WGU D450 Community Health And Population-
Focused Nursing OA Exam 1 QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2026 2025/2026 Q&A | Instant
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Core Domains Covered:
• Epidemiology & Disease Prevention (14 questions)
• Community Health Assessment & Planning (12 questions)
• Population-Focused Interventions (12 questions)
• Healthcare Systems & Policy (10 questions)
• Case Management & Care Coordination (10 questions)
• Health Promotion & Education (10 questions)
• Vulnerable Populations & Health Disparities (10 questions)
• Program Evaluation & Quality Improvement (8 questions)
• Disaster Preparedness & Public Health Emergencies (9 questions)
EPIDEMIOLOGY & DISEASE PREVENTION
Question 1:
A nurse is developing a program to reduce obesity in a community. Which level of
prevention is this?
A. Tertiary prevention
B. Secondary prevention
C. Primary prevention
D. Restorative prevention
Answer: C. Primary prevention
, Rationale: Primary prevention aims to prevent disease before it occurs.
Obesity prevention programs that promote healthy eating and physical activity are
primary prevention strategies.
Question 2:
A nurse is using the epidemiological triangle to understand disease causation.
What does this diagram include?
A. Host, Environment, Provider
B. Host, Agent, Environment
C. Person, Place, Time
D. Risk, Exposure, Disease
Answer: B. Host, Agent, Environment
Rationale: The epidemiological triangle consists of host, agent, and
environment. It is used to understand disease causation and guide public health
interventions.
Question 3:
A community health nurse is screening for tuberculosis. This is an example of
which level of prevention?
A. Primary
B. Secondary
C. Tertiary
D. Quaternary
Answer: B. Secondary
Rationale: Secondary prevention focuses on early disease detection and
intervention, like screening for TB. It aims to identify disease at an early stage
when treatment is most effective.
Question 4:
Which of the following is an example of tertiary prevention?
,A. Teaching healthy eating habits
B. Rehabilitation after a stroke
C. Screening for hypertension
D. Immunizations
Answer: B. Rehabilitation after a stroke
Rationale: Tertiary prevention focuses on rehabilitation and reducing
complications after disease has occurred. Stroke rehabilitation is a classic example
of tertiary prevention.
Question 5:
A nurse is investigating a foodborne illness outbreak. What is the first action?
A. Treat affected individuals
B. Notify the local health department
C. Collect food samples
D. Write a report
Answer: B. Notify the local health department
Rationale: Outbreaks must be reported promptly to public health authorities
for investigation and control. This is a legal and professional responsibility.
Question 6:
What is the primary goal of Healthy People 2030?
A. Increase private insurance enrollment
B. Improve health and reduce health disparities
C. Reduce healthcare costs
D. Expand hospital services
Answer: B. Improve health and reduce health disparities
Rationale: Healthy People 2030 promotes health and well-being and aims to
eliminate health disparities among all populations.
, Question 7:
A nurse is studying the incidence of a disease. Which statement best describes
incidence?
A. The number of new cases of a disease in a population during a specific time
period
B. The total number of cases of a disease in a population at a given time
C. The number of deaths from a disease in a population
D. The number of people at risk for a disease
Answer: A. The number of new cases of a disease in a population during a
specific time period
Rationale: Incidence measures the number of new cases of a disease in a
population during a specific time period. Prevalence measures total cases at a given
time.
Question 8:
A nurse is assessing the prevalence of diabetes in a community. Which of the
following describes prevalence?
A. The total number of cases of a disease in a population at a given time
B. The number of new cases diagnosed in the past year
C. The number of deaths due to the disease
D. The number of people at risk for the disease
Answer: A. The total number of cases of a disease in a population at a
given time
Rationale: Prevalence is the total number of cases (both new and existing) in a
population at a given time. It provides a snapshot of disease burden.
Question 9:
Which of the following is a modifiable risk factor for cardiovascular disease?
