Quick Answer
Process: independent program with its own memory space, expensive to create and switch, communication via IPC. Thread: lightweight execution unit within a process, shares process memory (heap), cheap to create, communication via shared memory (but needs synchronization). Java threads share heap but each has its own stack, program counter, and registers.
Answer
Process: Independent execution with separate memory. Thread: Lightweight execution sharing memory within a process. Threads improve concurrency; processes ensure isolation.
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Verified Answer
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