WGU D426 Data Management Foundations
Objective Assessment | V2 | Questions and
Answers | 2026 Update | 100% Correct.
A view created and stored on the database. Underlying data is changed and also
updated in this view. Uses memory space.
Materialized View
Not stored in memory. Only computed when used or accessed.
Virtual View
The data about the data. Describes elements such as columns, names, and data type.
Metadata
Ordered collection of elements in parentheses.
Tuple
% of table rows selected by a query
Hit Ration
Reads blocks directly, without accessing an index.
Table Scan
Reads index blocks sequentially in order to locate the needed table blocks.
, Index Scan
Database repeatedly splits the index in two until it finds a match.
Binary Search
Database object that maps one or more tables to a single file.
Tablespace
Specifies tables, columns, and keys. Implements database requirements in a specific
database system. Also called a schema.
Logical Design
Specifies indexes, table structures, and partitions. Specifies how tables are organized
on storage media.
Physical Design
Components of a computer system and the relationships between components.
Architecture
Interact directly with database users and administrators and send queries to the query
processor. Includes Connectors & APIs, Workbench, and utility programs.
Tools
Interprets queries. Compiles queries into low-level instructions for the storage engine.
Creates a plan to modify the database or retrieve data, and returns query results to the
application.
Objective Assessment | V2 | Questions and
Answers | 2026 Update | 100% Correct.
A view created and stored on the database. Underlying data is changed and also
updated in this view. Uses memory space.
Materialized View
Not stored in memory. Only computed when used or accessed.
Virtual View
The data about the data. Describes elements such as columns, names, and data type.
Metadata
Ordered collection of elements in parentheses.
Tuple
% of table rows selected by a query
Hit Ration
Reads blocks directly, without accessing an index.
Table Scan
Reads index blocks sequentially in order to locate the needed table blocks.
, Index Scan
Database repeatedly splits the index in two until it finds a match.
Binary Search
Database object that maps one or more tables to a single file.
Tablespace
Specifies tables, columns, and keys. Implements database requirements in a specific
database system. Also called a schema.
Logical Design
Specifies indexes, table structures, and partitions. Specifies how tables are organized
on storage media.
Physical Design
Components of a computer system and the relationships between components.
Architecture
Interact directly with database users and administrators and send queries to the query
processor. Includes Connectors & APIs, Workbench, and utility programs.
Tools
Interprets queries. Compiles queries into low-level instructions for the storage engine.
Creates a plan to modify the database or retrieve data, and returns query results to the
application.
