App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 404 · 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: working out a tip is an input. (a) True (b) False
2. 2.Which of these is processing? (a) typing your age (b) a beep sound (c) a buzz (vibration) (d) adding up a bill
3. 3.True or false: a pop-up message is an input. (a) False (b) True
4. 4.Which of these is processing? (a) checking a password (b) tapping a button (c) speaking a command (d) a beep sound
5. 5.True or false: a beep sound is an input. (a) True (b) False
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 8; // 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 = 420; // typed by the user
   line 2: let off = 20; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 3 (b) line 1 (c) line 2 (d) line 4
8. 8.⚙️ What number does this app show?
   let km = 6; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
10. 10.⚙️ What number does this app show?
    let bill = 268; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
11. 11.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) taking a photo (d) a beep sound
12. 12.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
13. 13.Which of these is an input? (a) typing your age (b) a beep sound (c) a pop-up message (d) working out a tip
14. 14.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // typed by the user
    line 2: let qty = 2; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 1 (b) line 4 (c) line 3 (d) line 2
16. 16.Which of these is an output? (a) typing your age (b) a buzz (vibration) (c) taking a photo (d) adding up a bill
17. 17.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 216; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 4 (c) line 3 (d) line 1
19. 19.True or false: adding up a bill is an input. (a) False (b) True
20. 20.True or false: sorting the scores is processing. (a) False (b) True
21. 21.True or false: working out a tip is an output. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a pop-up message (b) a result on screen (c) a beep sound (d) typing your age
23. 23.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) input (c) processing
24. 24.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
25. 25.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) output (c) processing
26. 26.Which of these is an output? (a) a beep sound (b) typing your age (c) speaking a command (d) taking a photo
27. 27.🔍 Which is the odd one out? (a) tapping a button (b) a pop-up message (c) typing your age (d) speaking a command
28. 28.True or false: taking a photo is an output. (a) False (b) True
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 36; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 1 (c) line 4 (d) line 3
30. 30.True or false: sorting the scores is an output. (a) True (b) False
31. 31.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
32. 32.⚙️ What number does this app show?
    let bill = 228; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
33. 33.True or false: checking a password is an input. (a) True (b) False
34. 34.Which of these is processing? (a) a buzz (vibration) (b) a beep sound (c) working out a tip (d) typing your age
35. 35.⚙️ What number does this app show?
    let price = 540; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
36. 36.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 510; // typed by the user
    line 2: let off = 50; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 3 (b) line 1 (c) line 2 (d) line 4
38. 38.Which of these is an input? (a) a result on screen (b) taking a photo (c) adding up a bill (d) sorting the scores
39. 39.⚙️ What number does this app show?
    let price = 600; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
40. 40.Which of these is an input? (a) a beep sound (b) a buzz (vibration) (c) a pop-up message (d) tapping a button

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