you design anything.

Can I practise it for free?

Yes. It is one of the free questions. Sign up to practise it step by step. When you finish, Lala, your personalized AI mentor, can review your design for 30 credits.

Design a load balancer

FreeDistributed infrastructureMedium

Load balancing
High availability
Scalability

Quick answer

This distributed infrastructure interview question asks you to design a load balancer. Aim for a design that keeps working across many machines and failures, then explain partitioning, replication, coordination and trade-offs. Interviewers want to see how you reason about failures, consistency and scale.

The problem

Design a load balancing system that efficiently distributes traffic across multiple servers to ensure high availability, fault tolerance, and optimal resource utilization.

Key concepts

Load balancing
High availability
Scalability
Fault tolerance

How you’ll practise

6 short steps · save and come back any time

Requirements
Estimate
Data model and API
Partitioning and replication
Consistency and failures
Wrap-up

Lala, personalized to you, gives a hint when you ask and reviews your design when you are ready.

What do interviewers look for?

In any distributed infrastructure design round.

States the consistency and availability guarantees up front
Explains partitioning and replication choices
Describes how nodes agree and recover after failures
Handles network partitions and slow nodes
Plans for adding and removing capacity safely
Names the trade-offs instead of hiding them

Questions people ask about this interview question

Which design type is this question?: It is a distributed infrastructure question. You design a load balancer and explain your choices the way you would in an interview.
Is this question asked at entry level?: It is marked Medium. Entry-level engineers can practise it, but it expects you to reason about requirements and trade-offs, not only list components.
What should I cover first?: Start with the guarantees the system must give and the failures it must survive. Agree on scope with the interviewer before you design anything.
Can I practise it for free?: Yes. It is one of the free questions. Sign up to practise it step by step. When you finish, Lala, your personalized AI mentor, can review your design for 30 credits.

The problem

Key concepts

How you’ll practise

What do interviewers look for?

Questions people ask about this interview question

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