Convert the paper incident form used at a small factory to a secure digital program. Supervisors enter a machine identifier, a short description, and a seve...

Convert the paper incident form used at a small factory to a secure digital program. Supervisors enter a machine identifier, a short description, and a severity level from 1 to 5. A technician notices that descriptions copied from another system can include hundreds of characters. These long entries make the incident list slow to load and can hide important text on screen. The new program must protect the database while still allowing a supervisor to describe the fault clearly.

(a) Explain why the description field should have a maximum length. [1]
(b) When a severity level of 8 is entered, state the validation that should reject it. [1]
(c) Explain why a machine identifier should be checked before the incident is saved. [1]

Table 1 shows entries made into the quantity field of an online refill-order program. The field is intended to accept whole numbers from 1 to 50. The program uses the quantity to update stock and to calculate an invoice. A test team has entered the values below before the code is released. They want to ensure that invalid data cannot cause the program to crash or create an incorrect order.

(a) Explain why the entry 2.5 should be rejected. [1]
(b) When the user enters 51, state the validation check that fails. [1]
(c) Explain why the value seven could cause an error if it is used directly in a calculation. [1]