App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 902 · 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 typing your age an input, processing or an output? (a) processing (b) output (c) input
2. 2.🔍 Which is the odd one out? (a) typing your age (b) a beep sound (c) a buzz (vibration) (d) a pop-up message
3. 3.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
4. 4.Which of these is processing? (a) adding up a bill (b) typing your age (c) a result on screen (d) taking a photo
5. 5.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
6. 6.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
7. 7.🔍 Which is the odd one out? (a) typing your age (b) taking a photo (c) a buzz (vibration) (d) speaking a command
8. 8.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) adding up a bill (d) a beep sound
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 14; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
10. 10.🔍 Which is the odd one out? (a) speaking a command (b) working out a tip (c) tapping a button (d) typing your age
11. 11.⚙️ What number does this app show?
    let price = 210; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
12. 12.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a buzz (vibration) (d) taking a photo
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 40; // 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
14. 14.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) processing (c) output
15. 15.⚙️ What number does this app show?
    let price = 150; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
16. 16.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
17. 17.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) input (c) output
18. 18.Which of these is an input? (a) a pop-up message (b) speaking a command (c) working out a tip (d) sorting the scores
19. 19.⚙️ 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 1 (b) line 2 (c) line 3
20. 20.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
21. 21.⚙️ What number does this app show?
    let bill = 195; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
22. 22.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
23. 23.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
24. 24.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) input (c) processing
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 470; // 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 3 (b) line 2 (c) line 4 (d) line 1
26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 45; // 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 4 (b) line 3 (c) line 2 (d) line 1
27. 27.⚙️ 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 1 (b) line 3 (c) line 2
28. 28.True or false: speaking a command is an input. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) speaking a command (d) a pop-up message
30. 30.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
31. 31.True or false: tapping a button is an input. (a) False (b) True
32. 32.True or false: a pop-up message is processing. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a beep sound (d) tapping a button
34. 34.Which of these is processing? (a) a pop-up message (b) checking a password (c) a beep sound (d) tapping a button
35. 35.True or false: taking a photo is an input. (a) False (b) True
36. 36.True or false: adding up a bill is an input. (a) False (b) True
37. 37.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
38. 38.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
39. 39.⚙️ What number does this app show?
    let price = 300; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
40. 40.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);

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