WGU - D426 Objective Assessment 150+ (Latest Edition) 100% Verified Q&A + Answer Key Solutions

WGU - D426: OBJECTIVE
ASSESSMENT

150+ (Latest 2025-2026 Edition) 100%
Verified Q&A + Answer Key Solutions


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,Question 1
Database Application
Correct Answer
Software that helps business users interact with database systems.

Question 2
Database Administrator
Correct Answer
Responsible for securing the database system against unauthorized users. A database administrator enforces
procedures for user access and database system availability.

Question 3
Authorization
Correct Answer
Many database users should have limited access to specific tables, columns, or rows of a database. Database
systems authorize individual users to access specific data.

Question 4
Rules
Correct Answer
Database systems ensure data is consistent with structural and business rules.

Question 5
Query Processor
Correct Answer
Interprets queries, creates a plan to modify the database or retrieve data, and returns query results to the
application. Performs query optimization to ensure the most efficient instructions are executed on the data.

Question 6
Storage Manager
Correct Answer
Translates the query processor instructions into low-level file-system commands that modify or retrieve data.
Database sizes range from megabytes to many terabytes, so the storage manager uses indexes to quickly locate
data.

Question 7
Transaction Manager
Correct Answer
Ensures transactions are properly executed. The transaction manager prevents conflicts between concurrent
transactions. The transaction manager also restores the database to a consistent state in the event of a transaction
or system failure.


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, Question 8
Metadata
Correct Answer
Data about the database, such as column names and the number of rows in each table.

Question 9
Relational Database
Correct Answer
Stores data in tables, columns, and rows, similar to a spreadsheet.


Question 10
Relational Database
Correct Answer
All _________ ________ systems support the SQL query language.

Question 11
Relational Database
Correct Answer
Relational systems are ideal for databases that require an accurate record of every transaction, such as banking,
airline reservation systems, and student records.

Question 12
MongoDB (NoSQL)
Correct Answer
The newer non-relational systems are called NoSQL, for 'not only SQL', and are optimized for big data.

Question 13
SQL Statements
Correct Answer
INSERT inserts rows into a table.
SELECT retrieves data from a table.
UPDATE modifies data in a table.
DELETE deletes rows from a table.

Question 14
CREATE TABLE (Statement)
Correct Answer
A statement that creates a new table by specifying the table and column names. Each column is assigned a data type
that indicates the format of column values. Data types can be numeric, textual, or complex.




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