Which of the following has allowed computers to have more memory capabilities without making them extremely expensive virtual memory tiered memory volatile memory nonvolatile memory

Virtual memory may provide a reasonably large storage capacity in an affordable cost.

Virtual Memory: the operating systems of all modern computers have virtual memory where a disk is used to transfer the data temporarily from the RAM when physical memory of the computer falls short. Though it is cheap but it does not allow computers to have more memory and frequent swapping even makes the PC slow.

Tiered memory: has the fastest data storage and even has a good storage capacity but is pretty expensive.

Volatile memory: volatile memories have good performance in terms of speed and storage but they still are a little expensive in comparison to non-volatile memory.

Non-volatile memory: they do not provide with large storage capacities.

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