Which one of the following statements is true about primary keys?

(A) A column of names is usually a good choice for use as a primary key.
(B) Only a single record can be used as a primary key.
(C) Social Security numbers are never used as a primary key.
(D) A primary key is used to uniquely identify records in a table.


(D) A primary key is used to uniquely identify records in a table.

Computer Science & Information Technology

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The value of the expression 20.0 * (9.0/5) + 32.0 is

a. 68.0 b. 52.0 c. expression has a syntax error so there is no value d. 32.0 e. an incorrect expression, the / should be %

Computer Science & Information Technology

A group of related tables is called a(n) ________ database

Fill in the blank(s) with correct word

Computer Science & Information Technology

There is no difference in a residential and a commercial lease.

Answer the following statement true (T) or false (F)

Computer Science & Information Technology

Which of the following is true of a Webinar?

a. It automatically delivers to subscribers the updated posts from their favorite blogs with limited one-way communication. b. It is a live Internet presentation that supports interactive communications between the presenter and the audience. c. It provides a set of tools to report project status. d. It determines the resource availability and schedule rooms for meetings over the internet.

Computer Science & Information Technology