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16 Oct 2023, 04:12
Kudos
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How many 3-character alphanumeric sequences can appear as the 5th, 6th, and 7th
characters of a valid CID under Proposal 2?
a. 1,000
b. 10,648
c. 17.576
d. 32,768
e. 46,656
I don't understand why the correct answer is D. Can anyone explain?
Btw i Cannot post pictures so if anyone could find the question please. But here are the informations that i could copy from the question.
Proposal 1 states this:
This proposal satisfies database constraints and produces meaningful CIDs by using the first three allowable alphanumeric characters from the customer's email address followed by a portion of the timestamp of her first purchase.
Has an image to illustrate this.
Customer identifiers tab states this:
To comply with laws regarding the use of personally identifiable information, a certain company must adopt a new way of determining its customer identification numbers (CIDs) in its customer records database. Proposals are being considered on the basis of the following principles:
• Database Constraints: Each character in each CID must be from the following table: The table contains 26 letters of the alphabet and the numbers from 0 to 9.
• Error Checking: There must be some mechanism for determining if a CID could be valid without checking the database.
• Meaningful: Each CID must reflect some information about the customer to which it is assigned.
Whichever proposal is adopted, the new CIDs will be issued to all former customers currently in the database.
Proposal 2 states this:
This proposal is an extension of Proposal 1. Under this proposal, a customer's CID will consist of three parts in the following order:
1. Four randomly generated digits
2. The CID generated as in Proposal 1 after being transformed per the Character
Transformation Table. That says as follows:
Replace the following letters individually: R S T A I O U ---- with the following letters in their respective order: S T R E E E E
3. A single check digit equal to the units digit of the sum of all numeric characters in the first two parts
characters of a valid CID under Proposal 2?
a. 1,000
b. 10,648
c. 17.576
d. 32,768
e. 46,656
I don't understand why the correct answer is D. Can anyone explain?
Btw i Cannot post pictures so if anyone could find the question please. But here are the informations that i could copy from the question.
Proposal 1 states this:
This proposal satisfies database constraints and produces meaningful CIDs by using the first three allowable alphanumeric characters from the customer's email address followed by a portion of the timestamp of her first purchase.
Has an image to illustrate this.
Customer identifiers tab states this:
To comply with laws regarding the use of personally identifiable information, a certain company must adopt a new way of determining its customer identification numbers (CIDs) in its customer records database. Proposals are being considered on the basis of the following principles:
• Database Constraints: Each character in each CID must be from the following table: The table contains 26 letters of the alphabet and the numbers from 0 to 9.
• Error Checking: There must be some mechanism for determining if a CID could be valid without checking the database.
• Meaningful: Each CID must reflect some information about the customer to which it is assigned.
Whichever proposal is adopted, the new CIDs will be issued to all former customers currently in the database.
Proposal 2 states this:
This proposal is an extension of Proposal 1. Under this proposal, a customer's CID will consist of three parts in the following order:
1. Four randomly generated digits
2. The CID generated as in Proposal 1 after being transformed per the Character
Transformation Table. That says as follows:
Replace the following letters individually: R S T A I O U ---- with the following letters in their respective order: S T R E E E E
3. A single check digit equal to the units digit of the sum of all numeric characters in the first two parts
16 Oct 2023, 04:21
Kudos
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Also, i understand why E isn't the correct question as only the 5th and 6th are letters, while the 7th is just numbers. If all were a combination of letters and numbers it would be 36^3 which would be equal to option e. But I still cannot get option D, with any of my reasonings.
Thank you in advance for the help!
Thank you in advance for the help!
