Fig. 1 shows a section of a game program that validates a move on a 10 by 10 board. The player enters a row number into row. The program should reject row n...
Question 1 Report
Fig. 1 shows a section of a game program that validates a move on a 10 by 10 board. The player enters a row number into row. The program should reject row numbers outside 1 to 10. A message is displayed when the entered row is invalid.
(a) Explain why the relational tests are joined with OR. [1]
(b) When row is 0, state the path followed. [1]
(c) When row is 10, state the path followed. [1]
(d) When row is 14, explain which relational test is true. [1]
(e) When the board is changed to 12 rows, write the amended invalid-row condition. [1]
The canteen's allergy checker compares a selected meal code with a restricted code held in restrictedMeal. The code chosen by a student is stored in mealCode. If the two values are equal, the program must display a message and call a subroutine that suggests an alternative meal.
(a) Explain the Boolean result when mealCode = "P17" and restrictedMeal = "P17". [1]
(b) When the codes are "P17" and "V04", state the result of mealCode = restrictedMeal. [1]
(c) When the codes are equal, write two commands that could form the THEN block. [2]
Answer Details
Game-board validation
ORis used because a row is invalid if it is below the minimum of 1 or above the maximum of 10. It cannot be both at once. [1]- When
rowis 0,row < 1is true. The flowchart follows the true path toInvalid move. [1] - When
rowis 10, neitherrow < 1norrow > 10is true. It follows the false path toMake move. [1] - When
rowis 14, the true relational test isrow > 10. [1] - For a 12-row board, the invalid-row condition is:
row < 1 OR row > 12[1]
Allergy checker
- If both codes are
"P17", they are equal, somealCode = restrictedMealis true. [1] - If the codes are
"P17"and"V04", they differ, so the equality test is false. [1] - A suitable
THENblock is:DISPLAY "Restricted meal selected"
CALL suggestAlternative()
The display warns the user and the subroutine provides the required alternative-meal action. [2]
Download The App On Google Playstore
Everything you need to excel in your exams
