NCLEX Practice Questions with Detailed Rationales
Practice the way the real exam works: read the question, commit to an answer, then check the rationale. Every sample below comes from the NursGuru NCLEX study library.
Exam-style questions
Multiple-choice, prioritization, and Next Generation (NGN) formats that mirror what you will see on test day.
Rationales for every answer
Each question explains why the correct answer is right, so every attempt becomes a study session.
Organized by topic
Focus on your weak areas — pharmacology, fluid and electrolytes, maternal-newborn, mental health, and more.
42 NCLEX practice questions
Click any question to reveal the correct answer and its rationale.
NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
From: NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
1. The nurse is assigned four clients. Which client should be assessed first?
- A. Client 2 days post-op requesting pain medication
- B. Client with a new onset of stridor and anxiety
- C. Client due for a scheduled dressing change
- D. Client requesting discharge teaching
Show answer & rationale
Correct answer: B
Stridor indicates upper airway obstruction — a life-threatening airway emergency that takes priority over pain, wound care, or teaching under the ABC framework.
From: NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
2. Which task can the RN safely delegate to an unlicensed assistive personnel (UAP)?
- A. Assessing a new admission
- B. Reinforcing teaching already provided by the RN
- C. Ambulating a stable client post-op day 2
- D. Administering an oral medication
Show answer & rationale
Correct answer: C
UAPs can perform tasks that are routine, do not require nursing judgment, and have a predictable outcome, such as ambulating a stable client. Assessment, teaching, and medication administration require licensed nursing judgment.
From: NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
3. The charge nurse is making assignments. Which client is most appropriate to assign to a newly licensed RN?
- A. Client with a new tracheostomy requiring suctioning teaching
- B. Client 3 days post-op with a stable, uncomplicated recovery
- C. Client in active labor with variable decelerations
- D. Client with a suspected pulmonary embolism
Show answer & rationale
Correct answer: B
Newly licensed RNs should be assigned stable, predictable clients. The other three clients require advanced assessment skills and rapid clinical judgment best suited to an experienced nurse.
From: NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
4. Using SBAR to notify the provider of a change in condition, what should the nurse state under 'Recommendation'?
- A. The client's current vital signs
- B. The nurse's suggested action, such as ordering a STAT chest X-ray
- C. The client's admitting diagnosis
- D. A summary of the client's medical history
Show answer & rationale
Correct answer: B
The 'R' in SBAR stands for Recommendation — the nurse states what they think needs to happen next, which improves communication clarity and speed of response.
From: NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
5. Four clients call the nurse's station at the same time. Which client should the nurse see first?
- A. Client reporting new-onset chest pain
- B. Client requesting a warm blanket
- C. Client asking about their diet order
- D. Client whose IV pump is beeping 'occlusion'
Show answer & rationale
Correct answer: A
New chest pain could indicate a life-threatening cardiac event and takes priority over comfort requests, informational questions, or equipment alarms that are not immediately life-threatening.
NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
From: NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
1. A client receiving IV heparin has an aPTT of 110 seconds (control 30 seconds). What should the nurse do first?
- A. Increase the infusion rate
- B. Stop the infusion and notify the provider
- C. Administer vitamin K
- D. Document the finding and reassess in 4 hours
Show answer & rationale
Correct answer: B
An aPTT more than 2.5x the control indicates the client is over-anticoagulated and at risk for bleeding; the infusion must be stopped and the provider notified. Vitamin K reverses warfarin, not heparin — protamine sulfate is the heparin antidote.
From: NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
2. The nurse is preparing to administer regular insulin and NPH insulin to a client. Which action is correct?
- A. Draw up NPH first, then regular insulin
- B. Draw up regular insulin first, then NPH
- C. Mix them in equal proportions only
- D. Administer them in two separate syringes only
Show answer & rationale
Correct answer: B
When mixing insulins, always draw up the clear (regular) insulin before the cloudy (NPH) insulin to avoid contaminating the regular insulin vial with the longer-acting insulin.
