Which of the following is MOST critical when creating data for testing the logic in a new or modified
application system?

A.
A sufficient quantity of data for each test case

B.
Data representing conditions that are expected in actual processing

C.
Completing the test on schedule

D.
A random sample of actual data

Explanation:
Selecting the right kind of data is key in testing a computer system. The data should not only include
valid and invalid data but should be representative of actual processing; quality is more important
than quantity. It is more important to have adequate test data than to complete the testing on
schedule. It is unlikely that a random sample of actual data would cover all test conditions and
provide a reasonable representation of actual data.