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Dad 220 4 2 Lab Cardinality And Targeted Data Actual Questions And Verified Answers Exam Prep

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DAD 220 4 2 LAB CARDINALITY AND TARGETED DATA ACTUAL QUESTIONS AND VERIFIED ANSWERS EXAM PREP

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DAD 220 4 2 LAB CARDINALITY AND
TARGETED DATA ACTUAL QUESTIONS AND
VERIFIED ANSWERS EXAM PREP


◉ Relational data is based on which three mathematical concepts?
Select all that apply.


Question options:
A variable
A domain
A tuple
A relation
A table
An equation. Answer: A domain
A tuple
A relation


◉ Which of these answers are relational operations? Select all that
apply.


Question options:
A join

, A boxed structure
Projection
Outer attachments
Big data
Selection. Answer: A join
Projection
Selection


◉ In relational databases, each individual space within a row or
column contains exactly one value.


Question options:
True
False. Answer: True


◉ A table must have at least one column and any number of rows. A
table without rows is called an empty table.


Question options:
True
False. Answer: True


◉ What is database independence? Select one.

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