From: NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
3. A client is prescribed digoxin 0.125 mg PO daily. Before administration, which assessment is priority?
- A. Blood pressure
- B. Apical pulse for one full minute
- C. Respiratory rate
- D. Temperature
Show answer & rationale
Correct answer: B
Digoxin toxicity can cause bradycardia; the nurse must count the apical pulse for a full minute and hold the dose if it is below 60 bpm (adult) before administering.
From: NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
4. A client asks why they must take their oral potassium chloride with food. What is the nurse's best response?
- A. "It improves absorption."
- B. "It reduces the risk of GI irritation and ulceration."
- C. "It prevents hyperkalemia."
- D. "It speeds the onset of action."
Show answer & rationale
Correct answer: B
Oral potassium is highly irritating to the GI mucosa and can cause ulceration; taking it with food or a full glass of water reduces this risk.
From: NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
5. A prescription reads: Give 500 mL NS IV over 4 hours. The IV tubing delivers 15 gtt/mL. What is the correct flow rate in gtt/min?
- A. 21 gtt/min
- B. 31 gtt/min
- C. 42 gtt/min
- D. 125 gtt/min
Show answer & rationale
Correct answer: B
500 mL ÷ 240 min = 2.08 mL/min × 15 gtt/mL = 31.25, rounded to 31 gtt/min.
50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
From: 50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
1. A client has a serum potassium level of 6.2 mEq/L. Which finding should the nurse report immediately?
- A. Peaked T waves on the ECG
- B. Serum sodium of 140 mEq/L
- C. Respiratory rate of 18/min
- D. Mild muscle soreness
Show answer & rationale
Correct answer: A
Hyperkalemia causes peaked T waves, widened QRS complexes, and can progress to fatal dysrhythmias. This is the priority finding because it signals cardiac risk, not just a lab abnormality.
From: 50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
2. Which client is at greatest risk for hyponatremia?
- A. Client receiving IV normal saline post-op
- B. Client on SIADH-inducing medication drinking large amounts of water
- C. Client with diabetes insipidus
- D. Client with heat stroke and heavy sweating
Show answer & rationale
Correct answer: B
SIADH causes water retention that dilutes serum sodium; combined with excess free water intake, this is the classic setup for dilutional hyponatremia.
From: 50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
3. A client with heart failure develops fluid overload. Which assessment finding confirms this?
- A. Flat neck veins
- B. Bounding pulses and crackles on lung auscultation
- C. Dry mucous membranes
- D. Poor skin turgor
Show answer & rationale
Correct answer: B
Fluid volume excess presents with bounding pulses, adventitious lung sounds (crackles), jugular venous distention, and edema — the opposite of the dry, flat findings seen in dehydration.
From: 50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
4. Which lab value would the nurse expect in a client with severe vomiting and diarrhea for 3 days?
- A. Elevated BUN and hematocrit
- B. Decreased BUN
- C. Decreased hematocrit
- D. Normal urine specific gravity
Show answer & rationale
Correct answer: A
Fluid volume deficit hemoconcentrates the blood, raising both BUN and hematocrit; urine specific gravity also rises as the kidneys conserve water.
From: 50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
5. A client with hypocalcemia is at risk for which complication?
- A. Constipation
- B. Laryngospasm and tetany
- C. Hyporeflexia
- D. Hypertension
Show answer & rationale
Correct answer: B
Low calcium increases neuromuscular excitability, causing Chvostek's and Trousseau's signs, tetany, and potentially life-threatening laryngospasm.
NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
From: NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
1. A client reports crushing substernal chest pain radiating to the left arm. What is the nurse's first action?
- A. Obtain a 12-lead ECG
- B. Administer sublingual nitroglycerin
- C. Call the client's family
- D. Assess the client's pain scale rating
Show answer & rationale
Correct answer: A
Obtaining a 12-lead ECG immediately is priority to identify STEMI changes and guide time-sensitive treatment; 'time is muscle' in suspected MI, so rapid diagnosis drives every next step.
