Explain the concept of load balancing and its types.
Explores distributing traffic across servers to optimize resource use and reliability.
Why Interviewers Ask This
Scalability is key for e-commerce platforms. Interviewers assess your knowledge of handling high traffic and maintaining uptime through distribution strategies.
How to Answer This Question
Define load balancing as distributing workloads across multiple computers. Discuss algorithms like Round Robin, Least Connections, and Hash-based. Mention hardware vs software load balancers. Highlight benefits like fault tolerance and scalability.
Key Points to Cover
- Traffic distribution
- Algorithms overview
- Fault tolerance
- Scalability benefits
Sample Answer
Load balancing distributes incoming network traffic across multiple servers to ensure no single server becomes overwhelmed. Algorithms like Round Robin cycle through servers, while Least Connections sends traffic to the least busy one. This approach improves availability, reduces latency, and allows the system to scale horizontally during peak loads.
Common Mistakes to Avoid
- Confusing with clustering
- Ignoring health checks
- Failing to mention persistence
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