USPS - Error Detection Test Error Detection Alphanumeric Code Verification 1 — Questions and Answers
Question 1: Compare the following two codes: 7MT-2264-QX8 and 7MT-2264-QX8. Is there an error?
- No error — the codes are identical (Correct answer)
- Yes, there is an error in the first group of characters
- Yes, there is an error in the second group of characters
- Yes, there is an error in the third group of characters
Correct answer: No error — the codes are identical
Both codes read 7MT-2264-QX8 exactly. Every character in each segment matches, so there is no error.
Question 2: Compare the following two codes: PK3-8819-ZF5 and PK3-8891-ZF5. Is there an error?
- No error — the codes are identical
- Yes, there is an error in the first group of characters
- Yes, there is an error in the second group of characters (Correct answer)
- Yes, there is an error in the third group of characters
Correct answer: Yes, there is an error in the second group of characters
The second segment differs: the original reads 8819, but the copy reads 8891. The final two digits have been transposed — 19 became 91.
Question 3: Compare the following two codes: DW4-7731-HS6 and DW4-7731-HB6. Is there an error?
- No error — the codes are identical
- Yes, there is an error in the first group of characters
- Yes, there is an error in the second group of characters
- Yes, there is an error in the third group of characters (Correct answer)
Correct answer: Yes, there is an error in the third group of characters
The third segment differs: the original ends with HS6, but the copy shows HB6. The letter S has been incorrectly changed to B.
Question 4: Compare the following two codes: 6YN-4453-CX2 and 6VN-4453-CX2. Is there an error?
- No error — the codes are identical
- Yes, there is an error in the first group of characters (Correct answer)
- Yes, there is an error in the second group of characters
- Yes, there is an error in the third group of characters
Correct answer: Yes, there is an error in the first group of characters
The first segment differs: the original reads 6YN, but the copy shows 6VN. The letter Y has been incorrectly replaced with V, which looks visually similar.
Question 5: Compare the following two codes: 5JC-3384-NR1 and 5JC-3384-NR7. Is there an error?
- No error — the codes are identical
- Yes, there is an error in the first group of characters
- Yes, there is an error in the second group of characters
- Yes, there is an error in the third group of characters (Correct answer)
Correct answer: Yes, there is an error in the third group of characters
The third segment differs: the original ends with NR1, but the copy shows NR7. The digit 1 has been incorrectly changed to 7 at the very last position.
Question 6: Compare the following two codes: TH9-6627-WM4 and TH9-6672-WM4. Is there an error?
- No error — the codes are identical
- Yes, there is an error in the first group of characters
- Yes, there is an error in the second group of characters (Correct answer)
- Yes, there is an error in the third group of characters
Correct answer: Yes, there is an error in the second group of characters
The second segment differs: the original reads 6627, while the copy shows 6672. The digits 2 and 7 in the third and fourth positions have been transposed.
USPS - Error Detection Test Error Detection Alphanumeric Code Verification 1
Compare the following two codes: 7MT-2264-QX8 and 7MT-2264-QX8.
Is there an error?