USPS Error Detection Alphanumeric Code Verification Questions and Answers

Question 1

A mail handler is looking for a specific tray in a staging area. The system-assigned ID for the tray is 'A404 789B 11C'. Which of the following physical tray labels is the correct match?

Accepted Answer

A404 789B 11C

Answer

The task is a direct one-to-one comparison. The code 'A404 789B 11C' is an exact match to the system-assigned ID. The other options contain common errors: B has a substitution ('I' for '1'), C has a substitution ('O' for '0'), and D has a transposition ('98' instead of '89').

Question 2

A handwritten form shows the code 'G5S1I0Z2'. An operator keys in 'GSSIIOZZ'. This entry contains multiple substitution errors based on common misinterpretations of characters. How many characters were incorrectly substituted?

Accepted Answer

Four

Answer

There are four substitution errors. The '5' was mistaken for an 'S'. The '1' was mistaken for an 'I'. The '0' was mistaken for an 'O'. The '2' was mistaken for a 'Z'. These are common errors when reading handwritten or poorly printed characters.

Question 3

While auditing a series of package identification codes, you must flag any entry that has more than one error. Which of the following pairs contains exactly two errors when comparing the 'Entered' code to the 'Correct' code?

Accepted Answer

Correct: 9F8W-T6R2-A / Entered: 9F9W-T6R1-A

Answer

Comparing the correct code '9F8W-T6R2-A' to the entered code '9F9W-T6R1-A', we can identify two distinct substitution errors. The '8' was incorrectly entered as a '9', and the '2' was incorrectly entered as a '1'. The other pairs contain one error or no errors.

Question 4

A mail handler is keying a routing code for a large container of Priority Mail. The correct code is 'MCI641-T5', which routes to Kansas City. If the handler mistakenly enters 'ATL641-T5', what is the most immediate and significant consequence of this alphanumeric error?

Accepted Answer

The container will be misrouted to a different processing facility (Atlanta).

Answer

The first three letters of this type of routing code often correspond to a specific facility (e.g., MCI for Kansas City, ATL for Atlanta). A substitution error in this critical part of the code will cause automated systems to send the container to the wrong destination, resulting in significant delays and logistical problems.

Question 5

You are verifying a set of manually entered tray IDs against a master list. Which of the following pairs contains a substitution error?

Accepted Answer

Master: F1R5Z9G0E / Entered: F1R5Z9GOE

Answer

A substitution error occurs when a correct character is replaced with an incorrect one. In option A, the number '0' in the master list was incorrectly entered as the letter 'O', which is a common substitution error.

USPS Error Detection Test Practice Test

USPS Error Detection Test Practice Test

USPS Error Detection Alphanumeric Code Verification Questions and Answers