A+ Essentials Chapter 3

1. What function does the external data bus have in the PC?

The external data bus determines the clock speed for the CPU.

The CPU uses the external data bus to address RAM.

The external data bus provides a channel for the flow of data andcommands between the CPU and RAM.

The CPU uses the external data bus to access registers.

The external data bus provides a channel for the flow of data and commands between the CPU and RAM.

Explanation

The external data bus provides a channel for the flow of data and commands between the CPU and RAM.

About This Quiz

Microprocessors

In this chapter, you will learn how to

• Identify the core components of a CPU
• Describe the relationship of CPUs and RAM
• Explain the varieties of modern CPUs
• Identify specialty CPUs
• Install and upgrade CPUs

2. The Intel Core Duo has which of the following advantages over the Pentium M?

Level 1 cache

64-bit data bus

Quad pipelining

Dual processors

The Intel Core Duo has dual processors, a definite advantage over the Pentium M.

Explanation

The Intel Core Duo has dual processors, a definite advantage over the Pentium M.

3. What do registers provide for the CPU?

Registers determine the clock speed.

The CPU uses registers for temporary storage of internal commands and data.

Registers enable the CPU to address RAM.

Registers enable the CPU to control the address bus.

The CPU uses registers for temporary storage of internal commands and data.

Explanation

The CPU uses registers for temporary storage of internal commands and data.

4. When a tech adds a new Athlon 64 X2 processor to a motherboard, which of
the following should he or she check? (Choose the best answer.)

Clock speed of the CPU, clock multiplier for the CPU

Clock speed of the CPU, clock multiplier for the CPU, voltage settings on the motherboard

Clock speed of the CPU, clock multiplier for the CPU, voltage settings on the motherboard, system clock speed

Voltage settings on the motherboard, system clock speed

Even with the CPUID built into modern processors, a good tech should
check the motherboard settings for speed, clock multiplier, and voltage. He or she should also know the speed of the CPU.

Explanation

Even with the CPUID built into modern processors, a good tech should
check the motherboard settings for speed, clock multiplier, and voltage. He or she should also know the speed of the CPU.

5. A donor gives five Socket 939 Athlon X2 processors to the nonprofit corporation
for which Jane works as a technician. She has several systems with Socket 939
motherboards and Athlon 64 CPUs installed. Her boss wants her to upgrade
five systems with the new processors but to keep the upgrade costs low if
possible by using the existing motherboards.

Primary objective Upgrade the systems with faster CPUs.

Optional objective Use existing motherboards.

Proposed solution Remove the Athlon 64 CPUs on five systems and
replace them with the new Athlon 64 X2 CPUs. Update the motherboards
following the motherboard manufacturer’s guidelines.

The proposed solution:

Meets only the primary objective

Meets only the optional objective

Meets the primary and optional objectives

Meets neither objective

That’s a little more like it. With a minor motherboard update, Jane can put those Athlon 64 X2 processors to work!

Explanation

That’s a little more like it. With a minor motherboard update, Jane can put those Athlon 64 X2 processors to work!

6. The Intel Core Duo processor has two 32-KB Level 1 caches, whereas the
Athlon 64 X2 has one 128-KB Level 1 cache. What does the cache provide for
the processor(s)?

It enables the CPU to continue working during pipeline stalls.

It enables the CPU to continue working during hard drive refreshes.

It enables the CPU to access RAM.

It enables the CPU to access the chipset memory controller.

Cache enables the CPU to continue working during pipeline stalls.

Explanation

Cache enables the CPU to continue working during pipeline stalls.