Question

Assume you have created a program that has the user enter an email address of the form: [e-mail] An extension for the email should be three letters (no numbers or other characters). List four types of input errors your program should test for.

Answer 1

Answer:

Four types of errors program should test for user input are given in explanation

Explanation:

1. Program should test that extension contains exactly three letters

2. Program should test that extension doesn't contain any number or special character

3. Program should test that extension doesn't contain any white space  

4. Program should test that extension doesn't contain any punctuation mark