Thread features

• Parallelism, independent code parts may be executed on different processes.
• Shared memory, different threads may share the same data.
• The program may be more responsible by proper division to threads.

Thread obstacles

• Synchronization (locks, semaphores), exact policy for accessing any shared data.
• Programs extremely hard to debug and test.
• The program may be dead-locked if over synchronized, on the other hand the program may be incorrect if threads are not synchronized enough.

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