App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 703 · 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.Which of these is an output? (a) tapping a button (b) a buzz (vibration) (c) taking a photo (d) speaking a command
2. 2.True or false: typing your age is an input. (a) True (b) False
3. 3.Which of these is an input? (a) adding up a bill (b) working out a tip (c) sorting the scores (d) taking a photo
4. 4.⚙️ What number does this app show?
   let km = 6; // typed by the user
   let metres = km * 1000;
   show(metres);
5. 5.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) input (c) output
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 55; // typed by the user
   line 2: let qty = 5; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 2 (b) line 4 (c) line 1 (d) line 3
7. 7.Which of these is an output? (a) working out a tip (b) a beep sound (c) tapping a button (d) typing your age
8. 8.🔍 Which is the odd one out? (a) adding up a bill (b) taking a photo (c) checking a password (d) sorting the scores
9. 9.🔍 Which is the odd one out? (a) taking a photo (b) a buzz (vibration) (c) typing your age (d) speaking a command
10. 10.⚙️ What number does this app show?
    let bill = 170; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
11. 11.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a beep sound (d) working out a tip
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 65; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 3 (c) line 4 (d) line 1
13. 13.⚙️ What number does this app show?
    let bill = 24; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 115; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 4 (c) line 1 (d) line 3
15. 15.⚙️ What number does this app show?
    let bill = 156; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
16. 16.⚙️ In an app, is adding up a bill an input, processing or an output? (a) processing (b) output (c) input
17. 17.True or false: a pop-up message is an input. (a) False (b) True
18. 18.Which of these is an input? (a) a pop-up message (b) typing your age (c) adding up a bill (d) working out a tip
19. 19.⚙️ What number does this app show?
    let price = 10; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
20. 20.⚙️ What number does this app show?
    let price = 310; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
21. 21.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 480; // 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 2 (c) line 3 (d) line 4
23. 23.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) output (c) input
24. 24.True or false: working out a tip is an input. (a) False (b) True
25. 25.⚙️ In an app, is working out a tip an input, processing or an output? (a) output (b) processing (c) input
26. 26.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) output (c) input
27. 27.True or false: typing your age is processing. (a) True (b) False
28. 28.True or false: tapping a button is an output. (a) True (b) False
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 430; // 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 4 (b) line 2 (c) line 1 (d) line 3
30. 30.🔍 Which is the odd one out? (a) adding up a bill (b) a pop-up message (c) checking a password (d) sorting the scores
31. 31.Which of these is processing? (a) tapping a button (b) a beep sound (c) adding up a bill (d) a pop-up message
32. 32.⚙️ What number does this app show?
    let bill = 78; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
33. 33.Which of these is processing? (a) a pop-up message (b) working out a tip (c) a result on screen (d) typing your age
34. 34.True or false: a pop-up message is an output. (a) False (b) True
35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 55; // 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 3 (c) line 4 (d) line 2
36. 36.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
37. 37.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
38. 38.⚙️ What number does this app show?
    let bill = 360; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
39. 39.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
40. 40.🔍 Which is the odd one out? (a) sorting the scores (b) a result on screen (c) working out a tip (d) adding up a bill

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