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Numeric and Alphanumeric Comparison Flashcards

6 cards from real USPS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Numeric and Alphanumeric Comparison flashcards as text

  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

    Answer: 3

    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.

  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:

    Answer: 1075 N PINE AVE

    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.

  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?

    Answer: A: 10011-2839 | B: 10011-2893

    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.

  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

    Answer: Position 10

    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.

  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

    Answer: The records differ only in the last name.

    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.

  6. Which of the following lines contains an error when compared to the reference address: '16901-4427 SW 87TH CT UNIT #G-3'?

    Answer: 16901-4427 SW 78TH CT UNIT #G-3

    The line '16901-4427 SW 78TH CT UNIT #G-3' incorrectly lists the street as '78TH' instead of '87TH'. This is a numeric transposition error, a common mistake in data entry.