Information Communication Technology ICT – 7 The systems life cycle | e-Consult

Validation routines are essential to ensure the accuracy and reliability of data entered into the student grade management program. Here are some necessary validation routines:

• Input Validation: Checks that the user has entered data in the correct format. For example, ensuring that grades are entered as numbers (e.g., 0-100) and not as text. This can involve using regular expressions or other parsing techniques.
• Range Checking: Verifies that the entered grades fall within acceptable ranges. For example, ensuring that a grade is not below 0 or above 100. This prevents invalid data from being stored.
• Data Type Validation: Ensures that variables are of the correct data type. For example, ensuring that the number of attempts is an integer.
• Required Field Validation: Checks that all required fields are filled in. For example, ensuring that a student's name and ID are entered.
• Duplicate Entry Validation: Prevents the creation of duplicate student records.

Sample Run for Testing Validation Routines:

1. Run the program.
2. Attempt to enter a grade of -50. The validation routine should prevent this and display an error message.
3. Attempt to enter a grade of 110. The validation routine should prevent this and display an error message.
4. Attempt to enter a grade of "A". The validation routine should prevent this and display an error message.
5. Attempt to save the program with a missing student ID. The validation routine should prevent this and display an error message.
6. Attempt to save the program with a duplicate student ID. The validation routine should prevent this and display an error message.

By carefully designing and testing these validation routines, the program can ensure that the student grade data is accurate and reliable.