App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 593 · 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) processing (b) output (c) input
2. 2.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
3. 3.Which of these is an output? (a) sorting the scores (b) a result on screen (c) speaking a command (d) tapping a button
4. 4.True or false: adding up a bill is processing. (a) False (b) True
5. 5.⚙️ What number does this app show?
   let km = 9; // typed by the user
   let metres = km * 1000;
   show(metres);
6. 6.⚙️ What number does this app show?
   let km = 2; // typed by the user
   let metres = km * 1000;
   show(metres);
7. 7.Which of these is an input? (a) working out a tip (b) sorting the scores (c) adding up a bill (d) tapping a button
8. 8.🔍 Which is the odd one out? (a) checking a password (b) typing your age (c) adding up a bill (d) sorting the scores
9. 9.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
10. 10.Which of these is processing? (a) a buzz (vibration) (b) speaking a command (c) taking a photo (d) checking a password
11. 11.True or false: typing your age is an input. (a) False (b) True
12. 12.Which of these is an output? (a) a pop-up message (b) typing your age (c) speaking a command (d) adding up a bill
13. 13.🔍 Which is the odd one out? (a) checking a password (b) working out a tip (c) sorting the scores (d) taking a photo
14. 14.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) speaking a command (d) a result on screen
15. 15.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a buzz (vibration) (d) checking a password
16. 16.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
17. 17.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) checking a password (d) speaking a command
18. 18.Which of these is an output? (a) checking a password (b) a buzz (vibration) (c) sorting the scores (d) typing your age
19. 19.Which of these is an input? (a) taking a photo (b) a beep sound (c) checking a password (d) working out a tip
20. 20.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) input (c) output
21. 21.True or false: a result on screen is an output. (a) False (b) True
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 285; // 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 4 (d) line 3
23. 23.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input
24. 24.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
25. 25.Which of these is an input? (a) sorting the scores (b) a result on screen (c) typing your age (d) a beep sound
26. 26.True or false: sorting the scores is an input. (a) True (b) False
27. 27.⚙️ What number does this app show?
    let price = 540; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
28. 28.⚙️ What number does this app show?
    let price = 160; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
29. 29.Which of these is processing? (a) working out a tip (b) typing your age (c) taking a photo (d) a result on screen
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 213; // 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 3 (b) line 4 (c) line 2 (d) line 1
31. 31.⚙️ 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
32. 32.🔍 Which is the odd one out? (a) adding up a bill (b) checking a password (c) tapping a button (d) working out a tip
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 3 (b) line 2 (c) line 4 (d) line 1
34. 34.True or false: a pop-up message is processing. (a) True (b) False
35. 35.Which of these is an input? (a) sorting the scores (b) speaking a command (c) checking a password (d) adding up a bill
36. 36.Which of these is processing? (a) taking a photo (b) tapping a button (c) adding up a bill (d) typing your age
37. 37.⚙️ 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 2 (b) line 1 (c) line 3
38. 38.⚙️ What number does this app show?
    let price = 470; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
39. 39.True or false: a buzz (vibration) is an output. (a) False (b) True
40. 40.⚙️ What number does this app show?
    let bill = 66; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);

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