From: NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
2. Which finding in a client with heart failure indicates the need for immediate intervention?
- A. Weight gain of 3 lbs in 24 hours
- B. Trace pedal edema
- C. Oxygen saturation of 96%
- D. Mild fatigue with exertion
Show answer & rationale
Correct answer: A
A rapid weight gain of 2–3 lbs in 24 hours (or 5 lbs in a week) indicates fluid retention and worsening heart failure requiring prompt evaluation.
From: NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
3. A client with COPD has an oxygen saturation of 89% on room air. What oxygen delivery method is most appropriate initially?
- A. Non-rebreather mask at 15 L/min
- B. Low-flow nasal cannula at 1–2 L/min
- C. No supplemental oxygen needed
- D. High-flow oxygen titrated to 100% saturation
Show answer & rationale
Correct answer: B
Clients with chronic COPD rely on a hypoxic drive to breathe; oxygen should be started at low flow (1–2 L/min) and titrated carefully to avoid suppressing respiratory drive.
From: NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
4. Which lab value would the nurse expect to be elevated in a client having an acute myocardial infarction?
- A. Troponin
- B. Hemoglobin A1c
- C. Serum albumin
- D. Platelet count
Show answer & rationale
Correct answer: A
Troponin is the most sensitive and specific cardiac biomarker for myocardial injury, rising within hours of an MI and remaining elevated for days.
From: NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
5. A client post-cardiac catheterization via the femoral approach must maintain which position?
- A. High Fowler's with legs crossed
- B. Supine with the affected leg straight for the prescribed time
- C. Left lateral position
- D. Ambulate immediately after the procedure
Show answer & rationale
Correct answer: B
The affected leg must remain straight and the client supine (per facility protocol, often 2–6 hours) to prevent bleeding or hematoma at the femoral access site.
NCLEX Maternal-Newborn (OB) Practice Questions
From: NCLEX Maternal-Newborn (OB) Practice Questions
1. The fetal monitor shows variable decelerations. What is the nurse's first action?
- A. Administer oxytocin
- B. Reposition the client, often to left lateral
- C. Prepare for immediate cesarean section
- D. Increase the IV fluid rate only
Show answer & rationale
Correct answer: B
Variable decelerations typically indicate cord compression; repositioning the client (left lateral or knee-chest) is the first intervention to relieve pressure on the cord before other measures.
From: NCLEX Maternal-Newborn (OB) Practice Questions
2. A client is 2 hours postpartum and the nurse notes a boggy fundus above the umbilicus, displaced to the right. What is the priority action?
- A. Administer a stool softener
- B. Have the client void or catheterize if unable
- C. Massage the fundus only
- D. Notify the provider immediately
Show answer & rationale
Correct answer: B
A boggy, displaced fundus is classically caused by a full bladder preventing the uterus from contracting. Having the client void (or catheterizing) is the priority; fundal massage should also follow once the bladder is addressed.
From: NCLEX Maternal-Newborn (OB) Practice Questions
3. Which newborn finding requires immediate nursing action?
- A. Acrocyanosis at 1 hour of age
- B. Respiratory rate of 70/min with grunting and nasal flaring
- C. Molding of the head
- D. Vernix caseosa on the skin
Show answer & rationale
Correct answer: B
Grunting, nasal flaring, and tachypnea over 60/min indicate respiratory distress in a newborn and require immediate intervention; acrocyanosis, molding, and vernix are normal newborn findings.
From: NCLEX Maternal-Newborn (OB) Practice Questions
4. A client with preeclampsia is receiving magnesium sulfate. Which finding indicates toxicity?
- A. Deep tendon reflexes 2+
- B. Respiratory rate of 10/min
- C. Urine output of 40 mL/hr
- D. Serum magnesium of 5 mEq/L
Show answer & rationale
Correct answer: B
Magnesium toxicity depresses the CNS and respiratory drive; a respiratory rate below 12/min is a critical sign requiring the nurse to stop the infusion and prepare to administer calcium gluconate.
From: NCLEX Maternal-Newborn (OB) Practice Questions
5. Which statement by a postpartum client indicates a need for further teaching about breastfeeding?
- A. "I should feel a tugging sensation, not sharp pain, while nursing."
- B. "I'll wake the baby every 2 to 3 hours to feed in the first weeks."
