What is used to indicate whether the corresponding page is in real memory or not?

What is on the top of the memory hierarchy?

Static memory consists of:

A memory consistency means:

The virtual memory is divided into:

Which of computers used virtual memory?

Where was virtual memory used for the first time?

Dynamic memory consists of:

If one process wants to read from the memory and another wants to write where then:

Choose all operations with the main memory:

What kind of addresses does the virtual memory use: