DAD_220_-_2-2_QUIZ

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Southern New Hampshire University *

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220

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Computer Science

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Apr 3, 2024

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5

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Question 1 2 / 2 points Relational data is based on which three mathematical concepts? Select all that apply. A variable ~ | Adomain ~ | Atuple ~ | Arelation A table An equation w Hide question 1 feedback The relational data structure is based on a domain, a tuple, and a relation. Question 2 2 / 2 points Which of these answers are relational operations? Select all that apply. ~ Ajoin A boxed structure ~ Projection Outer attachments Big data ~ Selection w Hide question 2 feedback Relational operations include a join, a projection, and selection.
Question 3 2 / 2 points In relational databases, each individual space within a row or column contains exactly one value. e True False w Hide question 3 feedback In relational databases, each individual space contains exactly one value. Question 4 2 / 2 points A table must have at least one column and any number of rows. A table without rows is called an empty table. o True False w Hide question 4 feedback A table without rows is called an empty table.
Question 5 2 / 2 points What is database independence? Select one. Data sets that are in perfect symmetry Columns that align to form a vertical data order e Rows and columns of a table that have no inherent order A database that can operate without a network w Hide question 5 feedback Database independence is rows and columns of a table that have no inherent order. Question 6 2 / 2 points Which of the following are SQL operators? Select all that apply. v | Arithmetic Variable False Upwards ~ Comparison ~ Logical w Hide question 6 feedback Arithmetic, comparison, and logical are all SQL operators.
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Question 7 NULL represents either "unknown" or "inapplicable." o True False w Hide question 7 feedback NULL represents either "unknown" or "inapplicable. Question 8 What is big data? Select one. e Massive volumes of online data The product of an unregulated internet Algorithmic code that sifts through large amounts of information The future of systemic thinking w Hide question 8 feedback Big data is massive volumes of online data. Question 9 In the relational data structure, which components are named? Data type, row, table Data type, table e Data type, table, column Question 10 What are the components of a column? Name only Data type only o Name and data type 2 / 2 points 2 / 2 points 2 / 2 points 2 / 2 points

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