Which of the following operators takes a Boolean expression and reverses its logical value?

a. Xor
b. And
c. <>
d. Not


d. Not

Computer Science & Information Technology

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In a database that contains tables with information about students in a university, which of the following should be the primary key?

a. the students' last names b. the students' full names c. the students' college identification numbers d. any of the above would be good primary keys

Computer Science & Information Technology

Layout options are used to control the way that text wraps around a picture or object

Indicate whether the statement is true or false

Computer Science & Information Technology

____ is the difference between the darkest and lightest areas of an image.

A. Contrast B. Color C. Style D. Brightness

Computer Science & Information Technology

The plain old telephone service is a good example of what kind of WAN technology?

A. packet switched B. leased line C. VPN over Internet D. circuit switched

Computer Science & Information Technology