Question 1
Identify the confounding variable in a study where diet quality affects both participation and health outcomes.
Correct Answer:
Diet quality
Explanation:
A confounding variable is something that influences both the exposure and the outcome, creating a false impression of a link between them. In this study, diet quality affects whether people participate and also affects health outcomes. Because diet quality is related to participation and independently related to health, it can distort the apparent effect of participation on health. If you don’t account for diet quality, you might incorrectly conclude that participation alone drives health differences when, in fact, healthier individuals are simply more likely to participate and to have better health outcomes due to their diet. By adjusting for diet quality—through stratification, covariate adjustment, or matching—you get a clearer view of the true effect of participation on health.
Question 2
What is a primary tactic in de-escalation to prevent the need for force?
Correct Answer:
Use communication
Explanation:
In de-escalation, talking with the person and using calm, respectful communication is the main tool to prevent force. When you speak in a steady tone, listen actively, acknowledge the other person’s feelings, and give options and boundaries, you reduce fear and aggression. This helps the other person feel heard and understood, which lowers adrenaline and makes it easier to find a peaceful resolution. Clear dialogue creates time and space for thoughts to settle, so cooperation can emerge without coercion. Increasing force tends to raise tension and provoke resistance, which is exactly the opposite of de-escalation. Ignoring the situation leaves risk unaddressed and can allow things to spiral. Delaying action can be appropriate in specific scenarios, but without a plan, it doesn’t directly prevent the need for force. So, using effective communication is the best approach to prevent having to resort to force.
Question 3
Which item should be submitted to the lab for latent prints?
Correct Answer:
Paper documents
Explanation:
Latent prints on porous surfaces require chemical development best done in a controlled lab environment. Paper documents are porous, so the sweat and oils that make up latent prints can be absorbed by the paper fibers, making them harder to visualize without specialized reagents like ninhydrin or physical developer. Processing these substances in the lab ensures consistent, documented development and preserves the print for comparison. Non-porous surfaces such as glass or metal typically yield prints that can be developed or lifted with field methods (powders, cyanoacrylate fuming) or more straightforward lab techniques, so they’re often more readily processed on scene or with simpler methods. Doors and frames can be variably porous, but the classic, more challenging latent prints on paper benefit most from lab processing. So paper documents are the best item to submit for latent print analysis because their porous nature requires the lab’s chemical processing SAMPLEto reliably reveal and preserve the print.
Question 4
In cryptography, what is a salt used for?
Correct Answer:
Random data used as an additional input to a hashing function to protect against rainbow table attacks
Explanation:
Salts are random data added to the input of a hash function to defend against rainbow table attacks. When you store a password, you generate a unique salt and compute the hash of the password combined with that salt (hash(password + salt)). The salt is stored with the hash so you can verify future logins by recomputing the hash with the same salt. Because the salt is unique per password, identical passwords produce different hashes, which prevents attackers from using precomputed tables to reverse hashes. This forces attackers to attack each password individually, making guessing far less efficient. The other options miss the purpose: a salt isn’t used to encrypt data with a secret key, it doesn’t increase encryption key length, and it isn’t about ensuring timestamp uniqueness in logs.
Question 5
When do you search your cruiser?
Correct Answer:
Beginning and end of shift / before and after every transport
Explanation:
Regular cruiser checks are about safety, readiness, and accountability. At the start of a shift you verify that all essential equipment and systems are present and functioning—radios, lights, siren, first aid kits, weapons and their security, evidence bags, and any other tools you rely on. This ensures you’re prepared for whatever comes next and that nothing is missing or faulty. Ending the shift serves a different but related purpose: it confirms nothing was left behind and that no tampering occurred while you were away. It also resets the vehicle for the next crew, reducing surprises for the next shift. Checking before and after every transport adds an important safeguard. It helps ensure the interior is free of contraband or hazards, confirms there’s nothing dangerous or prohibited in the vehicle during the move, and supports chain-of-custody if evidence or materials are involved. Together, beginning and end of shift checks plus checks around transports keep the cruiser safe, functional, and compliant with procedures.
Question 1
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Prepare with the NESTOR Session 91 Exam 1 Practice practice quiz. This question bank includes 10 questions covering affects, confounding, variable, nestor, and session. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NESTOR Session 91 Exam 1 Practice

This practice set contains 10 questions from the matching question bank and focuses on affects, confounding, variable, nestor, and session. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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