Book Errata
A+ AIO Certification Exam Guide,
2nd Edition, by Michael Meyers
Errata
p. xvi. Memory Management questions are roughly 10% of the exam, not 30% as listed.
p. 13, first paragraph. To avoid any confusion, the second sentence should read as follows (added words in bold): "The power supply takes standard 110-volt AC power and converts it into 12-volt, 5-volt, and sometimes 3.3-volt DC power."
p. 45, question 4. The question should read "Which of the following is true about serial ports?" Currently the question asks "Which of the following is not true..." The answers on page 47 are correct.
p. 169, Figure 4.40. The figure shows a 486 motherboard with 16 SIMM slots. It should be a motherboard with only 8 SIMM slots. The text assumes an 8-slot board.
p. 229, answer to question 1. The correct answer is c, as listed, not b and c. Here is the author's explanation:
[M]y motive for the "BIOS is software" is based on my experience that newer folks have a serious conceptualization problem with any type of firmware. As you read in the book, I go to fairly high extremes (my editor thinks too much) to clarify this concept. I do say that it is "software" but I also bring up the point that it is stored on ROM/CMOS/Flash whatever - depending on the point at the moment. I feel this small deception, when one looks at the entire conceptualization process of teaching firmware to what I assume to be fairly newbie demographics, is warranted. But the truly correct answer is BIOS is FIRMWARE (or software drivers).
p. 324, Table 8.1. The table is completely messed up. Here is what it should look like:
| Drive Type | Capacity (Meg) | Cylinders | Heads | Sectors | Write Precomp | Landing Zone | ||||||
| 1 | 10 | 306 | 4 | 17 | 128 | 305 | ||||||
| 2 | 20 | 615 | 4 | 17 | 300 | 615 | ||||||
| 3 | 30 | 615 | 6 | 17 | 300 | 615 | ||||||
| 4 | 62 | 940 | 8 | 17 | 512 | 940 | ||||||
| 5 | 47 | 940 | 6 | 17 | 512 | 940 | ||||||
| 6 | 20 | 615 | 4 | 17 | None | 615 | ||||||
| 7 | 30 | 462 | 8 | 17 | 256 | 511 | ||||||
| 8 | 30 | 733 | 5 | 17 | None | 733 | ||||||
| 9 | 112 | 900 | 15 | 17 | None | 901 | ||||||
| 10 | 20 | 820 | 3 | 17 | None | 820 | ||||||
| 11 | 35 | 855 | 5 | 17 | None | 855 | ||||||
| 12 | 50 | 855 | 7 | 17 | None | 855 | ||||||
| 13 | 20 | 306 | 8 | 17 | 128 | 319 | ||||||
| 14 | 42 | 733 | 7 | 17 | None | 733 | ||||||
| 15 | Reserved | |||||||||||
p. 365. The correct answer to question 9 is d. rather than c. Set PIO modes in CMOS (except for on very old systems that use an I/O card rather than an onboard hard drive controller).
p. 385, Table 9.2. Six instances of MB/S should read MB/s.
p. 386, Table 9.3. A couple of typos in the table. Under SSA, MB/S should read MB/s. Under IEEE1394, MB/S actually should be Mb/s, for megabits per second, rather than megabytes per second. To keep the numbering uniform, the correct top speed is 50 MB/s, rather than 400MB/s. Also 72 meers should read 72 meters.
p. 404, third paragraph. "The UART chip converts the serial bits of analog data ..." should read "The UART chip converts the serial bits of digital data ..."
p. 510, question 6, answer c. should read "charge, write, transfer, fix, clean."
p. 554, second paragraph. The paragraph should read as follows (changes in bold):
The disk cache monitors all acces to the drive, keeping a copy of accessed data in its holding area (Figure 13.8a). Whenever a program needs to get something from the hard drive, the cache first checks its holding pen to see if the data is there. If the data is present, the cache provides the data, thus avoiding any need to access the relatively slow hard drive and making the system much faster (Figure 13.8b).
p. 557, last paragraph. "The number, in this case 1024, is the cache size." should read "The number, in this case 1024, is the cache size in kilobytes."
p. 587. The first sentence under 32-Bit File Access should read as follows (changes in bold): If you have Windows for Workgroups or Windows 3.11 and have IFSHLP.SYS loaded in CONFIG.SYS (which loads by default in these versions), you can enable 32-bit file access to make Windows even faster.
p. 605. The correct answer for question 1 should be d rather than c. The answer text is correct. Windows 3.11 ran only in 386 Enhanced Mode.
p. 640. The NameCache and PathCache in the text are reversed. The proper settings are as follows:
NameCache a9 0a 00 00
PathCache 40 00 00 00
p. 661, second paragraph. The keyboard uses IRQ 1, not IRQ 2.
p. 823, TCP/IP section. TCP/IP stands for Transmission Control Protocol/Internet Protocol, rather than Terminal Control Protocol/Internet Protocol.
p. 907. DNS stands for Domain Name System, rather than Dynamic Name System.
p. 916. The definition of a hub should read as follows:
Hub: An electronic device that sits at the center of a star topology network, providing a common point for the connection of network devices. In a 10BaseT Ethernet network, the hub contains the electronic equivalent of a properly terminated bus cable; in a Token Ring network, the hub contains the electronic equivalent of a ring.