ONCC Oncology Nursing Certification: Exam
2026–2027 | Comprehensive 100-Question
Practice Test with Answers & Rationales|
Pdf Access Already Graded A+.
Section 1: Oncology Nursing Practice & Scientific Basis (Questions 1-20)
1. Which stage of carcinogenesis involves irreversible cellular changes leading to malignancy?
A. Initiation
B. Promotion
C. Progression
D. Metastasis
Answer: C
Rationale: Progression is the final stage of carcinogenesis where initiated and promoted cells
undergo further genetic changes, becoming malignant and invasive, leading to tumor growth
and potential metastasis.
2. The oncology nurse is caring for a patient receiving myelosuppressive chemotherapy. Which
laboratory value is most critical to monitor for infection risk?
A. Hemoglobin
B. Platelet count
C. Absolute neutrophil count (ANC)
D. White blood cell count with differential
Answer: C
Rationale: The ANC is the most critical indicator of infection risk. An ANC <500/mm³ (severe
neutropenia) significantly increases infection risk. Fever in a neutropenic patient is a medical
emergency requiring immediate evaluation and antibiotics.
,3. A patient has a platelet count of 15,000/mm³. Which nursing intervention is most
appropriate?
A. Use a soft-bristled toothbrush
B. Administer IM injections
C. Encourage vigorous ambulation
D. Insert a straight catheter for urinary retention
Answer: A
Rationale: With severe thrombocytopenia, bleeding precautions include using a soft
toothbrush, electric razor, avoiding IM injections, and avoiding invasive procedures. Vigorous
activity should be avoided to prevent trauma.
4. Which chemotherapy drug class is most likely to cause peripheral neuropathy?
A. Antimetabolites
B. Taxanes
C. Alkylating agents
D. Anthracyclines
Answer: B
Rationale: Taxanes, such as paclitaxel, disrupt microtubule function, leading to peripheral
neuropathy, a common dose-limiting side effect.
5. Which laboratory value is critical to monitor in patients receiving cisplatin?
A. Platelet count
B. Serum creatinine
C. Hemoglobin
D. White blood cell count
Answer: B
Rationale: Cisplatin is nephrotoxic, and serum creatinine is monitored to assess renal function
and prevent acute kidney injury.
6. What is the primary purpose of oncology nursing certification?
,A. To ensure basic RN licensure
B. To validate specialized knowledge in oncology nursing
C. To provide continuing education credits
D. To replace clinical experience
Answer: B
Rationale: Oncology nursing certification, such as the OCN®, validates a nurse's specialized
knowledge and skills in oncology beyond basic RN licensure, ensuring expertise and promoting
patient safety.
7. Which factor increases the risk of chemotherapy-induced nausea and vomiting (CINV)?
A. Male gender
B. Age over 60 years
C. History of motion sickness
D. High body mass index
Answer: C
Rationale: A history of motion sickness predisposes patients to CINV due to heightened
sensitivity of the vomiting center in the brain.
8. What is the primary purpose of a comprehensive geriatric assessment (CGA) in oncology?
A. To determine chemotherapy dosing
B. To evaluate functional status and treatment tolerance
C. To replace diagnostic imaging
D. To assess pain levels only
Answer: B
Rationale: A CGA evaluates functional status, comorbidities, and cognitive function in older
adults to guide safe and effective cancer treatment decisions.
9. A patient receiving chemotherapy has an ANC of 400/mm³ and a temperature of 38.5°C.
What is the priority nursing action?
A. Administer acetaminophen and reassess in 4 hours
B. Obtain blood cultures and administer broad-spectrum antibiotics
, C. Encourage oral fluids and rest
D. Apply cooling blankets
Answer: B
Rationale: Febrile neutropenia (ANC <500, fever >38.3°C) is a medical emergency. Blood
cultures should be obtained and broad-spectrum antibiotics administered immediately, within 1
hour.
10. Which type of chemotherapy-induced nausea and vomiting (CINV) occurs 24 hours or
more after treatment?
A. Acute
B. Delayed
C. Anticipatory
D. Breakthrough
Answer: B
Rationale: Delayed CINV occurs 24 hours or more after chemotherapy, often requiring different
antiemetic strategies than acute CINV, which occurs within 24 hours.
11. What is a key benefit of neoadjuvant chemotherapy in breast cancer treatment?
A. Eliminates the need for surgery
B. Reduces tumor size to facilitate less invasive surgery
C. Prevents all chemotherapy side effects
D. Guarantees complete remission
Answer: B
Rationale: Neoadjuvant chemotherapy shrinks tumors before surgery, potentially allowing
breast-conserving surgery instead of mastectomy, improving cosmetic outcomes.
12. Which finding is most concerning for extravasation of vesicant chemotherapy?
A. Mild erythema at the IV site
B. Swelling and pain at the IV site
C. Blanching at the IV site
D. Warmth at the IV site
2026–2027 | Comprehensive 100-Question
Practice Test with Answers & Rationales|
Pdf Access Already Graded A+.
