Regulations and Reporting
You apply health rules and reporting requirements to specific situations — who must be trained, what must be reported, and how quickly. Read the notice exactly as written.
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Public Health Exam Study Guide
Regulations, epidemiology concepts, ethics, and analytical reasoning for public health civil service roles.
12 track practice questions in the bank · Free 25-question practice test included below.
Take Free Practice Test →Overview
Public health roles protect the health of whole communities: tracking illness, inspecting facilities, running screening and outreach programs, and making sure health rules are followed. The work mixes data, regulations, and direct contact with the public.
The exam is a multiple-choice test that measures your grasp of basic epidemiology ideas, your ability to read and apply health regulations, and your judgment in community situations. Expect questions on rates and numbers, reporting duties, informed consent, and privacy of health information. For DCAS multiple-choice exams generally, the pass mark is 70%.
Use this guide as a study map. Work through the topics below, drill the concepts and calculations until they feel routine, and use the practice questions to check your understanding against the reasoning behind each answer.
What the exam typically tests
Epidemiology Concepts
You work with the basic ideas of disease measurement: incidence, prevalence, outbreaks, and screening tests. The exam checks whether you can define each term and use it correctly.
Ethics and Confidentiality
You are tested on informed consent, privacy of health information, and honest communication with clients. Consent requires understanding, not just a signature.
Reading Comprehension
You read short passages, notices, and memos and answer questions about what they require. The correct answer is the one the text actually supports, not the one that sounds sensible.
Analytical Reasoning and Numbers
You calculate rates, percentages, and expected case counts from given numbers. Set up the calculation first — most errors come from using the wrong denominator.
Situational Judgment
You choose the best response to realistic situations: a client who refuses screening, a rising trend in the data, a report with missing details. The best answer follows procedure and protects the public.
Topic checklist
Work through this list honestly — drill the items you cannot do yet.
- ☐ Define incidence, prevalence, outbreak, and screening in your own words
- ☐ Calculate a prevalence rate and a rate per 1,000 from given numbers
- ☐ State what a health notice requires, who it applies to, and by when
- ☐ Decide when a suspected case must be reported and to whom
- ☐ Explain a screening's purpose, risks, and benefits in plain language before consent
- ☐ Remove identifying information before sharing health data outside the agency
- ☐ Describe a trend in the data without claiming a cause you have not proven
- ☐ Choose the best response when a client refuses a screening or is upset
- ☐ Record health information promptly, completely, and accurately
- ☐ Distinguish a sensitive test from a specific one
How to prepare
1Concept Drill (daily)
Take one public health concept per day — incidence, prevalence, outbreak, screening — and explain it in your own words without notes. Good looks like: you can give a one-sentence definition and a small example.
2Rates and Numbers Drill (3x per week)
Practice five rate problems per session: rates per 1,000, percentages, and simple prevalence calculations. Good looks like: you set up the division correctly before calculating.
3Notice Review Drill (2x per week)
Read a short health notice or memo and list exactly what it requires, who it applies to, and by when. Good looks like: no added assumptions and no missed conditions.
4Trend-and-Response Drill (2x per week)
Read a scenario with a rising trend and write down what you would report, to whom, and what you would not conclude yet. Good looks like: you describe the pattern without claiming a cause.
5Timed Mixed Set (weekly)
Do 25 mixed questions in 30 minutes without pausing. Good looks like: you finish the set and your errors cluster on one topic you can then target.
Common mistakes to avoid
- ✕ Confusing incidence (new cases over time) with prevalence (all cases at one time) — the exam tests this distinction directly.
- ✕ Assuming a cause from a pattern. A trend is evidence to investigate, not proof of what caused it.
- ✕ Skipping the explanation step when a client does not understand — consent requires understanding, not just a signature.
- ✕ Sharing identifiable health data with outside agencies without removing names and identifying details.
- ✕ Rounding carelessly on rate problems. Set up the calculation first, then compute.
Exam day strategy
- ✓ Arrive early and bring the identification the exam announcement requires.
- ✓ Read the question before the passage so you know which detail to look for.
- ✓ On math items, write the formula or set up the calculation before you touch the numbers.
- ✓ If two answers both look right, pick the one the rules or the data actually support, not the one that sounds most dramatic.
- ✓ Keep a steady pace — do not spend more than a minute on any single question on your first pass.
- ✓ If time remains, review only the questions you marked as uncertain.
Sample questions
Try these 3 sample questions from the practice bank. The correct answer is marked — read the explanation even when you get one right.
Sample 1 · Vocabulary
In public health, the term 'incidence' most nearly means:
- A.All cases of a disease present at a single point in time.
- B.The number of deaths caused by a disease.
- C.New cases of a disease that occur over a period of time. ✓ Correct answer
- D.The percentage of people who recover from a disease.
Incidence counts new cases appearing over a period of time, while prevalence counts all cases present at a point in time. This is the basic distinction between the two measures.
Sample 2 · Mathematics
A town of 50,000 people has 250 residents currently living with a particular chronic condition. What is the prevalence of the condition in the town?
- A.1 percent
- B.0.5 percent ✓ Correct answer
- C.5 percent
- D.0.05 percent
Prevalence is total existing cases divided by the total population. 250 cases in a population of 50,000 gives 250 / 50,000 = 0.005, or 0.5 percent.
Sample 3 · Situational Judgment
A client signs a consent form for a health screening but tells you she does not understand what the screening is for. What should you do before proceeding?
- A.Proceed with the screening, since the client signed the form.
- B.Give the client a brief summary and then begin immediately.
- C.Explain the purpose, risks, and benefits in plain language, answer questions, and only proceed once the client understands and agrees. ✓ Correct answer
- D.Skip the explanation because the screening is low risk.
Informed consent means the person understands the purpose, risks, and benefits before agreeing. Proceeding without that understanding violates basic ethical principles.
Official sources
The exam announcement (Notice of Examination) is the final authority for the exam you are taking — it states the exact subjects, requirements, and procedures. Check it before your exam date, because this guide covers general preparation, not the specifics of any single announcement.
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Important disclaimer
All questions on NYCExamPrep.com are original practice questions written for study purposes. They are not official DCAS questions, and this site is not affiliated with the NYC Department of Citywide Administrative Services (DCAS) or the City of New York.