Question

10. AU.S. phone number consists of three sections: (1) Area code (null or three digits); (2) prefix code (three digits); and (3) postfix code (four digits). Area code - it can be null or consists of three digits Prefix code - it consists of three digits with non-ZERO or non-ONE as the first digit in the Prefix code section, i.e. 334-123-4567 is invalid because the first digit in the Prefix code is ONE. Postfix code - it consists of four digits. Please list all possible test cases to expose vulnerabilities for the following three tests. (Hints: please consider non-numeric values, such as characters) a. Area code test. b. Prefix code test. c. Postfix code test.

Answer 1

Answer :

a. Area code test :

START ACCEPT yes 15 The seld TULL No SF MY REJECT Digit number Hes Another Digit? Ho Tyes 2nd No Digittemberg Tyes Another Mo Rigt? lyes grad No Digit Number Jyes Another Yes No Digit?

Above flowchart can be used to determine whether the given area code is valid or not.

Test Cases :

Following are Valid area codes :

1. Null

2. 123

3. 111

Following are Invalid area codes :

1. a12

2. 1#2

3. 3#a

4. abc#

b. Prefix code test :

the field rule Y REJECT START yes the test Digit orfor Chcroder (No Another Ho Digila yes Digit Tomke lyes Thother Ho Pigit? Tres Ho उन्त Dig thanh Tres yos Another Digit? INO ACCEPT

Above flowchart can be used to determine whether the given prefix code is valid or not.

Test Cases :

Following are Valid prefix codes :

1. 234

2. 223

3. 222

Following are Invalid prefix codes :

1. 023

2. 123

3. 23a

4. #34

5. a#5

c. Postfix code test :

START s yes REJECT the field TEULL ist fo Digit from Iyes Mo An thes Digit Jies Ind Ho Digit Trung eyes Trother Righ Les Rigit reum Iyes And then Det Tres th ilo Dietrem Lies ACCEPT yes Digist Ho

Above flowchart can be used to determine whether the given postfix code is valid or not.

Test Cases :

Following are Valid postfix codes :

1. 1234

2. 1123

3. 1112

4. 1111

5.1231

Following are Invalid postfix codes :

1. a123

2. 1#23

3. a#24

4. aaaa

5. a#a#