____ help you focus your attention on specific aspects of the project based on different criteria.

Hard disks are optical disks.

a. true b. false

________ typically are used when the sequence in which records are to be processed can be anticipated; ________ generally are used when the sequence in which records are to be processed cannot be anticipated.

a) Queued access methods, basic access methods b) Sequential access methods, basic access methods c) Basic access methods, queued access methods d) Basic access methods, sequential access methods