App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 734 · 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 is the odd one out? (a) working out a tip (b) speaking a command (c) adding up a bill (d) sorting the scores
2. 2.⚙️ What number does this app show?
   let km = 4; // typed by the user
   let metres = km * 1000;
   show(metres);
3. 3.🔍 Which is the odd one out? (a) a result on screen (b) sorting the scores (c) a buzz (vibration) (d) a beep sound
4. 4.⚙️ What number does this app show?
   let price = 130; // typed by the user
   let off = 50; // typed by the user
   let pay = price - off;
   show(pay);
5. 5.⚙️ What number does this app show?
   let bill = 80; // typed by the user
   let friends = 5; // typed by the user
   let share = bill / friends;
   show(share);
6. 6.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) tapping a button (d) a beep sound
7. 7.⚙️ What number does this app show?
   let bill = 190; // typed by the user
   let friends = 5; // typed by the user
   let share = bill / friends;
   show(share);
8. 8.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) input (c) output
9. 9.Which of these is an output? (a) a beep sound (b) sorting the scores (c) taking a photo (d) tapping a button
10. 10.Which of these is an output? (a) a pop-up message (b) adding up a bill (c) speaking a command (d) sorting the scores
11. 11.🔍 Which is the odd one out? (a) a beep sound (b) tapping a button (c) a buzz (vibration) (d) a result on screen
12. 12.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) input (c) processing
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 490; // 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 2 (b) line 1 (c) line 4 (d) line 3
14. 14.⚙️ What number does this app show?
    let price = 420; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
15. 15.Which of these is processing? (a) taking a photo (b) checking a password (c) typing your age (d) a result on screen
16. 16.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) a result on screen (d) speaking a command
17. 17.⚙️ What number does this app show?
    let price = 600; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
18. 18.⚙️ 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 2 (c) line 3
19. 19.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) input (c) processing
20. 20.⚙️ What number does this app show?
    let price = 140; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
21. 21.🔍 Which is the odd one out? (a) checking a password (b) a beep sound (c) a result on screen (d) a buzz (vibration)
22. 22.⚙️ What number does this app show?
    let bill = 90; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
23. 23.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) working out a tip (d) taking a photo
24. 24.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) input (c) processing
25. 25.True or false: checking a password is processing. (a) True (b) False
26. 26.Which of these is an input? (a) a buzz (vibration) (b) checking a password (c) sorting the scores (d) taking a photo
27. 27.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) processing (c) input
28. 28.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) working out a tip (d) a buzz (vibration)
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 212; // 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 1 (b) line 2 (c) line 3 (d) line 4
30. 30.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) output (c) processing
31. 31.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) processing (c) input
32. 32.True or false: a result on screen is an input. (a) True (b) False
33. 33.Which of these is an input? (a) a buzz (vibration) (b) adding up a bill (c) checking a password (d) tapping a button
34. 34.⚙️ What number does this app show?
    let bill = 200; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 2; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
36. 36.⚙️ What number does this app show?
    let bill = 130; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
37. 37.⚙️ What number does this app show?
    let price = 520; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
38. 38.🔍 Which is the odd one out? (a) tapping a button (b) adding up a bill (c) taking a photo (d) speaking a command
39. 39.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
40. 40.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing

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