CH11

Question 1

Name the validity check:
Check that the input falls within a known range.

Answer 1

Range checks

Question 2

Name the validity check:
Check that the input does not exceed some maximum size e.g.
40 characters for a name

Answer 2

Size checks

Question 3

Name the validity check:
Check that the input does not include characters that should not
be part of its representation e.g. names do not include numerals.

Answer 3

Representation checks

Question 4

Name the validity check:
Use information about the input to check if it is reasonable rather
than an extreme value.

Answer 4

Reasonableness checks

Question 5

Dependabale programming validity checks include _____ checks, ______ checks, _____ checks, and ______ checks.

Answer 5

range, size, representation, reasonableness

Question 6

T/F: A program exception is an error or some unexpected event such as a power failure.

Answer 6

True

Question 7

For systems that involve long transactions or user interactions, you should always provide a ____________ capability.

Answer 7

restart

it allows the system to restart after failure without users having to redo everything that they have done.

Question 8

T/F: Restart does not depend on the type of system.

Answer 8

False, depends.

ex: Save state periodically and restart from the saved state or keep copies of forms so that users don’t have to fill them in again if there is a problem.

Question 9

__________ testing involves running the program to assess whether or not it has reached the required level of reliability.

Answer 9

Reliability (Statistical testing)

Question 10

__________ testing is testing software for reliability rather than fault detection.

Answer 10

Statistical

Question 11

T/F: Measuring the number of errors allows the reliability of the software to be predicted.

Answer 11

True.