Match the following terms to their meanings:
I. Data A. Facts that have been organized in a useful manner
II. Record B. Row of related data about an entity
III. Field C. A collection of related data about a particular topic or purpose
IV. Information D. Details about people, events, things, or ideas
V. Database E. A category of data in a column
D, B, E, A, C
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Answer the following statements true (T) or false (F)
1. It is useful to define a class for which no objects may be defined. 2. It is legal to have all member functions of a class be pure virtual functions. 3. A derived class destructor always invokes the base class destructor. 4. The base class destructor must be virtual. 5. This is legal code. ``` class B { public: // . . . virtual void f() = 0; }; int main() { B b1, b2; /*. . .*/ } ```
What does the acronym LED stand for?
A. Light Exchange Diagnostics B. Low Ethernet Distance C. Light Emitting Diode D. Later Ethernet Development