FREE USPS Error Detection Test Identifying Identical Pairs 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?

Accepted Answer

A) 90176-44G5 / 90176-44G5

Answer

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?

Accepted Answer

C) Label: 987 OAK LN # 22 / Manifest: 987 OAK LN APT 22

Answer

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?

Accepted Answer

B) 4921-7B3-PQW / 4921-7B3-POW

Answer

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?

Accepted Answer

B) 1954 S PARKER RD 3A / 1945 S PARKER RD 3A

Answer

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?

Accepted Answer

D) Source: 7731-9021 / Entry: 7731-9021

Answer

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.

USPS Error Detection Test Practice Test

USPS Error Detection Test Practice Test

FREE USPS Error Detection Test Identifying Identical Pairs Questions and Answers