- C. "I should hear my baby swallowing during a feed."
- D. "I'll offer a pacifier before every feeding to soothe the baby."
Show answer & rationale
Correct answer: D
Pacifiers offered before breastfeeding is established can cause nipple confusion and interfere with milk supply; the other statements reflect correct breastfeeding technique.
NCLEX Pediatric Nursing Practice Questions
From: NCLEX Pediatric Nursing Practice Questions
1. Which developmental milestone is expected in a healthy 9-month-old?
- A. Walking independently
- B. Sitting without support and beginning to pull to stand
- C. Speaking in two-word phrases
- D. Riding a tricycle
Show answer & rationale
Correct answer: B
By 9 months, infants typically sit unsupported and begin pulling to stand; independent walking and two-word phrases are later milestones (12–18 months).
From: NCLEX Pediatric Nursing Practice Questions
2. A 2-year-old is admitted with a barking cough, inspiratory stridor, and low-grade fever. Which condition does the nurse suspect?
- A. Epiglottitis
- B. Croup (laryngotracheobronchitis)
- C. Bronchiolitis
- D. Asthma exacerbation
Show answer & rationale
Correct answer: B
A barking cough with stridor and low-grade fever is the classic presentation of croup, most often caused by parainfluenza virus. Epiglottitis presents more abruptly with high fever, drooling, and a toxic appearance.
From: NCLEX Pediatric Nursing Practice Questions
3. The nurse is calculating a pediatric medication dose based on weight. The order is 15 mg/kg/day divided every 8 hours for a 20 kg child. How many mg should the child receive per dose?
- A. 50 mg
- B. 75 mg
- C. 100 mg
- D. 150 mg
Show answer & rationale
Correct answer: C
15 mg/kg × 20 kg = 300 mg/day ÷ 3 doses (every 8 hours) = 100 mg per dose.
From: NCLEX Pediatric Nursing Practice Questions
4. Which action best supports a toddler's developmental need for autonomy during a hospital stay?
- A. Making all care decisions for the child
- B. Offering limited choices, such as which arm to use for a blood pressure check
- C. Keeping the same rigid schedule as home without flexibility
- D. Discouraging the child from participating in care
Show answer & rationale
Correct answer: B
Toddlers are in Erikson's autonomy vs. shame/doubt stage; offering limited, safe choices supports their developmental need for control without overwhelming them.
From: NCLEX Pediatric Nursing Practice Questions
5. A child with suspected epiglottitis arrives in the emergency department. What should the nurse avoid?
- A. Keeping the child calm and upright
- B. Examining the throat with a tongue depressor
- C. Preparing for possible intubation
- D. Keeping emergency airway equipment at the bedside
Show answer & rationale
Correct answer: B
Examining the throat can trigger complete airway obstruction in epiglottitis; the airway should only be visualized in a controlled setting (OR) with intubation equipment ready.
NCLEX Mental Health & Psychiatric Nursing Questions
From: NCLEX Mental Health & Psychiatric Nursing Questions
1. A client states, "I don't see the point in living anymore." What is the nurse's best response?
- A. "Everyone feels that way sometimes."
- B. "Are you thinking of killing yourself?"
- C. "Let's talk about something more positive."
- D. "You have so much to live for."
Show answer & rationale
Correct answer: B
Direct, non-judgmental questioning about suicidal ideation is required whenever a client expresses hopelessness; asking directly does not increase risk and is essential for accurate safety assessment.
From: NCLEX Mental Health & Psychiatric Nursing Questions
2. A client with generalized anxiety disorder is prescribed a benzodiazepine. What teaching is priority?
- A. "Take this medication only during a panic attack."
- B. "Avoid alcohol while taking this medication."
- C. "This medication is safe to take indefinitely without monitoring."
- D. "You can stop this medication abruptly once symptoms improve."
Show answer & rationale
Correct answer: B
Combining benzodiazepines with alcohol causes additive CNS depression that can lead to respiratory depression and death; benzodiazepines also should not be stopped abruptly due to withdrawal risk.
From: NCLEX Mental Health & Psychiatric Nursing Questions
3. Which client statement suggests a manic episode in bipolar disorder?
- A. "I've been sleeping 10 hours a night."
