WGU D426 V2 EXAM LATEST 2026 UPDATED QUESTIONS AND
VERIFIED 100% SOLUTIONS (2026/2027) |A+ GRADED
|GUARANTEED PASS
The relationship (within the relation) that describes how the value of one attribute may be
used to find the value of another attribute.
Functional Dependency
An attribute that can be used to find the value of another attribute in the relation.
Determinant
Value can be used to find the value of every other non-key attribute in the table. Unique and
minimal.
Candidate Key
Define & manage database structures
DDL
Adding, deleting, and modifying data - Manipulates data stored in a database.
DML
Used to create user accounts, manage permissions and access.
DCL
Includes CREATE, DROP, ALTER, TRUNCATE, RENAME
DDL
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
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, 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.
Query Processor
Link between tools and query processor
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VERIFIED 100% SOLUTIONS (2026/2027) |A+ GRADED
|GUARANTEED PASS
The relationship (within the relation) that describes how the value of one attribute may be
used to find the value of another attribute.
Functional Dependency
An attribute that can be used to find the value of another attribute in the relation.
Determinant
Value can be used to find the value of every other non-key attribute in the table. Unique and
minimal.
Candidate Key
Define & manage database structures
DDL
Adding, deleting, and modifying data - Manipulates data stored in a database.
DML
Used to create user accounts, manage permissions and access.
DCL
Includes CREATE, DROP, ALTER, TRUNCATE, RENAME
DDL
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
1|Page
, 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.
Query Processor
Link between tools and query processor
2|Page
