Answer
volatile ensures read/write operations always use the most current value and prevents CPU/compiler reordering.
It is essential for correctness in low-level, lock-free synchronization.
Quick Answer
volatile ensures that reads and writes to a field always go directly to memory — the CPU and compiler cannot cache or reorder them. Without it, one thread might read a stale cached value that another thread already updated. Use it for simple shared flags between threads.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
Want to bookmark, take notes, or join discussions?
Sign in to access all features and personalize your learning experience.
Source: SugharaIQ