12-51.
12-52.
12-53.
12-54.
12-55.
12-56.
Which of the following viruses only executes
itself if a certain set of conditions is met?
1. Worm
2. Trojan horse
3. Logic bomb
Which of the following viruses is generally the
most destructive to a system?
1. Worm
2. Trojan horse
3. Logic bomb
Which of the following is NOT a precaution in
preventing virus infections?
1. Making regular back-ups
2. Using only authorized software
3. Periodically checking the size of the
COMMAND.COM file
4. Using software from an unauthorized source
It is usually possible to recover some data from a
fixed disk even after a severe head crash.
1. True
2. False
In caring for a fixed disk, which of the following
actions NOT recommended?
1.
2.
3.
4.
Limit the number of times the system is
turned on and off
Avoid eating, drinking, and smoking around
computer systems
Clean the fixed disk on a regular basis
Perform the low-level format of a fixed disk
in the position and temperature that the disk
will be used
A multimedia CD-ROM is a disc that contains
which of the following types of information?
1.
2.
3.
4.
Data files only
Digitized audio only
Digitized video only
Data files, digitized audio, and digitized
video
12-57.
12-58.
12-59.
12-60.
12-61.
Data is stored on a CD-ROM by which of the
following methods?
1. Magnetizing spots on the disc
2. Etching tiny ones and zeros on the disc
3. Punching tiny holes through the disc
4. Etching pits between lands on the disc
What is the diameter of a compact disc?
1. 120mm
2. 130 mm
3. 140 mm
4. 150 mm
The data area of a CD-ROM consists of which of
the following sections?
1.
2.
3.
4.
The table of contents, the lead-out area, and
the clamping area
The table of contents and the program area
only
The table of contents, the program area, and
the lead-out area
The lead-out area and the clamping area
CD-ROM storage has all of the following
advantages except which one?
1.
2.
3.
4.
Fast access time
Storage capacity of over 540 megabytes of
information
Extremely durable
Can store a mixture of digital information
Data is stored on a CD-ROM disc in which of the
following ways?
1.
2.
3.
4.
In a series of separate tracks only
In a series of separate tracks divided into
sectors
In a continuous spiral track divided into
sectors
In a continuous spiral sector divided into
tracks
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