Unit 3: Advancement in Dermatoglyphics - Practice Quiz

1 What does the acronym AFIT stand for?

2 What is the primary function of an AFIT system?

3 AFIT primarily relies on identifying which fingerprint features for matching?

4 Which major agency is well known for using an advanced AFIT system?

5 What is biometric identification?

6 Which of the following is an example of a biometric trait?

7 Why are fingerprints considered ideal for biometric identification?

8 Which of the following is a behavioral biometric rather than a physical one?

9 Micro X-ray fluorescence (MXRF) detects fingerprints by mapping which components in the residue?

10 A key advantage of micro X-ray fluorescence for fingerprint analysis is that it is:

11 Micro X-ray fluorescence uses which form of radiation to analyze fingerprints?

12 Color changing films help in fingerprint development by producing what effect?

13 The main benefit of using color changing films in fingerprint development is:

14 Color changing films typically respond to which fingerprint deposit?

15 Which technique is commonly used to develop fingerprints on metal objects?

16 Fingerprint corrosion on metal surfaces occurs because sweat residues can do what to the metal?

17 Advanced techniques can sometimes recover fingerprints from washed surfaces because:

18 Recovering prints from washed metal often relies on which underlying phenomenon?

19 A non-invasive fingerprint development technique is one that:

20 Which of the following is considered a non-invasive fingerprint detection method?

21 AFIT replaced the earlier IAFIS matching algorithm primarily to improve which performance metric during a search of the ten-print database?

22 A latent examiner submits a partial print to an AFIS. The system returns a ranked candidate list rather than a single positive identification. Why does the system behave this way?

23 During AFIS processing, minutiae such as ridge endings and bifurcations are converted into a mathematical template. What is the main advantage of this approach?

24 A biometric system is evaluated using its False Acceptance Rate (FAR) and False Rejection Rate (FRR). Increasing the matching threshold to be stricter will most likely have what effect?

25 The point where the False Acceptance Rate equals the False Rejection Rate in a biometric system is known as the:

26 Fingerprint biometrics are classified as a 'physiological' rather than 'behavioral' trait. Which characteristic best justifies this classification?

27 Micro X-ray fluorescence (micro-XRF) develops a fingerprint by mapping the distribution of which component within the residue?

28 A key advantage of using micro-XRF for fingerprint visualization over conventional powders is that it:

29 Why is micro-XRF particularly useful for recovering prints on surfaces where optical and powder methods fail?

30 Color-changing (chromogenic) films used in fingerprint development produce a visible print mainly through which mechanism?

31 An investigator selects a color-changing film over standard powder dusting for a delicate document. What is the most likely reason?

32 Color-changing film techniques improve latent print visibility primarily by increasing which optical property between ridges and background?

33 On a fired cartridge case, latent prints are often difficult to recover because sweat components interact with the metal. Which technique exploits this corrosion for visualization?

34 Gun bluing solutions are sometimes used to develop fingerprints on metal because they:

35 Why can latent prints sometimes be recovered from a metal surface even after the visible residue has been wiped away?

36 Fingerprints can sometimes still be developed on a washed surface because certain residue components:

37 An examiner processes a bottle that was submerged in water using small particle reagent (SPR). SPR is effective on wet surfaces because it:

38 When developing prints from a surface exposed to water, which residue component is generally lost first?

39 Optical detection methods (e.g., using oblique lighting or fluorescence) are considered non-invasive primarily because they:

40 An examiner chooses to photograph a latent print under alternate light source (ALS) fluorescence before applying any powder. What is the main strategic reason?

41 AFIT replaced the older IAFIS matching algorithm within the FBI's Next Generation Identification (NGI) system. A latent examiner notices that AFIT returns a substantially higher lights-out accuracy rate for ten-print searches than the legacy system. Which combination of technical improvements is the primary driver of this gain?

42 An AFIT search of a distorted latent returns a candidate list ranked by matcher score. The top candidate has a high score but the examiner's ACE-V analysis concludes exclusion. What does this scenario best illustrate about AFIT's role?

43 A biometric fingerprint system is tuned by adjusting its decision threshold. As the operator lowers the threshold to reduce the False Rejection Rate (FRR), what is the necessary trade-off, and what metric describes the point where the two error rates are equal?

44 A vendor claims their fingerprint biometric is protected against presentation (spoof) attacks using a gelatin fake finger. Which anti-spoofing approach detects the fake by measuring an intrinsic physiological property rather than the ridge pattern itself?

45 Micro-X-ray fluorescence (-XRF) is prized for fingerprint imaging because it maps the elemental composition of residue. On a surface where optical and powder methods fail, which property makes -XRF succeed?

46 A key advantage of -XRF over conventional development sequences in casework is best described as which of the following?

47 Certain thin metal or polymer films change color when a latent print contacts them, producing ridge detail through interference or chemical reaction. What is the fundamental mechanism by which many thin-film optical systems render the ridge pattern visible?

48 A forensic chemist selects a color-changing film reagent that responds specifically to a particular class of eccrine constituents. To maximize ridge contrast on a fresh latent, the film should react preferentially with which component?

49 Fingerprints on metal cartridge cases are notoriously difficult because handling and firing remove most residue, yet sweat can still chemically interact with the metal. Which technique exploits the corrosion of the metal by sweat constituents to recover such prints?

50 An examiner uses electrostatic or electrodeposition-based enhancement on a conductive metal surface. Why can an applied potential improve ridge development compared with simple powdering?

51 Prints can sometimes be recovered even after a surface has been washed. Which physicochemical explanation best accounts for the persistence of ridge detail on washed non-porous surfaces?

52 A vehicle recovered from water is processed for prints on its exterior metal. Given the loss of soluble residue, which strategy offers the best chance of recovering ridge detail from these washed/submerged surfaces?

53 A latent on a document of high evidentiary value must be visualized without any chemical or physical alteration so the document remains pristine for other examinations. Which non-invasive technique is most appropriate as a first step?

54 Why is the principle of sequencing critical when a non-invasive technique is combined with later chemical development in a processing scheme?

55 Vacuum Metal Deposition (VMD) using gold followed by zinc is applied to a metal surface. What explains the characteristic 'reverse development' where the background darkens and ridges stay light?

56 A large-scale one-to-many biometric identification database experiences degraded accuracy as it grows. Which statement correctly captures why identification (1:N) is inherently harder than verification (1:1) at scale?

57 When AFIT enrolls a ten-print card, it assigns an image-quality metric (e.g., NFIQ) to each impression. How does this quality scoring most directly improve downstream matching performance?

58 A limitation of -XRF for latent print imaging arises when the residue and substrate share overlapping elemental signatures. What is the consequence, and how is it typically mitigated?

59 Compared with conventional powder dusting, a key practical advantage claimed for color-changing film techniques on multicolored or patterned substrates is best explained by which reasoning?

60 Two identical mugs are handled, then one is rinsed in cold water and the other in hot soapy water. The hot-soapy mug yields markedly poorer print recovery. Which explanation is most consistent with residue chemistry?