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WGU D426 2026 PRACTICE TEST EXAM
COMPLETE QUESTIONS AND DETAILED
CORRECT (EXPERT VERIFIED)
ANSWERS/TOP-RATED A+.
WGU D426
Maximize your success on the WGU D426 (likely Data
Management or a similar IT course) Practice Test with focused
preparation that strengthens your understanding of database
design, SQL queries, data modeling, and foundational data
management principles. It is specifically designed for WGU
students to gauge their readiness and build proficiency in
essential data management skills
A ____ index stores column values and row pointers in a
hierarchy. The bottom level of the hierarchy in a multi-level
index is a sorted single-level index. The bottom level is
sparse for primary indexes, or dense for secondary indexes.
....... ANSWER ....... ✓ ✓ Multi-Level
The bottom level of the hierarchy in a multi-level index is a
____ index. ....... ANSWER ....... ✓ ✓ Sorted Single Level
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Each level above the bottom in a multi-level index is a ____
sorted index to the level below. ....... ANSWER ....... ✓ ✓
Sparse
The top level of a multi-level index always fits in ____. .......
ANSWER ....... ✓ ✓ One Block
The number of index entries per block is called the ____ of a
multi-level index. ....... ANSWER ....... ✓ ✓ Fan-Out
Each path from the top-level block to a bottom-level block is
called a ____. ....... ANSWER ....... ✓ ✓ Branch
In a ____ index, index entries are assigned to buckets. .......
ANSWER ....... ✓ ✓ Hash
A index is a grid of bits ....... ANSWER ....... ✓ ✓ Bitmap
A ____ is a database object that maps one or more tables to
a single file. ....... ANSWER ....... ✓ ✓ tablespace
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A ____ or ____ translates instructions generated by a query
processor into low-level commands that access data on
storage media. ....... ANSWER ....... ✓ ✓ Storage Engine,
Storage Manager
A Record Consists of ____ ....... ANSWER ....... ✓ ✓ a set
of one or more fields
A DBMS performs several important functions that
guarantee the integrity and consistency of the data in the
database by performing ....... ANSWER ....... ✓ ✓ Data
Integrity Management, Data Storage Management, Security
Management
Data is/are ____ ....... ANSWER ....... ✓ ✓ Raw Facts
Database Models were developed to ____ ....... ANSWER
....... ✓ ✓ Model Real world events or conditions
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What type of relationship is expressed with the phrase "A
Painter Paints one or more Paintings"? ....... ANSWER .......
✓ ✓ 1:M
The entity integrity rule requires that ____ ....... ANSWER
....... ✓ ✓ All primary keys are Unique
What does the 'refer' in referential integrity mean? .......
ANSWER ....... ✓ ✓ A foreign key in a table must refer to a
valid primary key in another table
A table is perceived as a ____ ....... ANSWER ....... ✓ ✓
Two-Dimensional Structure
Another word for the term relation is ____ ....... ANSWER
....... ✓ ✓ Table
A table is logically connected to another table by defining a
____ ....... ANSWER ....... ✓ ✓ Common Attribute
WGU D426 2026 PRACTICE TEST EXAM
COMPLETE QUESTIONS AND DETAILED
CORRECT (EXPERT VERIFIED)
ANSWERS/TOP-RATED A+.
WGU D426
Maximize your success on the WGU D426 (likely Data
Management or a similar IT course) Practice Test with focused
preparation that strengthens your understanding of database
design, SQL queries, data modeling, and foundational data
management principles. It is specifically designed for WGU
students to gauge their readiness and build proficiency in
essential data management skills
A ____ index stores column values and row pointers in a
hierarchy. The bottom level of the hierarchy in a multi-level
index is a sorted single-level index. The bottom level is
sparse for primary indexes, or dense for secondary indexes.
....... ANSWER ....... ✓ ✓ Multi-Level
The bottom level of the hierarchy in a multi-level index is a
____ index. ....... ANSWER ....... ✓ ✓ Sorted Single Level
, Page 2 of 57
Each level above the bottom in a multi-level index is a ____
sorted index to the level below. ....... ANSWER ....... ✓ ✓
Sparse
The top level of a multi-level index always fits in ____. .......
ANSWER ....... ✓ ✓ One Block
The number of index entries per block is called the ____ of a
multi-level index. ....... ANSWER ....... ✓ ✓ Fan-Out
Each path from the top-level block to a bottom-level block is
called a ____. ....... ANSWER ....... ✓ ✓ Branch
In a ____ index, index entries are assigned to buckets. .......
ANSWER ....... ✓ ✓ Hash
A index is a grid of bits ....... ANSWER ....... ✓ ✓ Bitmap
A ____ is a database object that maps one or more tables to
a single file. ....... ANSWER ....... ✓ ✓ tablespace
, Page 3 of 57
A ____ or ____ translates instructions generated by a query
processor into low-level commands that access data on
storage media. ....... ANSWER ....... ✓ ✓ Storage Engine,
Storage Manager
A Record Consists of ____ ....... ANSWER ....... ✓ ✓ a set
of one or more fields
A DBMS performs several important functions that
guarantee the integrity and consistency of the data in the
database by performing ....... ANSWER ....... ✓ ✓ Data
Integrity Management, Data Storage Management, Security
Management
Data is/are ____ ....... ANSWER ....... ✓ ✓ Raw Facts
Database Models were developed to ____ ....... ANSWER
....... ✓ ✓ Model Real world events or conditions
, Page 4 of 57
What type of relationship is expressed with the phrase "A
Painter Paints one or more Paintings"? ....... ANSWER .......
✓ ✓ 1:M
The entity integrity rule requires that ____ ....... ANSWER
....... ✓ ✓ All primary keys are Unique
What does the 'refer' in referential integrity mean? .......
ANSWER ....... ✓ ✓ A foreign key in a table must refer to a
valid primary key in another table
A table is perceived as a ____ ....... ANSWER ....... ✓ ✓
Two-Dimensional Structure
Another word for the term relation is ____ ....... ANSWER
....... ✓ ✓ Table
A table is logically connected to another table by defining a
____ ....... ANSWER ....... ✓ ✓ Common Attribute
