Please answer the 4 multiple choice questions below:

Only the initial, creation time thread in a process is allowed to open and read/write file objects. If a running thread executes a memory reference instruction (an instruction that tries to either load some memory location into a CPU register, or store some CPU register value into some memory location), and the location within the process address space that does not fall on a memory object, the instruction becomes a no-op. When the free-page list that is used to handle page faults becomes depleted; the operating system's page-purger thread is scheduled to run. During a light-weight context switch on Intel x-86 hardware, the CR-3 register must be reset. Only the initial, creation time thread in a process is allowed to open and read/write file objects. If a running thread executes a memory reference instruction (an instruction that tries to either load some memory location into a CPU register, or store some CPU register value into some memory location), and the location within the process address space that does not fall on a memory object, the instruction becomes a no-op. When the free-page list that is used to handle page faults becomes depleted; the operating system's page-purger thread is scheduled to run. During a light-weight context switch on Intel x-86 hardware, the CR-3 register must be reset