The Load Balancer

A medium Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

medium

Seniority

L4

Problem

Implement a LoadBalancer via an ops list. Operations: ['add_server', id], ['remove_server', id], ['get_server']. get_server returns the next server in round-robin over the current servers in the order they were added. Return the result list: None for add/remove, the server id for get_server. If get_server is called with zero servers, the behavior is undefined (test data will not hit this).

Summary

Distribute incoming requests evenly across available servers.

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