CompTIA A+® Certification All-In-One For Dummies®, 2nd Edition

5.12. Answers

1. A. A single sector on the disk is 512 bytes. A group of these sectors makes up a cluster, which typically could be 4K, 16K, or 32K. See "Sectors".

2. B. IDE supports only two devices in an IDE chain. EIDE improves on this limit by allowing four devices. Review "IDE/ATA standard".

3. D. The read/write heads are responsible for moving over the disk surface and writing data to the disk. A platter is one of the disk plates, a sector is where the data is written, and a cluster is a group of sectors. Check out "Read/write process".

4. B. The hard disk is connected to the motherboard with a 40-wire ribbon cable. A 34-wire ribbon cable is used to connect floppy drives, and a 50-wire ribbon cable is used for internal SCSI devices. Peruse "IDE cabling".

5. C. Devices at each end of the SCSI bus must be terminated. This is usually the SCSI host adapter plus the last device in the chain. Take a look at "Termination".

6. B. A bootable hard disk should take SCSI ID 0, and the host adapter usually takes an ID of 7. The other devices can be assigned any number in the chain as long as it is a unique number. Peek at "Addressing".

7. D. IDE CD-ROMs are slaves in an IDE chain. IDE devices do not get assigned IDs and do not have to be terminated. Look over "Master/slave configuration".

8. C. An internal SCSI connector uses a 50-wire ribbon cable, an IDE device uses a 40-wire ribbon cable, and a floppy drive uses a 34-wire ribbon cable. Study "SCSI cabling".

9. C. The master boot record is the first sector on the first ...