A mutex is a synchronization mechanism that allows programs to provide the feature of mutual exclusion. If a mutex is used to protect access to a buffer, which of the following statements are true?

Select $2$ correct answer$($s$)$

Question $25$ options:

A mutex is automatically locked when the protected buffer is accessed and automatically unlocked after the access is complete.

A process or thread must lock the mutex before accessing the buffer.

Multiple processes or threads can simultaneously lock a mutex while protecting the buffer when accessing it$.$

A mutex can be used to ensure only one process or thread has access to the buffer at a time.

A mutex cannot be used to protect resources like a buffer.