By Michael Meyers
Mike Meyers has performed it back. the number 1, best-selling research advisor for CompTIA's A+ Certification checks has been thoroughly revised and up-to-date for the recent 2001 checks. Written by means of the industry's top authority on A+ Certification, this must-have reference deals entire assurance of all fabric on either the center and working method applied sciences checks. Plus, the bonus CD-ROM includes 6 perform exams, thousands of questions, and LearnKey(tm) movies. This entire consultant not just is helping you move the A+ certification checks, but in addition teaches you ways to be a professional technician.
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Additional resources for All-in-one A+ certification exam guide
A 486 has a 32-bit external data bus and 30-pin SIMMs are 8 bits wide, so: 32 ÷ 8 = 4. We need four 30-pin SIMMs per bank for a 486. How many 168-pin DIMMs are needed to make a bank on a Pentium III? A Pentium III has a 64-bit external data bus and 168-pin DIMMs are 64-bits wide so: 64 ÷ 64 = 1. We need one 168-pin DIMM per bank for a Pentium III. Stick with this formula, no matter what they throw at you in the future. It will always tell you the number of sticks to make a bank. For years, banking was a critical issue when dealing with RAM.
A. Parallel port b. Serial port c. DB-15 port d. FireWire port 3. A printer commonly plugs into which of the following ports? a. Parallel port b. Serial port c. DB-9 port d. DB-15 port 4. Which device(s) use the PS/2-style mini-DIN connector? a. Only keyboards b. Only mice c. Printers and mice d. Keyboards and mice 5. John finds an expansion card in a second-hand computer store with no descriptive tag. It has a cylindrical connector that looks suspiciously like a cable TV connector and a d-shaped, two-row, 15-pin female socket.
In the original IBM PC, the most DRAM that the PC could use was 640K (655,360 bytes). Later in the book, I'll explain this limitation-but for now I need you to trust me. I promise to completely clarify this limit later. " 37 PCs need byte-wide RAM. Although today's DRAM chips can have widths of greater than one bit, back in the old days all DRAMS were one bit wide. That means you only had sizes like 64K x 1 or 256K x 1-always one bit wide. So how was one-bit-wide DRAM turned into eight-bit-wide memory?