Can a Data Race Happen on a Single-Core Machine? 1. The Question I woke up wondering: Can a data race happen on a single-core machine?. A data race occurs when a program contains two conflicting accesses (write/write or read/write) that are not ordered by a happens-before relationship. This is the definition from Java Language Specification. My first instinct was to ask Claude. The answer I received confidently showed a counter++ example and called it a “data race.”| Ao Li