Computer Basic Information
The magnetic disks and drums are like recirculating shift registers because

their storage is non volatile
their access times are about the same
stored data is available for reading over and over again in the same order.
None of these
they have about the same storage capacity

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Computer Basic Information
Which of the following is true concerning personal computers?

They decrease the demand for mainframe computers
They have been most successful in the home
Their future is not so bright owning to the improved cost-performance ratio of minis and mainframes
The electronic spreadsheet has been a primary reason for their popularity
None of these

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