Visa BASE I/II Specifics Quiz

Test your understanding of Visa's ISO8583 implementation, private data elements, TLV parsing, and network-specific requirements.

Get every question correct to pass this checkpoint. You can review feedback, revise your answers, and submit again.

1. An authorization is approved. Which later state is still distinct?

Select one answer.

Clearing/settlement completion MTI digit count Whether ASCII has bytes Whether 00 is two characters

2. The course DE63 envelope starts with VS. What does this prefix prove?

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A valid MAC Successful settlement Authenticated Visa origin Only that the parsed label matches the course format

3. A target exercise profile requires hex-ASCII bitmaps. Eight binary bitmap bytes become how many ASCII characters?

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64 4 8 16

4. A profile supplies separate authorization and verification-result fields. Can an approval coexist with a negative verification result?

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It always proves fraud Only if the bitmap is corrupt It can, if that profile and issuer decision permit it Never under any profile

5. A DE12 field contains only 003000. What extra context is needed for reliable conversion across a timezone date boundary?

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Only the amount Only the MTI The transaction date and timezone policy No context is needed

6. The course adapter removes outer track sentinels. What should happen to an already sentinel-free value?

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Convert it to an integer Prefix VS Remove its first and last data digits Its content remains unchanged

7. Course bytes Z02AB follow the VS envelope. What are tag, length, and value?

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Z0, 2, AB Z, 4, 02AB Z, 0x02AB, empty Z, 2, AB

8. The exercise maps DE22=051 to DE62=P2. What does that mapping establish outside the exercise?

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No proof of actual PIN verification That a PIN was entered Universal Visa certification That a PIN was correct

9. A merchant-advice field is received on a new route. Where should retry instructions come from?

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The last decimal digit of the PAN The versioned route/profile definition A tag table copied from an unrelated network A guessed meaning based on field length

10. A gateway changes routes while preserving only STAN. What additional design check is needed?

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Whether STAN is numeric only Whether the destination matching key needs other original fields Whether every network uses the same key Whether response code can replace correlation

11. In the course convention, why distinguish an authorization exchange from a financial exchange?

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The amount always has different units Their bitmaps cannot contain the same fields Their business effects and subsequent lifecycle requirements differ One has no response

12. The course parser rejects an envelope starting MC. What can it conclude?

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The envelope is outside its expected VS format It is definitely an authentic Mastercard message Its transaction was declined Its MAC is invalid

13. A duplicate response is detected for an already applied transaction. What invariant should hold?

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Every duplicate creates another charge The second response is necessarily malicious The response must be discarded without audit state Business effects are applied at most once under the same identity

14. Can the course one-byte-tag DE63 parser be reused unchanged for EMV BER-TLV?

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Yes if values are printable Yes if the field number is odd Yes; all TLV schemas are identical No; tag and length framing rules differ

15. A response lacks DE63. Which conclusion is justified without its profile?

Select one answer.

Visa rejected it before assigning an ID The packet is necessarily truncated The transaction definitely succeeded Its requirement and significance are undetermined

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