App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 910 · 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.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) output (c) processing
2. 2.⚙️ What number does this app show?
   let bill = 69; // typed by the user
   let friends = 3; // typed by the user
   let share = bill / friends;
   show(share);
3. 3.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) a result on screen (d) typing your age
4. 4.Which of these is an output? (a) taking a photo (b) adding up a bill (c) a buzz (vibration) (d) working out a tip
5. 5.Which of these is an output? (a) typing your age (b) adding up a bill (c) a result on screen (d) sorting the scores
6. 6.🔍 Which is the odd one out? (a) tapping a button (b) working out a tip (c) checking a password (d) adding up a bill
7. 7.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
8. 8.⚙️ What number does this app show?
   let km = 3; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.True or false: typing your age is an input. (a) True (b) False
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 4; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 3 (c) line 1
11. 11.⚙️ 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 2 (b) line 3 (c) line 1
12. 12.⚙️ 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 2 (b) line 3 (c) line 1
13. 13.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
14. 14.True or false: a buzz (vibration) is an input. (a) False (b) True
15. 15.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) processing (c) output
16. 16.True or false: working out a tip is processing. (a) True (b) False
17. 17.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) output (c) input
18. 18.Which of these is an input? (a) sorting the scores (b) taking a photo (c) checking a password (d) a buzz (vibration)
19. 19.⚙️ What number does this app show?
    let price = 530; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
20. 20.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) a buzz (vibration) (d) checking a password
21. 21.True or false: adding up a bill is an input. (a) True (b) False
22. 22.True or false: a result on screen is an input. (a) True (b) False
23. 23.⚙️ What number does this app show?
    let bill = 44; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
24. 24.Which of these is an input? (a) a buzz (vibration) (b) sorting the scores (c) a result on screen (d) tapping a button
25. 25.🔍 Which is the odd one out? (a) sorting the scores (b) speaking a command (c) typing your age (d) taking a photo
26. 26.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
27. 27.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) input (c) processing
28. 28.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 54; // 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 4 (b) line 2 (c) line 3 (d) line 1
30. 30.True or false: sorting the scores is processing. (a) True (b) False
31. 31.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
32. 32.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 125; // 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 1 (b) line 2 (c) line 3 (d) line 4
34. 34.⚙️ What number does this app show?
    let price = 500; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
35. 35.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
36. 36.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
37. 37.True or false: a beep sound is an input. (a) True (b) False
38. 38.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
39. 39.⚙️ What number does this app show?
    let bill = 75; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
40. 40.⚙️ What number does this app show?
    let bill = 120; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);

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