Questions 4) CompTIA’s A+ Core Hardware Exam

Posted on
Like what you see? Share it.Share on Google+Share on LinkedInShare on FacebookShare on RedditTweet about this on TwitterEmail this to someone

Objective: Diagnosing and Troubleshooting
SubObjective: Recognize common problems associated with each module and their symptoms, and identify steps to isolate and troubleshoot the problems. Given a problem situation, interpret the symptoms and infer the most likely cause.
Single Answer Multiple Choice

 

You are installing an Ultra3 SCSI hard drive onto an existing SCSI chain. The bus is an Ultra2 SCSI bus. You set the SCSI ID, then install the drive with a 50-pin to 68-pin adapter on one end. When you reboot the machine, none of the SCSI devices are working properly. What must you do to correct the problem?

 

A. Install an Ultra3 SCSI terminator onto the hard drive.
B. Install an Ultra2 SCSI terminator onto the hard drive.
C. Replace the 50-pin to 68-pin adapter with a 68-pin to 50-pin adapter.
D. Replace the 50-pin to 68-pin adapter with a 50-pin to 40-pin adapter.

 

Answer:
B. Install an Ultra2 SCSI terminator onto the hard drive.

 

Tutorial:
In order for a SCSI bus to work properly, you must terminate it at both ends. Otherwise, signals on the bus will bounce back and forth on the bus and disrupt proper communications. The terminator must match the bus, not the device, so in this scenario it will have to be an Ultra2 SCSI terminator. You will also need an adapter on the other end of the drive to adapt the 68-pin Ultra3 device connector to the 50-pin Ultra2 terminator.

 

The 50-pin to 68-pin adapter that connects the Ultra2 bus to the Ultra3 SCSI device should not be changed. It is the correct adapter to use. 40-pin connectors are used on IDE devices, not SCSI devices.

Reference:

 

1. A+ Training Guide – Installing Disk Devices
– Small Computer System Interface – SCSI Termination

 

These questions are derived from the Self Test Software Practice Test for CompTIA Exam #220-301: A+ 2003 Core Hardware.

Like what you see? Share it.Share on Google+Share on LinkedInShare on FacebookShare on RedditTweet about this on TwitterEmail this to someone
cmadmin

ABOUT THE AUTHOR

Posted in Archive|

Comment: