A particular element (row) of a relation is called a ________.

a) field
b) primary key
c) tuple
d) result set

c) tuple

Computer Science & Information Technology

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To assign a value 1 to variable x, you write

a. 1 = x; b. x = 1; c. x := 1; d. 1 := x; e. x == 1;

Computer Science & Information Technology

A principal factor contributing to the loss of the space shuttle Challenger was that

a. its payload was too heavy. b. there were no experienced astronauts on board. c. the weather in Florida was unusually cold. d. it was hit by lightning. e. NASA was experimenting with a new type of fuel.

Computer Science & Information Technology