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Per Glenn Fiedler (Floating Point Determinism), bit-exact deterministic lockstep across platforms typically struggles with which subsystem?
AMemory allocator pointer values reused as seeds
BInteger arithmetic which is identical everywhere
CASCII string concatenation across encodings
DIEEE-754 float ops with different compilers / FPUs
Answer & Solution
Correct answer: D. IEEE-754 float ops with different compilers / FPUs
Fiedler 'Floating Point Determinism': different x87 vs SSE2 vs ARM rounding + transcendental impls can diverge. Many lockstep games use fixed-point math instead.
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