Registration Examination for Dietitians (RDN/RD) — Questions and Answers

Question 1: An RDN hired by a corporation to design employee wellness programs and reduce healthcare costs is working in which practice area?

Worksite/corporate wellness (Correct answer)
Food safety inspection
Correctional nutrition
Long-term care

Correct answer: Worksite/corporate wellness

Worksite or corporate wellness dietitians design health promotion programs to improve employee nutrition and reduce employer healthcare expenditures.

Question 2: What is the minimum degree requirement to sit for the RDN credentialing exam starting January 1, 2024?

Master's degree (Correct answer)
Doctoral degree
Associate's degree
Bachelor's degree

Correct answer: Master's degree

As of January 1, 2024, a minimum of a master's degree is required to sit for the RDN credentialing examination.

Question 3: A dietitian conducting a food safety audit notices that a kitchen employee is wearing gloves but touches their face repeatedly while preparing salads. What is the primary food safety concern?

Gloves are not required for salad preparation under FDA rules
Gloves do not prevent contamination if changed improperly or if the employee touches contaminating surfaces (Correct answer)
The concern is minimal because gloves provide complete protection from hand-to-food contamination
Only latex-free gloves are required for safe food handling

Correct answer: Gloves do not prevent contamination if changed improperly or if the employee touches contaminating surfaces

Gloves can become contaminated just as bare hands can; touching the face and continuing food prep without changing gloves transfers pathogens to the food.

Question 4: In HACCP, a Critical Control Point (CCP) is best defined as:

A step where control can be applied to prevent or eliminate a food safety hazard (Correct answer)
Any point in production where a quality check occurs
The final inspection before food is served
A record-keeping checkpoint in the food process

Correct answer: A step where control can be applied to prevent or eliminate a food safety hazard

A CCP is a specific point in the food production process where a control measure can be applied to prevent, eliminate, or reduce a food safety hazard to an acceptable level.

Question 5: What examination must candidates pass to earn the RDN credential?

National Nutrition Assessment Exam
Commission on Dietetic Registration Exam (Correct answer)
Certified Clinical Nutritionist Exam
Dietetics Licensing Board Exam

Correct answer: Commission on Dietetic Registration Exam

After completing an ACEND-accredited didactic program and supervised practice, candidates must pass the national examination administered by the Commission on Dietetic Registration (CDR). This comprehensive exam assesses the candidate's knowledge and skills across various domains of dietetics practice. Successfully passing this exam is the final step to earning the RDN credential.

Question 6: Under the National School Lunch Program (NSLP), schools must offer meals that meet which nutritional standards?

Only calorie limits as determined by the state education department
Any standards set by the school district's food service director
The USDA's Dietary Guidelines for Americans and specific nutrient targets (Correct answer)
The American Heart Association's dietary recommendations exclusively

Correct answer: The USDA's Dietary Guidelines for Americans and specific nutrient targets

NSLP regulations require school meals to align with the Dietary Guidelines for Americans and meet specific nutrient and food component standards set by the USDA.

Question 7: When storing foods in a walk-in refrigerator, which storage order from top to bottom is correct according to food safety guidelines?

Whole poultry → ground meats → whole cuts of beef → seafood → ready-to-eat foods
Ready-to-eat foods → whole poultry → ground meats → seafood → whole cuts of beef
Ready-to-eat foods → whole seafood → whole cuts of beef → ground meats → whole poultry (Correct answer)
Seafood → whole cuts of beef → ground meats → whole poultry → ready-to-eat foods

Correct answer: Ready-to-eat foods → whole seafood → whole cuts of beef → ground meats → whole poultry

Foods should be stored based on their required minimum internal cooking temperatures, with ready-to-eat foods on top and foods requiring the highest cooking temperature (poultry) on the bottom.

Question 8: What role does ethics play in Food Service Management practice?

It only matters for legal compliance
Ethics is optional in professional settings
It only applies to managers
It guides professional conduct and protects stakeholders (Correct answer)

Correct answer: It guides professional conduct and protects stakeholders

Professional ethics provide frameworks for responsible decision-making, ensuring practitioners act in the best interest of those they serve.

Question 9: Pyruvate dehydrogenase complex requires five cofactors; which of the following is NOT one of them?

Thiamin pyrophosphate (TPP)
Pyridoxal phosphate (PLP) (Correct answer)
Lipoic acid
FAD

Correct answer: Pyridoxal phosphate (PLP)

The pyruvate dehydrogenase complex uses TPP, lipoic acid, FAD, NAD+, and CoA (derived from pantothenic acid) as cofactors, but does NOT require pyridoxal phosphate (PLP/B6).

Question 10: A foodservice operation's budget shows fixed costs of $8,000/month and variable costs of $4 per meal. If 3,000 meals are served, what is the total monthly cost?

$32,000
$24,000
$12,000
$20,000 (Correct answer)

Correct answer: $20,000

Total cost = fixed costs + (variable cost per meal × number of meals) = $8,000 + ($4 × 3,000) = $8,000 + $12,000 = $20,000.

