Ch 8 Lab Solutions

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Chapter 8 Lab Solutions

Lab 8.1 Review Questions

1. COM port settings are always modified using the CMOS Setup program. False
2. A COM port won’t work properly when it is sharing an IRQ with another COM port. True 
3. COM4 always uses IRQ 7. True 
4. COM2 defaults to IRQ 3. True 
5. If more than two COM ports are required, an expansion card can be installed to provide additional functionality. True 
6. Describe how an IRQ conflict occurs.
Answer: An IRQ conflict occurs when two devices attempt to use the same IRQ.
7. What is an I/O expansion card?

Answer: An I/O card is an expansion card that typically contains two serial ports and one parallel port.
8. Briefly describe, in your own words, each fundamental rule of PC troubleshooting.
Answer: Answers will vary but should summarize each step of the Fundamental Rules of Troubleshooting.

Lab 8.2 Review Questions

1. Only two devices at a time can use an I/O address. False
2 Every device attached to a computer requires a DMA address. False
3. An I/O address “resource conflict” occurs when two devices attempt to use the same I/O address. True 
4. An I/O address is a physical location on the hard drive where the CPU will store data. False
5. All PCs have 3 DMA channels. False

6. Describe the difference between an I/O address and a DMA channel.

Answer: DMA is a chip that resides on the system board and provides channels that a device may use to send data directly to memory, bypassing the CPU. I/O addresses are numbers that are used by devices and the CPU to manage communication between them.

Lab 8.3 Review Questions

1. Hardware configuration changes can cause CMOS errors because the setup information doesn’t agree with the actual hardware configuration. True 
2. While you are troubleshooting a problem, it is best to make only one change at a time. True 
3. The error message “No Operating System found” normally indicates that the computer’s hard drive isn’t formatted or could not be found. True 
4. List three of the six troubleshooting steps below.

Answer: Answers can include any three of the following:

1. Let the customer explain the problem.
2. Search for answers.
3. Develop a hypothesis.
4. Test your theory.
5. Resolve the problem and explain your changes to the customer.
6. Complete proper documentation

5. Describe how a floppy drive will behave if it is not plugged in correctly.

Answer: Correct answers can include either or both of the following descriptions:

1. The floppy drive light will maintain a solid color and the drive will not function properly.
2. They will not do anything at all. 

6. Write a hardware troubleshooting question (use any hardware component). There must be only one correct answer.
Answer: Answers will vary but must meet the described criteria.

Lab 8.4 Review Questions

1. Although PC problems vary, the methodology to troubleshooting tend to stay the same. True 
2. If a problem is detected during POST, the BIOS will normally return an error message. True 
3. If a problem is detected during POST, it is most likely software related. False
4. POST stands for ____________ _______ _______ _______. Answer: Power On Self Test
5. Describe the symptoms of an unplugged hard drive.
Answer: An unplugged hard drive will not function. Some of the symptoms may include:
§ The computer doesn’t boot
§ The BIOS reports an error for the hard drive
§ The hard drive is inaccessible.
6. Write a scenario question using the following information:

Allan the PC technician
Linda the customer
Amanda Senior technician 
Problem: Linda’s CMOS battery has failed. 

Your scenario question must involve all three characters, describe the symptoms of the CMOS problem, and have only one correct answer.

Answer: Answers will vary but must include the described criteria.

Lab 8.5 Review Questions

1. L1 cache and L2 cache are both housed within the CPU. False
2. L2 cache is housed inside the processor. False
3. CPU speed is measured in megahertz. True
4. The Nuts & Bolts software always uses a diagnostic card to test a PC’s components. False
5. The hard drive seek time is the amount of time it takes your hard drive to locate a particular data cluster and is normally measured in milliseconds. True 
4. Write a scenario question that utilizes the Nuts & Bolts software to identify a hardware problem with a computer. The answer to the question must include a description of how to use the diagnostic mode of the Nuts & Bolts software.

Answer: Answers will vary but must include the described criteria. 

Lab 8.6 Review Questions

1. All Windows 9x computer have only one Recycled directory. False
2. Using the Recycle Bin’s restore feature will return a file or directory to its original location. True
3. Undelete is included with the Windows 9x operating system. False
4. Undelete can only restore text files. True 
5. Why is it important to attempt file recovery immediately after a file is deleted?

Answer: The sooner the file recovery is attempt; the less likely it is to have been overwritten.
6. From the operating system’s perspective, briefly summarize the life cycle of MyFile.txt.

Answer: Answer should include the following steps:

1. The file was created.
2. The file was deleted in Windows (moved to the Recycle Bin).
3. The file was deleted (Recycle Bin was emptied).
4. The file was restored (Undelete command used to restore the file).

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