A _____ shows how data moves through an information system but does not show program logic or processing steps.
A. data flow diagram
B. data tree diagram
C. data model diagram
D. data structure diagram
Answer: A
Computer Science & Information Technology
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A callback device
a. requires a user to dial-up and login b. calls the user back at a predetermined location c. is difficult to use when travelling to multiple locations d. all of the above
Computer Science & Information Technology
?A(n) _________, used by companies for internal memos and external letters, gives a work a consistent look and makes the job easier.
Fill in the blank(s) with the appropriate word(s).
Computer Science & Information Technology
Which type of server can function as a firewall?
a. Mail server b. Proxy server c. Print server d. FTP server
Computer Science & Information Technology
Which of the following XPath expressions for relative paths refers to the context node itself?
A. ?. B. ?.. C. ?.// D. ?../..
Computer Science & Information Technology