A. Age
B. Gender
Focused Nursing OA Exam 1 QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2026 2025/2026 Q&A | Instant
Download PDF
Core Domains Covered:
• Epidemiology & Disease Prevention (14 questions)
• Community Health Assessment & Planning (12 questions)
• Population-Focused Interventions (12 questions)
• Healthcare Systems & Policy (10 questions)
• Case Management & Care Coordination (10 questions)
• Health Promotion & Education (10 questions)
• Vulnerable Populations & Health Disparities (10 questions)
• Program Evaluation & Quality Improvement (8 questions)
• Disaster Preparedness & Public Health Emergencies (9 questions)
EPIDEMIOLOGY & DISEASE PREVENTION
Question 1:
A nurse is developing a program to reduce obesity in a community. Which level of
prevention is this?
A. Tertiary prevention
B. Secondary prevention
C. Primary prevention
D. Restorative prevention
Answer: C. Primary prevention
, Rationale: Primary prevention aims to prevent disease before it occurs.
Obesity prevention programs that promote healthy eating and physical activity are
primary prevention strategies.
Question 2:
A nurse is using the epidemiological triangle to understand disease causation.
What does this diagram include?
A. Host, Environment, Provider
B. Host, Agent, Environment
C. Person, Place, Time
D. Risk, Exposure, Disease
Answer: B. Host, Agent, Environment
Rationale: The epidemiological triangle consists of host, agent, and
environment. It is used to understand disease causation and guide public health
interventions.
Question 3:
A community health nurse is screening for tuberculosis. This is an example of
which level of prevention?
A. Primary
B. Secondary
C. Tertiary
D. Quaternary
Answer: B. Secondary
Rationale: Secondary prevention focuses on early disease detection and
intervention, like screening for TB. It aims to identify disease at an early stage
when treatment is most effective.
Question 4:
Which of the following is an example of tertiary prevention?
,A. Teaching healthy eating habits
B. Rehabilitation after a stroke
C. Screening for hypertension
D. Immunizations
Answer: B. Rehabilitation after a stroke
Rationale: Tertiary prevention focuses on rehabilitation and reducing
complications after disease has occurred. Stroke rehabilitation is a classic example
of tertiary prevention.
Question 5:
A nurse is investigating a foodborne illness outbreak. What is the first action?
A. Treat affected individuals
B. Notify the local health department
C. Collect food samples
D. Write a report
Answer: B. Notify the local health department
Rationale: Outbreaks must be reported promptly to public health authorities
for investigation and control. This is a legal and professional responsibility.
Question 6:
What is the primary goal of Healthy People 2030?
A. Increase private insurance enrollment
B. Improve health and reduce health disparities
C. Reduce healthcare costs
D. Expand hospital services
Answer: B. Improve health and reduce health disparities
Rationale: Healthy People 2030 promotes health and well-being and aims to
eliminate health disparities among all populations.
, Question 7:
A nurse is studying the incidence of a disease. Which statement best describes
incidence?
A. The number of new cases of a disease in a population during a specific time
period
B. The total number of cases of a disease in a population at a given time
C. The number of deaths from a disease in a population
D. The number of people at risk for a disease
Answer: A. The number of new cases of a disease in a population during a
specific time period
Rationale: Incidence measures the number of new cases of a disease in a
population during a specific time period. Prevalence measures total cases at a given
time.
Question 8:
A nurse is assessing the prevalence of diabetes in a community. Which of the
following describes prevalence?
A. The total number of cases of a disease in a population at a given time
B. The number of new cases diagnosed in the past year
C. The number of deaths due to the disease
D. The number of people at risk for the disease
Answer: A. The total number of cases of a disease in a population at a
given time
Rationale: Prevalence is the total number of cases (both new and existing) in a
population at a given time. It provides a snapshot of disease burden.
Question 9:
Which of the following is a modifiable risk factor for cardiovascular disease?
A. Age
B. Gender
