Free USPS Error Detection Test Identifying Identical Pairs Questions and Answers 1 — Questions and Answers
Question 1: You are verifying data consistency between a primary and a backup file. Which of the following pairs of alphanumeric strings is identical?
- A) 90176-44G5 / 90176-44G5 (Correct answer)
- B) 8B432-H9P1 / 8B432-H9P1I
- C) 7320K-L289 / 7320K-1289
- D) 45591-3A7C / 45591-3A7C
Correct answer: A) 90176-44G5 / 90176-44G5
The pair in option A is the only one where both strings match exactly in sequence, character type, and length. Option B has an extra character 'I' at the end of the second string (an insertion error). Option C has a character substitution ('L' for '1'). Option D has a trailing space in the second string, making it different.
Question 2: A mail handler is sorting packages and must identify any discrepancies between the label and the manifest. Which pair below shows an error in the secondary address unit designator?
- A) Label: 123 MAIN ST APT 4B / Manifest: 123 MAIN ST APT 4B
- B) Label: 500 ELM AVE STE 101 / Manifest: 500 ELM AVE SUITE 101
- C) Label: 987 OAK LN # 22 / Manifest: 987 OAK LN APT 22 (Correct answer)
- D) Label: 456 PINE RD BLDG C / Manifest: 456 PINE RD BLDG C
Correct answer: C) Label: 987 OAK LN # 22 / Manifest: 987 OAK LN APT 22
Option C shows a discrepancy between the secondary unit designators '#' and 'APT'. While both might lead to the same location, they are not identical strings. Option B uses a non-standard abbreviation ('SUITE') versus the USPS-preferred 'STE', but the question asks for an error in the designator itself, and C presents a clearer conflict between two distinct designators. Options A and D are exact matches.
Question 3: During a data audit, you must flag any record pairs that are not perfect matches. Which of the following pairs contains a single character substitution error?
- A) KMR-81G-2V90 / KMR-81G-2V9
- B) 4921-7B3-PQW / 4921-7B3-POW (Correct answer)
- C) 3477-LMN-6Y5 / 3477-LMN-6Y5
- D) JFX-55R-T8E2 / JFX-55-RT8E2
Correct answer: B) 4921-7B3-PQW / 4921-7B3-POW
In option B, the character 'Q' in the first string has been substituted with the character 'O' in the second string. Option A demonstrates an omission error (missing '0'). Option C is an identical pair. Option D has both a substitution ('R' for '-') and a transposition ('RT' for 'T-R').
Question 4: An automated system compares two addresses to merge duplicate customer accounts. It flags pairs that are not identical. Which of the following pairs should be flagged for review due to a numeric transposition error?
- A) 20387 NW 114TH AVE / 20387 NW 114TH AVE
- B) 1954 S PARKER RD 3A / 1945 S PARKER RD 3A (Correct answer)
- C) 4660-8912 OAK ST / 4660-8921 OAK ST
- D) 7113 N MAGNOLIA CT / 7113 N MAGNOLIA ST
Correct answer: B) 1954 S PARKER RD 3A / 1945 S PARKER RD 3A
Option B shows a classic transposition error where two adjacent digits in the street number, '54', have been swapped to '45'. Option C also contains a transposition, but in the ZIP+4 code, not the primary street number. Option D shows a substitution error in the street suffix ('CT' vs 'ST'). Option A is an identical match.
Question 5: When proofreading a data entry batch against a source document, which of the following pairs is an exact match according to USPS data standards, which typically ignore punctuation?
- A) Source: PO BOX 1800 / Entry: P.O. BOX 1800
- B) Source: 1420-A N MAIN ST / Entry: 1420 A N MAIN ST
- C) Source: 500 E MAIN ST, ANYTOWN / Entry: 500 E MAIN ST ANYTOWN
- D) Source: 7731-9021 / Entry: 7731-9021 (Correct answer)
Correct answer: D) Source: 7731-9021 / Entry: 7731-9021
Option D is the only pair that is truly identical, character for character. While USPS systems can often interpret and standardize the variations in options A, B, and C, the core task of identifying identical pairs requires an exact match. The strings in A, B, and C contain different characters (periods, hyphens vs spaces, commas) and are therefore not identical.
Question 6: A quality control specialist is reviewing pairs of tracking numbers for errors. Which pair demonstrates a single omission error in the second number?
- A) 9400 1118 9956 1234 5678 90 / 9400 1118 9956 1234 5678 90
- B) 7812 3456 9012 3456 7890 12 / 7812 3456 9012 3456 7890 123
- C) 4591 0001 2345 6789 0123 45 / 4591 001 2345 6789 0123 45 (Correct answer)
- D) 8823 4567 1098 7654 3210 98 / 8823 4567 1098 7564 3210 98
Correct answer: C) 4591 0001 2345 6789 0123 45 / 4591 001 2345 6789 0123 45
In option C, the second number is missing one of the '0's from the '0001' block of the first number, making it an omission error. Option A is an identical pair. Option B has an extra digit at the end of the second number (an insertion error). Option D has a transposition error ('65' vs '56') in the fourth block.
Free USPS Error Detection Test Identifying Identical Pairs Questions and Answers 1
You are verifying data consistency between a primary and a backup file.
Which of the following pairs of alphanumeric strings is identical?