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Multiple Choice

What kind of configuration can lead to thread-safety problems in software applications?

Mutable data in shared state is the correct choice because it encapsulates a fundamental issue in concurrent programming. When multiple threads access shared data that is mutable, each thread can alter the state of that data. This can lead to inconsistent states and unexpected behaviors if proper synchronization mechanisms are not applied. For instance, if one thread modifies a shared object while another thread is reading it, the reader might receive incomplete or corrupted data, resulting in thread-safety problems. In contrast, non-final variables can be managed in a thread-safe manner if they are properly synchronized. Singleton instances created multiple times may lead to design issues or resource conflicts but don't inherently cause thread-safety problems unless mutable shared states are involved. Using static methods isn't a direct cause of thread safety issues either; it depends more on how those methods access and modify shared state. Thus, the shared mutable data is the primary source of potential concurrency issues, making it crucial to handle with care when designing multi-threaded applications.

Mutable data in shared state is the correct choice because it encapsulates a fundamental issue in concurrent programming. When multiple threads access shared data that is mutable, each thread can alter the state of that data. This can lead to inconsistent states and unexpected behaviors if proper synchronization mechanisms are not applied. For instance, if one thread modifies a shared object while another thread is reading it, the reader might receive incomplete or corrupted data, resulting in thread-safety problems.

In contrast, non-final variables can be managed in a thread-safe manner if they are properly synchronized. Singleton instances created multiple times may lead to design issues or resource conflicts but don't inherently cause thread-safety problems unless mutable shared states are involved. Using static methods isn't a direct cause of thread safety issues either; it depends more on how those methods access and modify shared state. Thus, the shared mutable data is the primary source of potential concurrency issues, making it crucial to handle with care when designing multi-threaded applications.