WGU D450 Population-Focused Nursing OA: 116
Practice Questions & Answers with Detailed
Rationales | Latest Update2026-2028 | Instant
Download Pdf
Exam Overview
Feature Detail
Course D450 / NURS 3123
Code
Format Multiple-choice, proctored online
Time Approximately 3 hours
Allowed
Passing Pass/No Pass (WGU mastery model)
Domains Epidemiology, health promotion, community assessment, vulnerable
Tested populations, environmental health, healthcare policy
Section 1: Community Health Foundations & Epidemiology (Questions 1–20)
1. What is the primary distinction between community-based and community-
oriented nursing?
A) Community-based nursing focuses on individuals, while community-oriented nursing
focuses on populations
B) Community-based nursing requires an advanced degree
C) Community-oriented nursing provides direct clinical care
D) They are identical terms
Answer: A
,Rationale: Community-based nursing focuses on "illness care" of individuals and
families; community-oriented nursing emphasizes health protection, promotion, and disease
prevention for populations .
2. A community health nurse is analyzing data on birth rates, death rates, and
marriage rates. This type of data is classified as:
A) Health assets
B) Sociocultural factors
C) Demographic data
D) Vital statistics
Answer: D
Rationale: Vital statistics include data on births, deaths, marriages, and divorces—
essential sources for community health assessment .
3. The core public health function of "Assurance" is best described as:
A) Monitoring health status to identify community health problems
B) Enforcing laws and regulations that protect health
C) Ensuring the provision of services to those in need, either directly or through partnership
D) Diagnosing and investigating health problems in the community
Answer: C
Rationale: Assurance ensures necessary health services are available and accessible.
Assessment involves data collection, and policy development creates programs .
4. A nurse is analyzing data from a community health survey to identify the most
pressing health needs. This activity aligns with which core public health function?
A) Assurance
B) Assessment
C) Policy development
D) Outreach
,Answer: B
Rationale: Assessment involves systematic data collection and analysis to determine
population health status .
5. A public health nurse ensures that a community has access to essential health
services, including immunizations and prenatal care. This is an example of:
A) Assessment
B) Policy development
C) Outreach
D) Assurance
Answer: D
Rationale: Assurance is the public health function that guarantees necessary services
are available and accessible to the population .
6. A community health nurse is developing a policy to address childhood obesity
based on data collected from school health screenings. This activity aligns with
which core public health function?
A) Assessment
B) Policy development
C) Assurance
D) Evaluation
Answer: B
Rationale: Policy development involves using assessment data to create evidence-
based programs and policies to address identified health needs .
7. A nurse calculates the number of new cases of tuberculosis in a city during the
past year. This measure is the:
A) Incidence rate
B) Prevalence rate
, C) Mortality rate
D) Attack rate
Answer: A
Rationale: Incidence measures new cases developing in a population during a
specified time period. Prevalence includes all existing cases .
8. Which epidemiological measure indicates the proportion of a population with a
disease at a specific point in time?
A) Incidence rate
B) Mortality rate
C) Prevalence rate
D) Attack rate
Answer: C
Rationale: Prevalence includes all existing cases (new and old) at a given point or
period. Incidence only counts new cases .
9. A screening test correctly identifies 95% of individuals who do not have the
disease. This describes the test's:
A) Sensitivity
B) Specificity
C) Positive predictive value
D) Reliability
Answer: B
Rationale: Specificity is the ability of a test to correctly identify those without the
disease (true negatives). Sensitivity correctly identifies those with the disease (true
positives) .
10. In the Epidemiological Triangle model, a community health nurse investigating a
salmonella outbreak would consider the contaminated food as the:
Practice Questions & Answers with Detailed
Rationales | Latest Update2026-2028 | Instant
Download Pdf
Exam Overview
Feature Detail
Course D450 / NURS 3123
Code
Format Multiple-choice, proctored online
Time Approximately 3 hours
Allowed
Passing Pass/No Pass (WGU mastery model)
Domains Epidemiology, health promotion, community assessment, vulnerable
Tested populations, environmental health, healthcare policy
Section 1: Community Health Foundations & Epidemiology (Questions 1–20)
1. What is the primary distinction between community-based and community-
oriented nursing?
A) Community-based nursing focuses on individuals, while community-oriented nursing
focuses on populations
B) Community-based nursing requires an advanced degree
C) Community-oriented nursing provides direct clinical care
D) They are identical terms
Answer: A
,Rationale: Community-based nursing focuses on "illness care" of individuals and
families; community-oriented nursing emphasizes health protection, promotion, and disease
prevention for populations .
2. A community health nurse is analyzing data on birth rates, death rates, and
marriage rates. This type of data is classified as:
A) Health assets
B) Sociocultural factors
C) Demographic data
D) Vital statistics
Answer: D
Rationale: Vital statistics include data on births, deaths, marriages, and divorces—
essential sources for community health assessment .
3. The core public health function of "Assurance" is best described as:
A) Monitoring health status to identify community health problems
B) Enforcing laws and regulations that protect health
C) Ensuring the provision of services to those in need, either directly or through partnership
D) Diagnosing and investigating health problems in the community
Answer: C
Rationale: Assurance ensures necessary health services are available and accessible.
Assessment involves data collection, and policy development creates programs .
4. A nurse is analyzing data from a community health survey to identify the most
pressing health needs. This activity aligns with which core public health function?
A) Assurance
B) Assessment
C) Policy development
D) Outreach
,Answer: B
Rationale: Assessment involves systematic data collection and analysis to determine
population health status .
5. A public health nurse ensures that a community has access to essential health
services, including immunizations and prenatal care. This is an example of:
A) Assessment
B) Policy development
C) Outreach
D) Assurance
Answer: D
Rationale: Assurance is the public health function that guarantees necessary services
are available and accessible to the population .
6. A community health nurse is developing a policy to address childhood obesity
based on data collected from school health screenings. This activity aligns with
which core public health function?
A) Assessment
B) Policy development
C) Assurance
D) Evaluation
Answer: B
Rationale: Policy development involves using assessment data to create evidence-
based programs and policies to address identified health needs .
7. A nurse calculates the number of new cases of tuberculosis in a city during the
past year. This measure is the:
A) Incidence rate
B) Prevalence rate
, C) Mortality rate
D) Attack rate
Answer: A
Rationale: Incidence measures new cases developing in a population during a
specified time period. Prevalence includes all existing cases .
8. Which epidemiological measure indicates the proportion of a population with a
disease at a specific point in time?
A) Incidence rate
B) Mortality rate
C) Prevalence rate
D) Attack rate
Answer: C
Rationale: Prevalence includes all existing cases (new and old) at a given point or
period. Incidence only counts new cases .
9. A screening test correctly identifies 95% of individuals who do not have the
disease. This describes the test's:
A) Sensitivity
B) Specificity
C) Positive predictive value
D) Reliability
Answer: B
Rationale: Specificity is the ability of a test to correctly identify those without the
disease (true negatives). Sensitivity correctly identifies those with the disease (true
positives) .
10. In the Epidemiological Triangle model, a community health nurse investigating a
salmonella outbreak would consider the contaminated food as the:
