WGU - D426 Objective
Assessment 2026 Exam
Questions and Answers |
Already Graded A+
Database Application - ANSWER ✔✔Software that helps business
users interact with database systems.
Database Administrator - ANSWER ✔✔Responsible for securing the
database system against unauthorized users. A database administrator
enforces procedures for user access and database system availability.
Authorization - 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.
,Rules - ANSWER ✔✔Database systems ensure data is consistent
with structural and business rules.
Query Processor - 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.
Storage Manager - 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.
Transaction Manager - 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.
Metadata - ANSWER ✔✔Data about the database, such as column
names and the number of rows in each table.
Relational Database - ANSWER ✔✔Stores data in tables, columns,
and rows, similar to a spreadsheet.
, Relational Database - ANSWER ✔✔All _________ ________
systems support the SQL query language.
Relational Database - ANSWER ✔✔Relational systems are ideal for
databases that require an accurate record of every transaction, such as
banking, airline reservation systems, and student records.
MongoDB (NoSQL) - ANSWER ✔✔The newer non-relational systems
are called NoSQL, for 'not only SQL', and are optimized for big data.
SQL Statements - 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.
CREATE TABLE (Statement) - 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.
Data Type - ANSWER ✔✔INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
Assessment 2026 Exam
Questions and Answers |
Already Graded A+
Database Application - ANSWER ✔✔Software that helps business
users interact with database systems.
Database Administrator - ANSWER ✔✔Responsible for securing the
database system against unauthorized users. A database administrator
enforces procedures for user access and database system availability.
Authorization - 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.
,Rules - ANSWER ✔✔Database systems ensure data is consistent
with structural and business rules.
Query Processor - 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.
Storage Manager - 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.
Transaction Manager - 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.
Metadata - ANSWER ✔✔Data about the database, such as column
names and the number of rows in each table.
Relational Database - ANSWER ✔✔Stores data in tables, columns,
and rows, similar to a spreadsheet.
, Relational Database - ANSWER ✔✔All _________ ________
systems support the SQL query language.
Relational Database - ANSWER ✔✔Relational systems are ideal for
databases that require an accurate record of every transaction, such as
banking, airline reservation systems, and student records.
MongoDB (NoSQL) - ANSWER ✔✔The newer non-relational systems
are called NoSQL, for 'not only SQL', and are optimized for big data.
SQL Statements - 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.
CREATE TABLE (Statement) - 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.
Data Type - ANSWER ✔✔INT stores integer values.
DECIMAL stores fractional numeric values.
VARCHAR stores textual values.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