- B. "I started three new projects this week and haven't slept in days."
- C. "I feel worthless and can't get out of bed."
- D. "I've lost interest in things I used to enjoy."
Show answer & rationale
Correct answer: B
Decreased need for sleep, grandiosity, and multiple simultaneous projects are classic signs of mania; the other options describe depressive symptoms.
From: NCLEX Mental Health & Psychiatric Nursing Questions
4. A client with a new diagnosis of major depressive disorder suddenly appears calm and energetic after days of severe depression. What should the nurse do?
- A. Document improved mood and reduce observation
- B. Increase suicide precautions and notify the treatment team
- C. Allow increased unsupervised time
- D. Discontinue the client's safety plan
Show answer & rationale
Correct answer: B
A sudden lift in mood after severe depression can indicate the client has made a decision to attempt suicide and now feels relief; this requires increased, not decreased, monitoring.
From: NCLEX Mental Health & Psychiatric Nursing Questions
5. Which nursing response uses therapeutic communication with a client who is hallucinating?
- A. "There's no one there, you're imagining it."
- B. "I don't see anyone, but I understand this feels real to you."
- C. "Ignore the voices and they'll go away."
- D. "What are the voices telling you to do — I want details."
Show answer & rationale
Correct answer: B
The nurse should not reinforce the hallucination as real but should validate the client's experience of it, maintaining trust while gently orienting them to reality.
NCLEX Lab Values Cheat Sheet + Practice Questions
From: NCLEX Lab Values Cheat Sheet + Practice Questions
1. A client's INR is 6.5. Which action does the nurse anticipate?
- A. Increase the warfarin dose
- B. Hold warfarin and prepare to administer vitamin K
- C. Administer protamine sulfate
- D. No action needed, this is therapeutic
Show answer & rationale
Correct answer: B
An INR of 6.5 is well above the therapeutic range (2–3) and indicates serious bleeding risk; warfarin should be held and vitamin K given per provider order. Protamine reverses heparin, not warfarin.
From: NCLEX Lab Values Cheat Sheet + Practice Questions
2. Which client's platelet count requires the nurse to implement bleeding precautions?
- A. 250,000/mm³
- B. 180,000/mm³
- C. 45,000/mm³
- D. 300,000/mm³
Show answer & rationale
Correct answer: C
A platelet count below 50,000/mm³ significantly increases bleeding risk and requires precautions such as a soft toothbrush, electric razor, and avoiding IM injections.
From: NCLEX Lab Values Cheat Sheet + Practice Questions
3. A client's fasting blood glucose is 58 mg/dL and they are alert. What should the nurse do first?
- A. Give 15–20 g of fast-acting carbohydrate
- B. Administer insulin
- C. Recheck in 4 hours
- D. Notify the provider before treating
Show answer & rationale
Correct answer: A
For a conscious, symptomatic hypoglycemic client, the nurse should immediately give 15–20 g of fast-acting carbohydrate per the 'Rule of 15,' then recheck glucose in 15 minutes.
Therapeutic Communication NCLEX Questions (What to Say / What NOT to Say)
From: Therapeutic Communication NCLEX Questions (What to Say / What NOT to Say)
1. A client newly diagnosed with cancer says, "I don't know how I'm going to tell my kids." Which response is most therapeutic?
- A. "Don't worry, kids are more resilient than you think."
- B. "Tell me more about your concerns with telling your children."
- C. "Why haven't you told them yet?"
- D. "I'm sure you'll figure out the right words."
Show answer & rationale
Correct answer: B
This open-ended response invites the client to explore their feelings without judgment or false reassurance, which is the core of therapeutic communication.
From: Therapeutic Communication NCLEX Questions (What to Say / What NOT to Say)
2. Which nursing response demonstrates active listening?
- A. Interrupting to offer a solution
- B. Restating the client's own words back to confirm understanding
- C. Changing the subject to something less distressing
- D. Immediately calling in another team member
Show answer & rationale
Correct answer: B
Restating or reflecting the client's words shows the nurse is listening and understanding, and encourages the client to continue expressing themselves.
