2-2 Quiz

What is database independence? Select one. Columns that align to form a vertical data order Rows and columns of a table that have no inherent order A database that can operate without a network Data sets that are in perfect symmetry

Rows and columns of a table that have no inherent order

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

True

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

True

NULL represents either "unknown" or "inapplicable." True False

True

Relational data is based on which three mathematical concepts? Select all that apply. A variable A domain A tuple A relation A table An equation

A domain A tuple A relation

Which of these answers are relational operations? Select all that apply. A join A boxed structure Projection Outer attachments Big data Selection

A join Projection Selection

In the relational data structure, which components are named? Data type, row, table Data type, table Data type, table, column

Data type, table, column

What is big data? Select one. Massive volumes of online data Algorithmic code that sifts through large amounts of information The product of an unregulated internet The future of systemic thinking

Massive volumes of online data

What are the components of a column? Name only Data type only Name and data type

Name and data type

Which of the following are SQL operators? Select all that apply. Arithmetic Variable False Upwards Comparison Logical

Arithmetic Comparison Logical