Related Questions

A data element in a record, that uniquely distinguishes the record, from all other records, is called
A response time
B Key
C System review
D test data
E None of the above
Consider a company that assembles computers. The probability of a faulty assembly of any computer is p. The company therefore subjects each computer to a testing process. This testing process gives the correct result for any computer with a probability of q. What is the probability of a computer being declared faulty?
A pq + (1 - p) (1 - q)
B (1 - q)p
C (1 - p)q
D pq
Before a disk drive can access any sector record, a computer program has to provide the record's disk address. What information does this address specify?
A Track number
B Sector number
C Surface number
D All of the above
E None of the above
The term _____ is sometimes used to refer to a data file in which all the records have the same record format, that is, the same field names, field lengths, and data types.
A Database
B Table
C Flat file
D Data structure
E None of the above
The files stored on a secondary stage device are composed of a hierarchy of data. What does a record in a file contain?
A Bits
B Characters
C Data field
D Schema
E None of the above
What is a type of virus that spreads itself, not just from file to file, but from computer to computer via e‐mail and other Internet traffic?
A Computer virus
B Worm
C Denial‐of‐service attack
D None of the above
The technique, for sharing the time of a computer among several jobs. Which switches jobs so rapidly such that each job appears to have the computer to itself:
A time sharing
B time out
C time domain
D FIFO
E None of the above
When storage space is scarce and physical records cannot span pages, creating multiple physical records from one logical relation will minimize wasted storage space.
A True
B False
Which of the following storage and retrieval methods would be well suited to your processing requirements if you only need to retrieve records one at a time and there is no fixed pattern to the requests for data and records?
A indexed sectors
B sequential
C direct
D indexed direct
E None of the above
Which of the following file organizations is most efficient for a file with a high degree of file activity?
A sequential
B ISAM
C VSAM
D B-Tree index
E All of the above

Next steps