Question 11: A patient with gastroparesis has failed gastric motility medications and oral feeding. What is the preferred long-term enteral access route?

Nasojejunal tube
Nasogastric tube
Gastrostomy tube (PEG)
Jejunostomy tube (PEJ) (Correct answer)

Correct answer: Jejunostomy tube (PEJ)

A jejunostomy tube bypasses the dysmotile stomach entirely, providing reliable long-term enteral access past the pylorus in gastroparesis.

Question 12: Which certification specifically recognizes an RDN's expertise in pediatric nutrition?

CSP — Certified Specialist in Pediatric Nutrition (Correct answer)
CSO — Certified Specialist in Oncology Nutrition
CSOWM — Certified Specialist in Obesity and Weight Management
CSSD — Certified Specialist in Sports Dietetics

Correct answer: CSP — Certified Specialist in Pediatric Nutrition

The CSP (Certified Specialist in Pediatric Nutrition) is a CDR board certification for RDNs with advanced pediatric practice.

Question 13: Which enzyme deficiency leads to the accumulation of branched-chain amino acids (leucine, isoleucine, valine) as seen in maple syrup urine disease?

Propionyl-CoA carboxylase
Branched-chain aminotransferase
Isovaleryl-CoA dehydrogenase
Branched-chain alpha-keto acid dehydrogenase complex (Correct answer)

Correct answer: Branched-chain alpha-keto acid dehydrogenase complex

Maple syrup urine disease results from deficiency of branched-chain alpha-keto acid dehydrogenase, which oxidatively decarboxylates the keto acids derived from BCAA transamination.

Question 14: Which of the following best describes the role of ACEND in dietetics education?

Sets national nutrition policy for federal food programs
Accredits dietetics education programs and supervised practice programs (Correct answer)
Administers the CDR credentialing examination
Licenses individual RDNs in each state

Correct answer: Accredits dietetics education programs and supervised practice programs

ACEND is responsible for accrediting dietetics education programs (academic and supervised practice) to ensure they meet established quality standards.

Question 15: Which federal law requires foodservice operations to display or make available calorie information for standard menu items at chain restaurants with 20 or more locations?

The Federal Food, Drug, and Cosmetic Act (FD&C Act)
The Nutrition Labeling and Education Act (NLEA)
The Affordable Care Act (ACA) menu labeling provision (Correct answer)
The Food Safety Modernization Act (FSMA)

Correct answer: The Affordable Care Act (ACA) menu labeling provision

The ACA's menu labeling provision (implemented by the FDA) requires chain restaurants and similar foodservice establishments with 20+ locations to post calorie information on menus.

Question 16: Which population is at greatest risk for both overnutrition and undernutrition simultaneously, a condition known as the 'double burden of malnutrition'?

Low- and middle-income countries undergoing nutrition transition (Correct answer)
Elderly adults in nursing homes
High-income suburban communities
Elite athletes in caloric surplus

Correct answer: Low- and middle-income countries undergoing nutrition transition

The double burden of malnutrition—coexisting undernutrition and overweight/obesity—is most prevalent in low- and middle-income countries experiencing rapid dietary and lifestyle transitions.

Question 17: In the evidence hierarchy used by the Academy of Nutrition and Dietetics, which type of evidence is placed at the LOWEST level?

Systematic review or meta-analysis
Expert opinion, editorials, or anecdotal reports (Correct answer)
Prospective cohort study
Randomized controlled trial

Correct answer: Expert opinion, editorials, or anecdotal reports

Expert opinion, editorials, and anecdotal evidence represent the lowest level of evidence because they are not based on systematic research methodology and are highly susceptible to individual bias.

Question 18: Cyclospora cayetanensis is a parasitic protozoan that has been linked to multiple foodborne illness outbreaks in the US. What food vehicle is most commonly implicated?

Undercooked pork
Fresh imported produce such as raspberries, basil, and cilantro (Correct answer)
Unpasteurized apple cider
Raw oysters and clams

Correct answer: Fresh imported produce such as raspberries, basil, and cilantro

Cyclospora outbreaks in the US have most frequently been linked to fresh imported produce, particularly raspberries from Guatemala, basil, and cilantro.

Question 19: The USDA's 'Dietary Guidelines for Americans' recommends that sodium intake for most adults should be limited to no more than:

2,000 mg/day
1,500 mg/day
3,000 mg/day
2,300 mg/day (Correct answer)

Correct answer: 2,300 mg/day

The Dietary Guidelines for Americans recommend limiting sodium intake to less than 2,300 mg per day for adults, which equals approximately 1 teaspoon of salt.

Question 20: What does a 'scope of practice' framework for RDNs primarily define?

