Rationales
Here is a 200-question practice test for the ANCC Family Nurse Practitioner (FNP)
Certification Exam, updated for 2026 and aligned with the official ANCC exam
blueprint. The test covers Assessment, Diagnosis, Planning, Implementation, and
Evaluation. Each question includes the correct answer and a detailed rationale to
support your exam preparation.
Domain: Assessment (19% – Questions 1-38)
1. A 58-year-old male with a 40-pack-year smoking history presents with a cough
that has persisted for 3 months. A chest X-ray shows a 2 cm solitary pulmonary
nodule. Which characteristic most strongly suggests the nodule is malignant?
- A) Smooth, well-defined borders
- B) Presence of central calcification
- C) Spiculated (sunburst) borders
- D) Location in the right lower lobe
Answer: C
Rationale: Radiographic features suggestive of malignancy in a solitary pulmonary
nodule include spiculated or irregular margins (corona maligna), large size (>3
cm), and patient risk factors (age, smoking history). Smooth borders and central
calcification are more indicative of a benign process (e.g., granuloma) .
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,2. A 2-month-old Black infant presents for a routine well-child visit. On physical
exam, you note two light-brown macules with uniform borders on the infant's
torso. What is the most likely diagnosis?
- A) Café-au-lait spots
- B) Congenital dermal melanocytosis (Mongolian spots)
- C) Milia
- D) Salmon patch
Answer: A
Rationale: Café-au-lait spots are light-brown macules with smooth borders. Seeing
1-2 in isolation is often a normal variant in infants. However, the presence of more
than 5-6 spots (especially in a child) raises suspicion for neurofibromatosis .
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3. A 72-year-old woman with a history of hypertension presents with progressive
shortness of breath over the last few weeks. She reports worsening symptoms at
night when she lies flat. An echocardiogram demonstrates diffuse left ventricular
hypertrophy and an ejection fraction of 65%. In this patient population, which of
the following has been shown to confer a mortality benefit?
- A) Beta-blockers
- B) Spironolactone
- C) ACE inhibitors
- D) No agent has shown a mortality benefit in this population
,Answer: D
Rationale: This clinical presentation (exertional dyspnea, orthopnea, preserved EF)
is consistent with Heart Failure with Preserved Ejection Fraction (HFpEF). Large
clinical trials have not demonstrated a consistent mortality benefit for beta-
blockers, diuretics, spironolactone, or ACE inhibitors specifically in the HFpEF
population. Current management focuses on symptom control (e.g., diuretics for
volume overload) and treating comorbidities .
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4. A 47-year-old woman presents with 4 days of high fever, headache, and
myalgias. She developed a blanching erythematous rash with macules on her
wrists and ankles that spread to her trunk 2 days ago. She reports no history of
overseas travel but was camping in Arkansas last weekend. Which of the following
is the most appropriate treatment for the suspected diagnosis?
- A) Ceftriaxone
- B) Doxycycline (Vibramycin)
- C) Erythromycin (Erythrocin)
- D) Vancomycin (Vancocin)
Answer: B
Rationale: This patient's presentation is consistent with Rocky Mountain spotted
fever (RMSF), a tick-borne illness endemic in the Arkansas/Mid-South region.
Doxycycline is first-line treatment for RMSF in adults and children regardless of
age, and early initiation reduces mortality and complications .
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, 5. A 62-year-old woman presents to the clinic with spotting for 2 weeks. Her last
menstrual cycle was 8 years ago. She reports that she is sexually active with one
partner. A pelvic examination reveals atrophic vaginal mucosa without evidence of
bleeding, and adnexal masses are not palpable. The vulvar and urethral
examination is unremarkable. Stool guaiac testing is negative. Which of the
following is the most likely diagnosis?
- A) Bladder cancer
- B) Endometrial carcinoma
- C) Ovarian fibroma
- D) Rectal adenocarcinoma
Answer: B
Rationale: Postmenopausal bleeding or spotting is endometrial cancer until
proven otherwise. Although atrophic vaginitis is common, persistent spotting
mandates evaluation for malignancy. Negative stool guaiac and no masses reduce
likelihood of GI or ovarian cancer. Prompt referral for endometrial biopsy is
standard .
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6. A 9-month-old female infant presents to the clinic for a routine well-child visit.
Six months ago, she was prescribed omeprazole (Prilosec) due to
gastroesophageal reflux and poor weight gain. At the present visit, her parents
report that she is drinking approximately 24 ounces of formula daily and eating
some solid foods. They report no current issues with reflux. While reviewing the
patient's growth chart, the nurse practitioner notes steady and appropriate