System Design – Load Balancing
Practice system design interview questions focused on load balancing. Cover algorithms, health checks, and distributing traffic across servers. Answer questions and receive feedback on trade-offs and clarity. Ideal for software engineer system design prep. First 2 questions are free with full feedback.
- Level Intermediate
- Questions 12
Try any track free — first 2 questions include full AI feedback. Subscribe to finish the track and unlock everything. Type or speak your answer — the first 2 questions include scoring and detailed AI feedback.
Sample system design – load balancing interview questions
Preview 6 questions from this track in quiz order. In the full quiz you answer one at a time — type or speak — then get a score and feedback.
-
What is a load balancer and why is it used?
What a strong answer includes
Distributes traffic across multiple servers.
-
Explain round-robin load balancing.
What a strong answer includes
Sends requests to servers in rotation.
-
What is the least-connections algorithm?
What a strong answer includes
Sends traffic to the server with the fewest active connections.
-
How does a load balancer know if a server is healthy?
What a strong answer includes
Uses health checks.
-
What is the difference between Layer 4 and Layer 7 load balancing?
What a strong answer includes
Layer 4 is transport; Layer 7 can inspect HTTP content.
-
How do you handle a server failure behind a load balancer?
What a strong answer includes
Removes it from rotation via health checks.