Section 1: Oncology Nursing Practice & Scientific Basis (Questions 1-20)
1. Which stage of carcinogenesis involves irreversible cellular changes leading to malignancy?
A. Initiation
B. Promotion
C. Progression
D. Metastasis
Answer: C
Rationale: Progression is the final stage of carcinogenesis where initiated and promoted cells
undergo further genetic changes, becoming malignant and invasive, leading to tumor growth
and potential metastasis.
2. The oncology nurse is caring for a patient receiving myelosuppressive chemotherapy. Which
laboratory value is most critical to monitor for infection risk?
A. Hemoglobin
B. Platelet count
C. Absolute neutrophil count (ANC)
D. White blood cell count with differential
Answer: C
Rationale: The ANC is the most critical indicator of infection risk. An ANC <500/mm³ (severe
neutropenia) significantly increases infection risk. Fever in a neutropenic patient is a medical
emergency requiring immediate evaluation and antibiotics.
,3. A patient has a platelet count of 15,000/mm³. Which nursing intervention is most
appropriate?
A. Use a soft-bristled toothbrush
B. Administer IM injections
C. Encourage vigorous ambulation
D. Insert a straight catheter for urinary retention
Answer: A
Rationale: With severe thrombocytopenia, bleeding precautions include using a soft
toothbrush, electric razor, avoiding IM injections, and avoiding invasive procedures. Vigorous
activity should be avoided to prevent trauma.
4. Which chemotherapy drug class is most likely to cause peripheral neuropathy?
A. Antimetabolites
B. Taxanes
C. Alkylating agents
D. Anthracyclines
Answer: B
Rationale: Taxanes, such as paclitaxel, disrupt microtubule function, leading to peripheral
neuropathy, a common dose-limiting side effect.
5. Which laboratory value is critical to monitor in patients receiving cisplatin?
A. Platelet count
B. Serum creatinine
C. Hemoglobin
D. White blood cell count
Answer: B
Rationale: Cisplatin is nephrotoxic, and serum creatinine is monitored to assess renal function
and prevent acute kidney injury.
6. What is the primary purpose of oncology nursing certification?
,A. To ensure basic RN licensure
B. To validate specialized knowledge in oncology nursing
C. To provide continuing education credits
D. To replace clinical experience
Answer: B
Rationale: Oncology nursing certification, such as the OCN®, validates a nurse's specialized
knowledge and skills in oncology beyond basic RN licensure, ensuring expertise and promoting
patient safety.
7. Which factor increases the risk of chemotherapy-induced nausea and vomiting (CINV)?
A. Male gender
B. Age over 60 years
C. History of motion sickness
D. High body mass index
Answer: C
Rationale: A history of motion sickness predisposes patients to CINV due to heightened
sensitivity of the vomiting center in the brain.
8. What is the primary purpose of a comprehensive geriatric assessment (CGA) in oncology?
A. To determine chemotherapy dosing
B. To evaluate functional status and treatment tolerance
C. To replace diagnostic imaging
D. To assess pain levels only
Answer: B
Rationale: A CGA evaluates functional status, comorbidities, and cognitive function in older
adults to guide safe and effective cancer treatment decisions.
9. A patient receiving chemotherapy has an ANC of 400/mm³ and a temperature of 38.5°C.
What is the priority nursing action?
A. Administer acetaminophen and reassess in 4 hours
B. Obtain blood cultures and administer broad-spectrum antibiotics
, C. Encourage oral fluids and rest
D. Apply cooling blankets
Answer: B
Rationale: Febrile neutropenia (ANC <500, fever >38.3°C) is a medical emergency. Blood
cultures should be obtained and broad-spectrum antibiotics administered immediately, within 1
hour.
10. Which type of chemotherapy-induced nausea and vomiting (CINV) occurs 24 hours or
more after treatment?
A. Acute
B. Delayed
C. Anticipatory
D. Breakthrough
Answer: B
Rationale: Delayed CINV occurs 24 hours or more after chemotherapy, often requiring different
antiemetic strategies than acute CINV, which occurs within 24 hours.
11. What is a key benefit of neoadjuvant chemotherapy in breast cancer treatment?
A. Eliminates the need for surgery
B. Reduces tumor size to facilitate less invasive surgery
C. Prevents all chemotherapy side effects
D. Guarantees complete remission
Answer: B
Rationale: Neoadjuvant chemotherapy shrinks tumors before surgery, potentially allowing
breast-conserving surgery instead of mastectomy, improving cosmetic outcomes.
12. Which finding is most concerning for extravasation of vesicant chemotherapy?
A. Mild erythema at the IV site
B. Swelling and pain at the IV site
C. Blanching at the IV site
D. Warmth at the IV site
