App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 89 · 40 questions

Developer's tip (In, work, out): Input → processing → output. Input: typing, tapping, a photo, your voice. Output: a result on screen, a sound, a buzz, a pop-up. In code, the processing line works out a new value from the inputs; show() is the output.

1. 1.True or false: adding up a bill is an input. (a) False (b) True
2. 2.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 10; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
3. 3.True or false: sorting the scores is processing. (a) True (b) False
4. 4.Which of these is an output? (a) tapping a button (b) taking a photo (c) typing your age (d) a buzz (vibration)
5. 5.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) working out a tip (d) a buzz (vibration)
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 9; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 130; // typed by the user
   line 2: let off = 10; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 1 (b) line 4 (c) line 2 (d) line 3
8. 8.⚙️ What number does this app show?
   let km = 13; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.🔍 Which is the odd one out? (a) a result on screen (b) checking a password (c) a buzz (vibration) (d) a pop-up message
10. 10.True or false: a pop-up message is an input. (a) True (b) False
11. 11.Which of these is an output? (a) tapping a button (b) sorting the scores (c) a result on screen (d) typing your age
12. 12.True or false: checking a password is an input. (a) True (b) False
13. 13.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
14. 14.⚙️ What number does this app show?
    let price = 210; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
15. 15.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) output (c) processing
16. 16.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing
17. 17.True or false: adding up a bill is an output. (a) True (b) False
18. 18.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
19. 19.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) a result on screen (d) sorting the scores
20. 20.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
21. 21.⚙️ What number does this app show?
    let bill = 78; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
22. 22.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) input (c) processing
23. 23.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) output (c) processing
24. 24.🔍 Which is the odd one out? (a) tapping a button (b) a result on screen (c) a pop-up message (d) a buzz (vibration)
25. 25.🔍 Which is the odd one out? (a) typing your age (b) taking a photo (c) tapping a button (d) a pop-up message
26. 26.True or false: working out a tip is an input. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) sorting the scores (b) a result on screen (c) checking a password (d) working out a tip
28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
29. 29.🔍 Which is the odd one out? (a) sorting the scores (b) taking a photo (c) checking a password (d) adding up a bill
30. 30.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) processing (c) output
31. 31.True or false: checking a password is an output. (a) True (b) False
32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 188; // typed by the user
    line 2: let friends = 4; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 4 (b) line 1 (c) line 3 (d) line 2
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // typed by the user
    line 2: let qty = 3; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 2 (b) line 3 (c) line 1 (d) line 4
35. 35.Which of these is processing? (a) a beep sound (b) checking a password (c) speaking a command (d) taking a photo
36. 36.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) a beep sound (d) sorting the scores
37. 37.Which of these is an input? (a) sorting the scores (b) typing your age (c) checking a password (d) a pop-up message
38. 38.Which of these is an output? (a) sorting the scores (b) taking a photo (c) a pop-up message (d) typing your age
39. 39.True or false: typing your age is processing. (a) False (b) True
40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 15; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2

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