WGU D430 Fundamentals of Information Security –
Complete 200 Practice Questions with Verified
Answers & Detailed Rationales | Latest 2026 Exam
Prep Test Bank
SECTION 1: CORE SECURITY PRINCIPLES & THE CIA
TRIAD
Question 1
What does the CIA triad represent in information
security?
A) Control, Integrity, Authentication
B) Confidentiality, Integrity, Availability
C) Cybersecurity, Internet, Access
D) Compliance, Identity, Authorization
Correct ☑VERIFIED ANSWER: B
Rationale: The CIA triad is the foundational model
of information security, representing Confidentiality,
Integrity, and Availability. Confidentiality ensures
data is only accessible to authorized individuals,
,Integrity ensures data is accurate and unaltered,
and Availability ensures data is accessible when
needed.
Question 2
Which of the following BEST defines confidentiality?
A) Ensuring data is always available
B) Ensuring data is not altered
C) Ensuring only authorized users can access data
D) Ensuring systems are fast
Correct ☑VERIFIED ANSWER: C
Rationale: Confidentiality protects information from
unauthorized access and disclosure. It ensures that
only those with proper permissions can view or
access sensitive information.
Question 3
Integrity in cybersecurity ensures that:
,A) Data is encrypted
B) Data is accessible
C) Data is accurate and unaltered
D) Users are authenticated
Correct ☑VERIFIED ANSWER: C
Rationale: Integrity ensures that data is not
modified improperly or tampered with. It
guarantees the accuracy, consistency, and
trustworthiness of data throughout its lifecycle.
Question 4
Availability means:
A) Data is hidden
B) Data is accessible when needed
C) Data is encrypted
D) Data is compressed
Correct ☑VERIFIED ANSWER: B
, Rationale: Availability ensures that systems and
data remain accessible to authorized users when
needed. This principle protects against denial-of-
service attacks and system failures.
Question 5
A system that provides proof of the integrity and
origin of data is said to provide:
A) Non-repudiation
B) Authentication
C) Authorization
D) Accounting
Correct ☑VERIFIED ANSWER: A
Rationale: Non-repudiation ensures that a party
cannot deny having performed a particular action,
typically through digital signatures and audit logs. It
provides proof of the integrity and origin of data.
Complete 200 Practice Questions with Verified
Answers & Detailed Rationales | Latest 2026 Exam
Prep Test Bank
SECTION 1: CORE SECURITY PRINCIPLES & THE CIA
TRIAD
Question 1
What does the CIA triad represent in information
security?
A) Control, Integrity, Authentication
B) Confidentiality, Integrity, Availability
C) Cybersecurity, Internet, Access
D) Compliance, Identity, Authorization
Correct ☑VERIFIED ANSWER: B
Rationale: The CIA triad is the foundational model
of information security, representing Confidentiality,
Integrity, and Availability. Confidentiality ensures
data is only accessible to authorized individuals,
,Integrity ensures data is accurate and unaltered,
and Availability ensures data is accessible when
needed.
Question 2
Which of the following BEST defines confidentiality?
A) Ensuring data is always available
B) Ensuring data is not altered
C) Ensuring only authorized users can access data
D) Ensuring systems are fast
Correct ☑VERIFIED ANSWER: C
Rationale: Confidentiality protects information from
unauthorized access and disclosure. It ensures that
only those with proper permissions can view or
access sensitive information.
Question 3
Integrity in cybersecurity ensures that:
,A) Data is encrypted
B) Data is accessible
C) Data is accurate and unaltered
D) Users are authenticated
Correct ☑VERIFIED ANSWER: C
Rationale: Integrity ensures that data is not
modified improperly or tampered with. It
guarantees the accuracy, consistency, and
trustworthiness of data throughout its lifecycle.
Question 4
Availability means:
A) Data is hidden
B) Data is accessible when needed
C) Data is encrypted
D) Data is compressed
Correct ☑VERIFIED ANSWER: B
, Rationale: Availability ensures that systems and
data remain accessible to authorized users when
needed. This principle protects against denial-of-
service attacks and system failures.
Question 5
A system that provides proof of the integrity and
origin of data is said to provide:
A) Non-repudiation
B) Authentication
C) Authorization
D) Accounting
Correct ☑VERIFIED ANSWER: A
Rationale: Non-repudiation ensures that a party
cannot deny having performed a particular action,
typically through digital signatures and audit logs. It
provides proof of the integrity and origin of data.
