Quiz 4 - Chapter 7 - IT 104A

The universal serial bus (USB) controller is a virtual device that acts as an interface between the operating system, device drivers, and applications and the devices that are attached via the USB host.

• True

• False

On a magnetic tape, the inter-record gap (IRG) is about 2 inches long regardless of the sizes of the records it separates.

• True

• False

Direct access storage devices (DASDs) are devices that can directly read or write to a specific place on a disk.

• True

• False

A fixed-head disk is lower in cost than a movable head disk.

• True

• False

A fundamental difference between an optical disc and a magnetic disk is the track and sector design.

• True

• False

Two of the most important measures of optical disc drive performance are sustained data-transfer rate and longest access time.

• True

• False

The first major users of CD-ROMs were libraries and corporations that needed text-based information and reference works such as encyclopedias, system documentation and user training material.

• True

• False

An MO disk is covered with a silicone-based glass alloy that needs something more powerful than the magnetic field generated by the read/write head to change states.

• True

• False

DASDs are good for files with low activity (the percent of records accessed) or for users who access records in a random fashion.

• True

• False

The job of the I/O control unit is to keep up with the I/O requests from the CPU and pass them down the line to the appropriate control unit.

• True

• False