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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0001:  Power Supplies - System Board

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XXI  Chapter 0001: Test for Success Questions
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XXII  Chapter 0001: Test for Success Answers

1. How many power connectors are on an AT system board?

A. 1

B. 2

C. 3

D. 0

Explanation: The AT power supply uses 2 connectors from the power supply, labeled P8 and P9. They are connected to the motherboard by aligning the black wires adjacent to each other.


2. How many power connectors are on an ATX system board?

A. 3

B. 2

C. 1

D. 0

Explanation: The ATX power supply uses a single power connection to the motherboard, labeled P1. The connector has pins with beveled corners to prevent it from being plugged in backwards.


3. What does CMOS stand for?

A. Confidential Metal Operating Systems

B. Complimentary Metal Oxide Semiconductor

C. Complimentary Metal Oxide System

Explanation: CMOS stands for Complimentary Metal Oxide Semiconductor. This is a special chip on the motherboard that is used to store configuration data inputted by the user. This data tells the BIOS what devices are installed in the system and what resources have been allocated to them.


4. True or False: BIOS Queries the CPU about system information?

A. True

B. False

Explanation: The BIOS does check to see if there is a functioning CPU during the first step of the POST routine. However, the BIOS gets most of the configuration information from the CMOS and any other DIP switches or jumpers that are set on the motherboard.


5. The frontside bus communicates with the _________?

A. Video Card




Explanation: The frontside bus is the communication channel from the chipset to the CPU. The memory bus is the channel to the RAM, the AGP bus is the channel to the AGP video card, and the I/O bus is the channel to the I/O devices, such as the NIC, sound, and hard drives.


6. Which of the following is not an I/O Bus (Pick all that apply)

A. Serial Ports

B. USB Ports

C. Parallel Port

D. Keyboard Port

E. None of the above

Explanation: All of the devices listed are part of the I/O bus. This is the slowest bus in the system, and handles data flow between the chipset and the devices attached to the bus.


7. Where is L1 Cache located in your computer?

A. Motherboard



D. None of the Above

Explanation: L1 cache is integrated SRAM in the CPU itself. It is the first memory location that is polled by the CPU when looking for stored data. Some processors, such as the Pentium Pro, have L2 cache on the CPU as well.


8. Which of the following is NOT an AGP Speed?

A. 1x

B. 2x

C. 3x

D. 4x

Explanation: AGP multipliers are found in 1x, 2x, and 4x. There is a specification for 8x AGP coming soon.


9. What does ISA Stand for?

A. Industry Standards association

B. Industry Standard Architecture

C. IBM Standard Architecture

Explanation: ISA stands for Industry Standard Architecture. It specifies an 8-bit bus running at 4.77 MHz or a 16-bit bus running at 8 MHz.


10. The correct choice for the two data path widths of ISA is

A. 8 and 32 Bits

B. 16 and 24 Bits

C. 8 and 16 Bits

D. 4 and 8 Bits

Explanation: ISA defines both a 8-bit and 16-bit bus, running at 4.77 MHz and 8 MHz respectively.


11. What company designed Micro Channel Architecture?

A. Intel

B. Microsoft



Explanation: IBM designed the MCA architecture for their PS/2 line of PC’s. Unfortunately, they tried to license it to manufacturers for $1 per slot, therefore it never was used in any other motherboards.


12. True or False: ISA cards can be put into an EISA slot and still work?

A. True

B. False

Explanation: The EISA architecture was designed to accept both 8-bit and 16-bit ISA cards as well as 32-bit EISA cards.


13. What are the available Data Paths for PCI?

A. 16 and 32

B. 24 and 32

C. 32 and 64

D. 64 and 128

Explanation: PCI can be either 32-bit or 64-bit. The 32-bit variety is the most commonly used in PC’s. 64-bit varieties are more commonly found in datacom hardware, such as routers and bridges.


14. Which of the Following are required for the Plug and Play capability?

A. Plug and Play BIOS

B. Plug and Play O/S

C. Plug and Play Software

D. Plug and Play compatible cards

E. All of the above

Explanation: For Plug and Play to work properly, you must have a Plug and Play system BIOS, a Plug and Play OS, Plug and Play expansion cards, and Plug and Play drivers for the card.


15. What is on IRQ 3?


B. COM 1/3

C. COM 2/4

D. Floppy Drive

Explanation: COM ports 2 and 4 both share IRQ 3. LPT1 uses IRQ 7, COM 1/3 uses IRQ 4, and the Floppy controller uses IRQ 6.


16. What does DMA stand for?

A. Direct Memory Access

B. Down memory Access

C. Direct Multi-Address

D. Disable Memory Algorithms

Explanation: DMA stands for Direct Memory Access. DMA channels that are allocated to devices allow those devices to utilize bus mastering to write data directly into memory, bypassing the CPU.


17. Which of the following Bus Architectures Does NOT support bus mastering?





Explanation: The only bus architecture that does not support bus mastering is ISA.


18. What is the I/O address for the Sound Card?

A. 2f8h

B. 3f8h

C. 330h

D. 220h

Explanation: The I/O address for a Sound Blaster compatible sound card is 220h. COM 2 uses 2F8; COM 1 uses 3F8h.


19. True or False: IRQ’s cannot be shared?

A. True

B. False

Explanation: PCI devices using PCI Steering can share IRQ’s. Non-PCI devices can also share IRQ’s as long as both devices are not being used simultaneously.


20. On Which IRQ would you typically find the Sound Card?

A. 6

B. 10

C. 12

D. 5

E. 15

Explanation: Typically, the sound card will use IRQ 5, I/O 220h. However, some PCI sound cards may use higher IRQ settings, such as IRQ 9.

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