Stripe
Hard
Software EngineerDesign ledger and bikemap integration
System Design
192
0
July 29, 2025
Load Balancing Interview Questions
Load balancing questions test your understanding of how to distribute traffic across multiple servers effectively.
Expect discussions on algorithms (round-robin, least connections, consistent hashing), health checks, and failover strategies.
Interviewers evaluate whether you understand when and why to use different load balancing approaches.
395Questions
100Companies
Easy 17 • Medium 133 • Hard 242Difficulty mix
Common load balancing interview patterns
- Round-robin vs least-connections vs consistent hashing
- Layer 4 (TCP) vs Layer 7 (HTTP) load balancing
- Health checks and automatic failover
- Session affinity and sticky sessions
- Global server load balancing (GSLB) for multi-region
- Load balancer as a single point of failure and redundancy
Load balancing interview questions
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Netflix
Hard
Software EngineerDesign an ad frequency capping system
System Design
118
0
March 9, 2026
Rippling
Medium
Software EngineerDesign expense rules engine and return type
System Design
78
0
August 7, 2025
Anthropic
None
Software EngineerDesign GPU inference request batching
ML System Design
45
0
March 13, 2026
Anthropic
Medium
Software EngineerDesign a distributed web crawler
System Design
69
0
January 6, 2026
Uber
Hard
Software EngineerDesign real-time driver heatmap system
System Design
48
0
August 1, 2025
DoorDash
Hard
Software EngineerDesign a 3-day donation platform
System Design
66
0
August 13, 2025
Anthropic
Hard
Software EngineerDesign a low-latency ML inference API
ML System Design
39
0
September 6, 2025
OpenAI
Medium
Software EngineerDesign a Hosted Notebook Platform
System Design
45
0
April 12, 2026
Optiver
Hard
Software EngineerDesign low-latency trading infrastructure
System Design
40
0
December 5, 2025
OpenAI
Nan
Software EngineerDesign a distributed crossword fill solver
System Design
33
0
January 17, 2026
Confluent
Hard
Software EngineerDesign a temporary email service
System Design
42
0
July 27, 2025
OpenAI
Hard
Software EngineerDesign a GPU credit system and scheduler
ML System Design
30
0
August 13, 2025
Netflix
Hard
Software EngineerDesign ads frequency capping service
System Design
22
0
July 17, 2025
Citadel
Hard
Software EngineerDesign a low-latency trading system
System Design
31
0
August 9, 2025
Optiver
Hard
Software EngineerDesign a topic-based news subscription system
System Design
18
0
September 6, 2025
OpenAI
Hard
Software EngineerDesign a CI/CD pipeline with scheduler
System Design
24
0
August 13, 2025
Anthropic
Medium
Software EngineerHow would you scale batch image pipelines?
System Design
17
0
November 10, 2025
Anthropic
Medium
Machine Learning EngineerOptimize MapReduce performance
System Design
18
0
August 4, 2025
DoorDash
Medium
Software EngineerDesign a donation service for a 3‑day charity
System Design
18
0
January 18, 2026
Common mistakes with load balancing
- Forgetting that the load balancer itself can be a bottleneck
- Using sticky sessions when stateless design is possible
- Not considering health check latency and false positives
- Ignoring the difference between L4 and L7 load balancing
How load balancing questions are evaluated
Demonstrate understanding of trade-offs between different algorithms.
Explain how the system handles server failures gracefully.
Consider the load balancer in the context of the overall system architecture.