OCR J277 - Sub-programs Revision

Modular Power 0 / 26

Modular Rank Action Scripter

Topic 2.2.10: Sub-programs

Functions, Procedures, Scope & Parameters.

1 [2 Marks]

......................... calculate_area(width, height) area = width * height ......................... area endfunction

Fill blanks (OCR Reference Language / Python).

✅ Mark Scheme

function / def
return

Score:

2 [2 Marks]

Difference between Function and Procedure?

✅ Mark Scheme

Function: Returns a value.

Procedure: Does NOT return a value (just performs an action).

Score:

3 [2 Marks]

score = 10 def update_score(): score = 50 print(score) update_score() print(score)

What is the output?

✅ Mark Scheme

50
10

Explanation: `update_score` creates a new local variable `score`. The global `score` remains 10.

Score:

4 [3 Marks]

01 function check_password(user_input) 02 user_input = input("Enter password: ") 03 if user_input == "SeCrEt" then ...

(a) Line causing Logic Error?
(b) Why?

✅ Mark Scheme

(a) Line 02

(b) The parameter `user_input` is overwritten by a new input inside the function, making the passed argument useless and the function not reusable.

Score:

5 [3 Marks]

def math_trick(a, b): c = a + b if c > 10: return c else: return c * 2 print(math_trick(5, 3))

What is the output?

a	b	c	Output

✅ Mark Scheme

(c=8. 8 is not > 10. Returns 8 * 2).

Score:

6 [6 Marks]

Create function get_discount(price).
- If price > 100, apply 10% discount (price * 0.9).
- Else price remains same.
- Return limit.

✅ Mark Scheme

function get_discount(price)
  if price > 100 then
    price = price * 0.9
  endif
  return price
endfunction

Note: Can also use return price inside if/else blocks.

Score:

7 [5 Marks]

(a) Better technique for repeated code?
(b) Two benefits?

✅ Mark Scheme

(a) Use a Sub-program (Function/Procedure).

(b) Code Reusability (write once, use many times), Easier Maintenance/Debugging (fix in one place), Decomposability (break down complex problems).

Score:

8 [1 Mark]

result = calculate_area(5, 10)

Are 5 and 10 Parameters or Arguments?

✅ Mark Scheme

Arguments. (Parameters are the variable names in the definition).

Score: