Walmart Labs
Medium
Software EngineerDesign Spring Boot for high availability and background work
System Design
5
0
January 6, 2026
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.
420Questions
112Companies
Easy 21 • Medium 158 • Hard 236Difficulty 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
Filter and sort
Okta
Medium
Software EngineerDesign a Metrics Storage Platform
System Design
5
0
March 30, 2026
StubHub
Medium
Software EngineerDesign Internal Chat and Re-engagement Emails
System Design
2
0
February 16, 2026
Expedia
Hard
Software EngineerDesign a listing connectivity ingestion service
System Design
2
0
November 5, 2025
Snapchat
Hard
Software EngineerDesign a streaming ads system
System Design
2
0
September 6, 2025
BitGo
Hard
Software EngineerCompare core system design tradeoffs with scenarios
System Design
4
0
August 12, 2025
TikTok
Hard
Software EngineerDesign a global notification service
System Design
5
0
July 17, 2025
Microsoft
Hard
Software EngineerDesign a URL Shortener
System Design
5
0
March 20, 2026
Mercor
Medium
Software EngineerExplain VPCs and private/public network connectivity
System Design
5
0
January 17, 2026
Intuit
Hard
Software EngineerDesign AI feature launch and data collection
ML System Design
4
0
September 6, 2025
Coinbase
Hard
Software EngineerDesign a scalable URL shortener with expiration and security
System Design
3
0
August 12, 2025
Bytedance
Medium
Software EngineerDesign a TinyURL-like short link service
System Design
5
0
February 28, 2026
Amazon
Hard
Software EngineerDesign secure multi-tier cloud infrastructure
System Design
4
0
September 6, 2025
Walmart Labs
Hard
Software EngineerDesign airplane seatback entertainment with UI focus
System Design
3
0
July 26, 2025
Microsoft
Medium
Software EngineerDesign an online ticket booking system
System Design
3
0
January 3, 2026
Microsoft
Medium
Software EngineerDesign local sports team recommendation system
System Design
3
0
November 19, 2025
Amazon
Medium
Software EngineerDesign a scalable image-based social network
System Design
4
0
October 31, 2025
Tesla
Hard
Software EngineerDesign concurrency-safe shared payment account API
System Design
2
0
July 26, 2025
Meta
Hard
Software EngineerDesign Top-K, Crawler, and Chess Systems
System Design
3
0
June 2, 2026
Hackerrank
Medium
Software EngineerDesign a URL Shortener
System Design
4
0
March 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.