CASS Software Certification & Testing 5 — Questions and Answers
Question 1: Which scenario would most likely cause a CASS match to fail even when a legitimate address exists?
- The address was built after the current CASS database cycle was compiled (Correct answer)
- The address uses a non-standard directional abbreviation
- The ZIP Code is entered without the +4 extension
- The street suffix is abbreviated differently than standard
Correct answer: The address was built after the current CASS database cycle was compiled
New construction addresses built after the database compilation date won't appear in the CASS database, causing a legitimate address to fail matching.
Question 2: In CASS software certification, what is a 'cycle file'?
- The standardized USPS test file used to evaluate software accuracy during certification (Correct answer)
- A rotating backup of the AMS database updated monthly
- A log file that records every address processed during a mailing campaign
- A configuration file that sets processing parameters for each certification run
Correct answer: The standardized USPS test file used to evaluate software accuracy during certification
The cycle file is the standardized USPS-provided test dataset that vendors must process correctly to earn or renew CASS certification.
Question 3: A mailer processes 500,000 addresses and CASS software updates 12,000 ZIP+4 codes that were previously missing. What is the correct term for this process?
- ZIP+4 append (Correct answer)
- Address standardization
- DPV confirmation
- Presort coding
Correct answer: ZIP+4 append
ZIP+4 append refers specifically to the CASS process of adding the 4-digit extension to addresses that only contained the 5-digit base ZIP Code.
Question 4: Which software testing principle is most directly applied when CASS developers test address matching at the boundary between valid and invalid ZIP Code ranges?
- Boundary value analysis (Correct answer)
- Equivalence partitioning
- Decision table testing
- State transition testing
Correct answer: Boundary value analysis
Boundary value analysis tests the edges of valid input ranges, such as the first and last valid ZIP Codes, where software errors are most likely to occur.
Question 5: What is the maximum number of characters allowed in the delivery address line on a standard USPS mailpiece processed by CASS software?
- 28 characters (Correct answer)
- 32 characters
- 40 characters
- 24 characters
Correct answer: 28 characters
USPS Publication 28 specifies a maximum of 28 characters per line for the delivery address line on standard mailpieces.
Question 6: Which approach does CASS certification testing use to evaluate software handling of 'throwback' addresses — addresses where the city name doesn't match the ZIP Code?
- The software must correct the city name to match the ZIP Code's preferred city name (Correct answer)
- The software must reject the address entirely as undeliverable
- The software must retain the original city name as entered
- The software must split the record into two separate candidates
Correct answer: The software must correct the city name to match the ZIP Code's preferred city name
CASS software is required to override the input city name with the USPS preferred city name associated with the given ZIP Code.
Question 7: A software development team is creating a CASS module and wants to verify that the DPV confirmation component interacts correctly with the ZIP+4 lookup component. Which type of testing addresses this?
- Integration testing (Correct answer)
- Unit testing
- System testing
- Regression testing
Correct answer: Integration testing
Integration testing verifies that separate software components — like the DPV module and the ZIP+4 lookup module — work correctly together when combined.
CASS Software Certification & Testing 5
Which scenario would most likely cause a CASS match to fail even when a legitimate address exists?