The geographic regions where an RDN may practice
The number of patients an RDN may see per day
The range of activities an RDN is qualified and authorized to perform (Correct answer)
The minimum salary an RDN must earn in clinical settings

Correct answer: The range of activities an RDN is qualified and authorized to perform

Scope of practice defines the breadth of services, procedures, and activities that a credentialed professional is qualified and authorized to provide.

Question 21: Which study approach is most effective for Food Service Management material?

Active recall with practice questions (Correct answer)
Highlighting all text
Passive re-reading of notes
Studying for very long sessions without breaks

Correct answer: Active recall with practice questions

Active recall through practice questions is the most effective study method, as it strengthens memory retrieval pathways.

Question 22: Which program replaced the Didactic Program in Dietetics (DPD) as part of the Future Education Model?

Future Education Model Academic Program (Correct answer)
Accredited Didactic Dietetics Program
Coordinated Program in Dietetics
Individualized Supervised Practice Pathway

Correct answer: Future Education Model Academic Program

The Future Education Model Academic Program replaced the traditional DPD under ACEND's Future Education Model.

Question 23: A dietary intervention reduces cardiovascular disease risk from 20% to 15%. The relative risk reduction (RRR) is:

15%
75%
25% (Correct answer)
5%

Correct answer: 25%

RRR = (control event rate − intervention event rate) ÷ control event rate = (20% − 15%) ÷ 20% = 25%.

Question 24: Which specialty credential, offered by CDR, is designed for RDNs practicing in oncology nutrition?

CSO — Certified Specialist in Oncology (Correct answer)
CPON — Certified Pediatric Oncology Nurse
CNS — Certified Nutrition Specialist
CSSD — Certified Specialist in Sports Dietetics

Correct answer: CSO — Certified Specialist in Oncology

The CSO (Certified Specialist in Oncology) is a CDR board certification for RDNs with advanced practice in oncology nutrition.

Question 25: Why is continuing education important in Community Nutrition?

It is not important after certification
Only for re-certification requirements
To stay current with evolving standards and practices (Correct answer)
To network only

Correct answer: To stay current with evolving standards and practices

Continuing education keeps professionals updated with the latest developments, standards, and best practices in their field.

Question 26: A dietetics student completes their academic requirements but fails to match to a dietetic internship. Which CDR pathway allows them to earn supervised practice hours outside a traditional internship?

Didactic Program in Dietetics
Distance Learning Dietetic Program
Coordinated Program in Dietetics
Individualized Supervised Practice Pathway (ISPP) (Correct answer)

Correct answer: Individualized Supervised Practice Pathway (ISPP)

The ISPP allows qualified individuals to complete supervised practice requirements under a preceptor outside of a traditional ACEND-accredited internship.

Question 27: Valid informed consent for a nutrition research study requires that participants:

Hold at minimum a college degree to ensure they comprehend study risks
Sign a legal liability waiver releasing researchers from all responsibility
Be randomized to a group assignment before providing consent
Voluntarily agree to participate after receiving adequate information about the study's purpose, risks, benefits, and right to withdraw (Correct answer)

Correct answer: Voluntarily agree to participate after receiving adequate information about the study's purpose, risks, benefits, and right to withdraw

Informed consent protects participant autonomy by ensuring they voluntarily agree to participate only after fully understanding the study's purpose, procedures, potential risks and benefits, and their right to withdraw at any time.

Question 28: What is HIPAA?

Health Insurance Portability and Accountability Act — protects patient privacy (Correct answer)
A medical diagnosis code
A type of insurance plan
A hospital ranking system

Correct answer: Health Insurance Portability and Accountability Act — protects patient privacy

HIPAA establishes national standards for protecting patient health information, ensuring privacy and security of medical records.

Question 29: In which setting is an RDN likely to work as a food service manager?

Research laboratories
School cafeterias or corporate dining facilities (Correct answer)
Retail stores
Fitness centers

Correct answer: School cafeterias or corporate dining facilities

RDNs often work as food service managers in institutional settings where large-scale meal planning and preparation are required. School cafeterias and corporate dining facilities are prime examples, where RDNs ensure that meals meet nutritional standards, accommodate dietary restrictions, and adhere to budgetary constraints. They oversee staff, manage operations, and maintain food safety.

Question 30: When conducting a nutritional assessment, which biochemical marker reflects long-term vitamin A status MOST accurately?

Serum retinol
Serum beta-carotene
Relative dose response (RDR) test (Correct answer)
Urinary retinol excretion

Correct answer: Relative dose response (RDR) test

The relative dose response (RDR) test measures the liver's response to a dose of vitamin A, reflecting hepatic reserves and long-term status more accurately than serum retinol alone.

Registration Examination for Dietitians (RDN/RD)

The Commission on Dietetic Registration (CDR) Registration Examination for Dietitians (RD/RDN) is a computer-adaptive test that assesses entry-level competency across nutrition care, dietetic principles, food and nutrition program management, and foodservice systems. Passing is required to earn the Registered Dietitian Nutritionist credential.

Questions

40 min

Time Limit

70%

To Pass

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