When are we racing, and what is the condition?

Understanding race conditions in concurrent programming

This is an easy conceptual question on concurrency fundamentals. It tests whether you can define a race condition clearly and explain why they matter in systems where multiple threads or processes access shared resources.

Race conditions are a cornerstone topic in any interview that touches concurrent systems—from low-latency trading infrastructure to distributed services. Interviewers ask this to confirm you understand the root cause of non-deterministic behaviour, the conditions under which it occurs, and why defensive programming matters when writing multi-threaded code.

• Shared state and simultaneous access
• Ordering dependencies between operations
• Data races vs. higher-level race conditions
• Synchronization and mutual exclusion as mitigations