Podcast
Questions and Answers
Which type of index determines the physical order of data rows in a table?
Which type of index determines the physical order of data rows in a table?
- B-tree index
- Hash index
- Bitmap index
- Clustered index (correct)
What is the purpose of an index in a database?
What is the purpose of an index in a database?
- To speed up data retrieval (correct)
- To identify relevant columns
- To store data in a separate structure
- To enforce uniqueness of values
What is the term used to refer to the columns on which an index is created?
What is the term used to refer to the columns on which an index is created?
- Clustered columns
- Unique columns
- Primary key columns
- Indexed columns (correct)
Which type of index can enforce the uniqueness of values in the indexed columns?
Which type of index can enforce the uniqueness of values in the indexed columns?
What are the trade-offs of using indexes in a database?
What are the trade-offs of using indexes in a database?
Which type of index provides a separate structure to map data in a table?
Which type of index provides a separate structure to map data in a table?
What is a primary key in a database?
What is a primary key in a database?
Which type of index is typically created on one or more columns of a table?
Which type of index is typically created on one or more columns of a table?
What is the purpose of a unique index in a database?
What is the purpose of a unique index in a database?
What determines the choice of index type in a database?
What determines the choice of index type in a database?
True or false: Indexes are used to speed up the retrieval of data from a table.
True or false: Indexes are used to speed up the retrieval of data from a table.
True or false: An index key is created on one or more columns of a table.
True or false: An index key is created on one or more columns of a table.
True or false: Indexes consume storage space and can slow down insert, update, and delete operations.
True or false: Indexes consume storage space and can slow down insert, update, and delete operations.
True or false: Non-clustered indexes determine the physical order of data rows in a table.
True or false: Non-clustered indexes determine the physical order of data rows in a table.
True or false: A primary key is a special type of unique index that enforces the uniqueness and non-null constraint on a table's primary key column(s).
True or false: A primary key is a special type of unique index that enforces the uniqueness and non-null constraint on a table's primary key column(s).
