DAD 220 4 2 LAB CARDINALITY AND
TARGETED DATA EXAM SCRIPT SOLVED
QUESTIONS AND CORRECT ANSWERS
GRADED A+
◉ Relational Model. Answer: A model based on mathematical
principle.
1. A data structure that prescribes how data is organized
2. Operations that manipulate data structures
3. Rules that govern valid relational data
◉ Domain. Answer: A named set of possible database values, such as
integers, dictionary words, or logical values
◉ Tuple. Answer: A finite sequence of values, each drawn from a
fixed domain. Ex: (3, apple, True)
◉ Relation. Answer: A named set of tuples, all drawn from the same
sequence of domains
◉ Attribute. Answer: Each tuple position is called an attribute and
given a unique name
TARGETED DATA EXAM SCRIPT SOLVED
QUESTIONS AND CORRECT ANSWERS
GRADED A+
◉ Relational Model. Answer: A model based on mathematical
principle.
1. A data structure that prescribes how data is organized
2. Operations that manipulate data structures
3. Rules that govern valid relational data
◉ Domain. Answer: A named set of possible database values, such as
integers, dictionary words, or logical values
◉ Tuple. Answer: A finite sequence of values, each drawn from a
fixed domain. Ex: (3, apple, True)
◉ Relation. Answer: A named set of tuples, all drawn from the same
sequence of domains
◉ Attribute. Answer: Each tuple position is called an attribute and
given a unique name