From: Therapeutic Communication NCLEX Questions (What to Say / What NOT to Say)
3. A client says, "I guess this is just God's punishment for something I did." What is the nurse's best response?
- A. "That's not true, God doesn't punish people."
- B. "What makes you feel this is a punishment?"
- C. "Let's not talk about religion right now."
- D. "You should talk to a chaplain instead of me."
Show answer & rationale
Correct answer: B
This response explores the client's meaning and feelings without imposing the nurse's own beliefs or dismissing the client's perspective.
From: Therapeutic Communication NCLEX Questions (What to Say / What NOT to Say)
4. Which response by the nurse is a barrier to therapeutic communication?
- A. "It sounds like you're feeling overwhelmed."
- B. "Why do you feel that way?"
- C. "Can you tell me more about that?"
- D. "What has helped you cope in the past?"
Show answer & rationale
Correct answer: B
'Why' questions tend to put clients on the defensive and imply judgment; open-ended questions that avoid 'why' are preferred in therapeutic communication.
Want thousands more questions?
The study library has full ATI, HESI, and exit-exam practice sets with a rationale for every answer.
Open the Study LibraryPractice questions by topic
NCLEX Prioritization & Delegation Practice Questions (ABC, Maslow, SBAR)
Practice NCLEX prioritization and delegation questions using ABC, Maslow's hierarchy, and delegation-to-scope frameworks, with rationales for each decision.
NCLEX Pharmacology Questions: High-Alert Meds & Dosage Calculations
NCLEX pharmacology practice questions on high-alert medications, dosage calculations, and adverse effects, with rationales explaining the correct nursing action.
50 NCLEX Fluid & Electrolyte Practice Questions (With Rationales)
Practice NCLEX-style fluid and electrolyte questions covering hyponatremia, hyperkalemia, dehydration, and fluid overload, with full rationales for every answer.
NCLEX Med-Surg: Cardiac & Respiratory Practice Questions
NCLEX med-surg practice questions on heart failure, MI, COPD, and respiratory distress, with rationales explaining the correct priority action.
NCLEX Maternal-Newborn (OB) Practice Questions
NCLEX maternal-newborn practice questions covering labor and delivery, postpartum hemorrhage, and newborn assessment, with detailed rationales.
NCLEX Pediatric Nursing Practice Questions
NCLEX pediatric nursing practice questions on growth and development, medication safety, and common childhood illnesses, with rationales for every answer.
NCLEX Mental Health & Psychiatric Nursing Questions
NCLEX mental health practice questions covering therapeutic communication, suicide risk assessment, and psychiatric medications, with full rationales.
NCLEX Lab Values Cheat Sheet + Practice Questions
A quick-reference NCLEX lab values cheat sheet plus practice questions on abnormal labs and the correct nursing action for each.
NCLEX Next Generation (NGN) Case Study Practice Questions
Practice NCLEX Next Generation NGN-style case study questions with clinical judgment models, bowtie items, and trend analysis, fully explained.
Therapeutic Communication NCLEX Questions (What to Say / What NOT to Say)
NCLEX therapeutic communication practice questions showing which nursing responses are therapeutic and which block communication, with rationales.
Frequently asked questions
Is doing more questions always better?
No — after a baseline volume (roughly 1,000+ questions), the marginal benefit of additional questions is smaller than the benefit of deeply reviewing rationales and closing category-specific gaps.
Does a longer NCLEX exam mean I failed?
No. Both passing and failing candidates can get exams of any length up to the maximum allowed questions — exam length reflects how close your ability level is to the passing standard, not which side of it you're on.
Can I pass the NCLEX using only free practice questions?
It's possible, but most candidates benefit from supplementing free resources with at least one source offering deep rationales and Next Generation item types, since these are common gaps in free question banks.
Is there partial credit on NCLEX SATA questions?
On the current NCLEX, most SATA-style items are scored using a +/- polytomous or partial-credit model as part of the new NGN scoring approach, but candidates should still aim to identify each correct option, since the exact scoring per item isn't visible to test-takers in real time.