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NCIS Special Agent (1811) Selection Exam — Phase I Cognitive/Logical Reasoning practice questions are available now; exam metadata is being verified.
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A figural matrix increases sides each step: triangle (3 sides), square (4), pentagon (5), then a missing figure. What shape comes next?
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B
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D
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2026 Statistics
Key Facts: NCIS Special Agent Exam
~3 hrs
Phase I Battery Time
Federal 1811 special agent Phase I format
7 areas
Cognitive & Behavioral Sections
Phase I battery structure
Under 37
Max Age at Appointment
NCIS Careers
$0
Application Fee
USAJobs federal hiring
Top Secret
Required Clearance
NCIS Careers
6-9 mo
Hiring Process Length
NCIS hiring process
The NCIS Special Agent (1811) Phase I exam is an approximately three-hour, computer-based selection battery for federal criminal investigator applicants. It blends cognitive and logical reasoning measures — logic-based reasoning, figural/abstract reasoning, reading comprehension, and numerical reasoning — with situational judgment and behavioral assessments. There is no application fee. NCIS does not publicly publish the passing cutoff, and the full hiring process runs about six to nine months.
Sample NCIS Special Agent Practice Questions
Try these sample questions to test your NCIS Special Agent exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1A passage states: "All NCIS field offices report to a regional headquarters. The Singapore field office is an NCIS field office." Which conclusion logically follows?
A.The Singapore field office reports to a regional headquarters.
B.Every regional headquarters has a Singapore field office.
C.Only the Singapore field office reports to a regional headquarters.
D.The Singapore field office is a regional headquarters.
Explanation: This is a valid categorical syllogism. If all field offices report to a regional headquarters, and Singapore is a field office, then Singapore must report to a regional headquarters. The conclusion follows necessarily from both premises.
2Read: "No agent who failed the polygraph was advanced to the interview. Agent Reyes was advanced to the interview." What can be validly concluded about Agent Reyes?
A.Agent Reyes did not fail the polygraph.
B.Agent Reyes definitely passed the background check.
C.Agent Reyes scored highest on the polygraph.
D.Agent Reyes was the only agent advanced.
Explanation: By modus tollens (contrapositive), if no one who failed was advanced, and Reyes was advanced, then Reyes did not fail. The valid conclusion is limited to negating the antecedent through the contrapositive.
3A report says: "If a vessel departs without clearance, it is logged as a security incident. The cargo ship Meridian was NOT logged as a security incident." Which statement must be true?
A.The Meridian did not depart without clearance.
B.The Meridian never departed at all.
C.The Meridian departed with a security escort.
D.The Meridian was cleared by a senior agent.
Explanation: This applies the contrapositive of a conditional: if departing without clearance always produces a logged incident, and no incident was logged, then the ship did not depart without clearance. Denying the consequent validly denies the antecedent.
4Given: "Every classified file is stored in the secure vault. Some secure-vault items are paper documents." Which conclusion is supported?
A.It is possible that some classified files are paper documents.
B.All paper documents are classified files.
C.No classified file is a paper document.
D.Every secure-vault item is a classified file.
Explanation: Because all classified files sit in the vault and some vault items are paper, the categories can overlap, so it is possible some classified files are paper documents. The premises permit but do not require this overlap, making 'possible' the supportable claim.
5A passage reads: "Either the witness was mistaken, or the timestamp on the badge log is wrong. The timestamp on the badge log was verified as correct." What follows?
A.The witness was mistaken.
B.Both the witness and the log were wrong.
C.Neither the witness nor the log was wrong.
D.The badge log must be discarded.
Explanation: This is a disjunctive syllogism. In an 'either/or' where one disjunct (the timestamp being wrong) is ruled out, the other disjunct (the witness was mistaken) must hold. Eliminating one alternative confirms the remaining one.
6Statements: "All certified interrogators completed the advanced course. Some agents in the unit are certified interrogators." Which inference is valid?
A.Some agents in the unit completed the advanced course.
B.All agents in the unit completed the advanced course.
C.No agent in the unit completed the advanced course.
D.Only certified interrogators are in the unit.
Explanation: If some unit agents are certified interrogators and all certified interrogators completed the course, then those particular agents completed it, so 'some agents in the unit completed the course' is valid. The conclusion stays limited to the 'some' established by the premise.
7A briefing states: "Whenever the network alarm triggers, a duty officer is notified within five minutes. The network alarm triggered at 0300." Which conclusion is best supported?
A.A duty officer was notified by about 0305.
B.The network alarm was a false positive.
C.The duty officer triggered the alarm.
D.No notification was sent because it was night.
Explanation: Applying the conditional rule: an alarm trigger guarantees notification within five minutes, so a 0300 trigger means a duty officer was notified by roughly 0305. This is straightforward affirmation of the antecedent (modus ponens).
8Read: "All evidence transfers require two signatures. Document 14-B has only one signature." Which conclusion is valid?
A.Document 14-B is not a completed evidence transfer.
B.Document 14-B is forged.
C.Document 14-B requires no signatures.
D.All single-signature documents are evidence transfers.
Explanation: A completed evidence transfer requires two signatures; with only one signature, Document 14-B fails that requirement and therefore is not a completed evidence transfer. This is a valid application of the necessary-condition rule.
9A passage states facts about a duty roster: "Petty Officer Lane works every shift that Chief Diaz works. Chief Diaz worked the Tuesday night shift." What follows?
A.Petty Officer Lane worked the Tuesday night shift.
B.Chief Diaz works every shift Lane works.
C.Lane worked more shifts than Diaz.
D.Diaz and Lane never work together.
Explanation: Since Lane works every shift Diaz works, and Diaz worked Tuesday night, Lane also worked Tuesday night. The relationship is one-directional from Diaz's shifts to Lane's attendance.
10Consider: "If the informant is reliable, then the tip is actionable. The tip is not actionable." Which is a valid conclusion?
A.The informant is not reliable.
B.The informant is reliable.
C.The tip came from a different source.
D.The tip is actionable after review.
Explanation: This is modus tollens: denying the consequent ('the tip is not actionable') validly denies the antecedent ('the informant is not reliable'). The contrapositive is logically equivalent to the original conditional.
About the NCIS Special Agent Practice Questions
Verified exam format metadata for NCIS Special Agent (1811) Selection Exam — Phase I Cognitive/Logical Reasoning is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.