Free USPS Error Detection Test Numeric and Alphanumeric Comparison Questions and Answers 1

Question 1

When comparing the two alphanumeric strings below, how many individual characters are incorrect in String B when compared to String A?

String A: APT 98C-2, 4773 W ELM ST
String B: APT 89C-Z, 4737 W ELM ST

Accepted Answer

3

Answer

There are exactly three character errors: the '8' in '89C' should be a '9', the 'Z' should be a '2', and the second '3' in '4737' should be a '7'. Each substitution counts as one error.

Question 2

A data entry operator is comparing a handwritten address to a system-generated label. Which of the following pairs contains a common alphanumeric substitution error?

Handwritten: 1O7S N PINE AVE
System Label:

Accepted Answer

1075 N PINE AVE

Answer

The most common and plausible substitution error is mistaking the handwritten letter 'S' for the number '5'. The other options either represent a different type of error or are less common substitutions.

Question 3

An error known as a 'transposition' occurs when two adjacent characters are swapped. Which of the following pairs of ZIP+4 codes demonstrates a single transposition error?

Accepted Answer

A: 10011-2839 | B: 10011-2893

Answer

In this pair, the '3' and the '9' in the +4 code of String A have been swapped in String B, which is a classic example of a transposition error. The other pairs show substitution errors, not transpositions.

Question 4

A mail sorting machine reads two address lines from a database to check for consistency. At which character position does the first error appear when comparing Line 2 to Line 1?

Line 1: 21540-3380 OAKLEAF LN
Line 2: 21540-338O OAKLEAF LN

Accepted Answer

Position 10

Answer

The first 9 characters (the ZIP code and hyphen) match perfectly. The first discrepancy occurs at the 10th character, where Line 1 has a zero ('0') and Line 2 has a letter 'O'. This is a common data entry error.

Question 5

During a quality check, you must identify if the following two customer records are identical. Which statement correctly describes the comparison?

Record 1: J. Stephenson | 8081 N MAGNOLIA AVE STE 14B
Record 2: J. Stevenson | 8081 N MAGNOLIA AVE STE 14B

Accepted Answer

The records differ only in the last name.

Answer

The only difference between the two records is the spelling of the last name: 'Stephenson' versus 'Stevenson'. The street address, including the suite number, is identical in both records.

USPS Error Detection Test Practice Test

USPS Error Detection Test Practice Test

Free USPS Error Detection Test Numeric and Alphanumeric Comparison Questions and Answers 1