We need to implement locks to deal with concurrency. Locks that are placed by user command are known as ______ locks. (HINT: WRITE ANSWER IN CAPITAL LETTERS)

The answer is USER-DEFINED LOCKS.

User-defined locks are locks that are explicitly created and managed by the application or user to control access to shared resources in a concurrent system. Unlike system-defined locks, which are automatically managed by the language or framework used, user-defined locks provide developers with flexibility and control over how resources are protected. This type of locking mechanism is essential in scenarios where multiple threads or processes might attempt to read or write to a shared variable or data structure simultaneously, potentially leading to data inconsistency or corruption. By implementing user-defined locks, developers can ensure that operations on shared resources are executed in a controlled manner, maintaining the integrity of the application.