WGU D427 Practice UPDATED ACTUAL
Exam Questions and CORRECT Answers
What is a datbase? - CORRECT ANSWER - A structured collection of data
Which component is responsible for executing instructions from the query processor? -
CORRECT ANSWER - Storage engine
The BETWEEN operator checks if a value is: - CORRECT ANSWER - Between an
inclusive range of two values
Which relationship involves a salesperson and products they sell? - CORRECT
ANSWER - Binary
What does the 'many' in a 1-M relationship imply? - CORRECT ANSWER - No exact
numerical limit but more than one
MySQL architecture is organized into how many layers? - CORRECT ANSWER - Four
In a unary relationship, what kind of relationship is described? - CORRECT ANSWER -A
relationship where an entity is related to itself
What does modality represent in an ER Diagram? - CORRECT ANSWER - The minimum
number of entity occurrences that can be involved in a relationship
Which storage media has the fastest access time? - CORRECT ANSWER - Main memory
(RAM)
Which of the following is NOT a characteristic of a database system? - CORRECT
ANSWER - Stores data in an unstructured format
, Which SQL command is used to delete a table? - CORRECT ANSWER - DROP TABLE
MySQL Workbench is designed for: - CORRECT ANSWER - Both database
administrators and users
What is a primary function of a Database Management System (DBMS)? - CORRECT
ANSWER - Managing database security and access
What is an associative entity? - CORRECT ANSWER - An entity that is used to represent
a many-to-many relationship with attributes
The IN operator is used in a WHERE clause to: - CORRECT ANSWER - Check if a value
matches any value in a list
What does CRUD stand for in the context of database operations? - CORRECT
ANSWER - Create, Read, Update, Delete
What is an entity in an ER model? - CORRECT ANSWER - A person, place, product,
concept, or activity
What does a unique attribute signify in ER modeling? - CORRECT ANSWER - An
attribute that identifies each entity instance uniquely
What is a composite attribute? - CORRECT ANSWER - An attribute that can be divided
into smaller parts, each representing a more basic attribute
Which of the following best represents a ternary relationship? - CORRECT ANSWER -A
relationship involving three different entity types
Exam Questions and CORRECT Answers
What is a datbase? - CORRECT ANSWER - A structured collection of data
Which component is responsible for executing instructions from the query processor? -
CORRECT ANSWER - Storage engine
The BETWEEN operator checks if a value is: - CORRECT ANSWER - Between an
inclusive range of two values
Which relationship involves a salesperson and products they sell? - CORRECT
ANSWER - Binary
What does the 'many' in a 1-M relationship imply? - CORRECT ANSWER - No exact
numerical limit but more than one
MySQL architecture is organized into how many layers? - CORRECT ANSWER - Four
In a unary relationship, what kind of relationship is described? - CORRECT ANSWER -A
relationship where an entity is related to itself
What does modality represent in an ER Diagram? - CORRECT ANSWER - The minimum
number of entity occurrences that can be involved in a relationship
Which storage media has the fastest access time? - CORRECT ANSWER - Main memory
(RAM)
Which of the following is NOT a characteristic of a database system? - CORRECT
ANSWER - Stores data in an unstructured format
, Which SQL command is used to delete a table? - CORRECT ANSWER - DROP TABLE
MySQL Workbench is designed for: - CORRECT ANSWER - Both database
administrators and users
What is a primary function of a Database Management System (DBMS)? - CORRECT
ANSWER - Managing database security and access
What is an associative entity? - CORRECT ANSWER - An entity that is used to represent
a many-to-many relationship with attributes
The IN operator is used in a WHERE clause to: - CORRECT ANSWER - Check if a value
matches any value in a list
What does CRUD stand for in the context of database operations? - CORRECT
ANSWER - Create, Read, Update, Delete
What is an entity in an ER model? - CORRECT ANSWER - A person, place, product,
concept, or activity
What does a unique attribute signify in ER modeling? - CORRECT ANSWER - An
attribute that identifies each entity instance uniquely
What is a composite attribute? - CORRECT ANSWER - An attribute that can be divided
into smaller parts, each representing a more basic attribute
Which of the following best represents a ternary relationship? - CORRECT ANSWER -A
relationship involving three different entity types
