App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 671 · 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) a buzz (vibration) (b) a pop-up message (c) a result on screen (d) taking a photo
2. 2.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) output (c) processing
3. 3.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) tapping a button (d) adding up a bill
4. 4.Which of these is an input? (a) tapping a button (b) adding up a bill (c) checking a password (d) sorting the scores
5. 5.⚙️ What number does this app show?
   let price = 100; // typed by the user
   let qty = 3; // typed by the user
   let total = price * qty;
   show(total);
6. 6.True or false: adding up a bill is an input. (a) True (b) False
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 5; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 2 (b) line 3 (c) line 1
8. 8.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 600; // typed by the user
   line 2: let off = 30; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 1 (b) line 2 (c) line 4 (d) line 3
9. 9.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
10. 10.Which of these is an output? (a) adding up a bill (b) a result on screen (c) typing your age (d) checking a password
11. 11.True or false: taking a photo is an output. (a) True (b) False
12. 12.True or false: working out a tip is an input. (a) False (b) True
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 12; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
14. 14.Which of these is processing? (a) speaking a command (b) taking a photo (c) tapping a button (d) adding up a bill
15. 15.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
16. 16.⚙️ What number does this app show?
    let bill = 84; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
17. 17.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
18. 18.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) output (c) processing
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 154; // 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 1 (b) line 4 (c) line 3 (d) line 2
20. 20.🔍 Which is the odd one out? (a) a pop-up message (b) a beep sound (c) typing your age (d) a buzz (vibration)
21. 21.⚙️ What number does this app show?
    let price = 75; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
22. 22.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) output (c) input
23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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 2 (b) line 1 (c) line 3 (d) line 4
24. 24.True or false: a pop-up message is an output. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) adding up a bill (b) a buzz (vibration) (c) checking a password (d) working out a tip
26. 26.⚙️ 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 2 (c) line 1
27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // typed by the user
    line 2: let qty = 3; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 3 (b) line 4 (c) line 2 (d) line 1
28. 28.⚙️ What number does this app show?
    let bill = 50; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
29. 29.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
30. 30.Which of these is processing? (a) typing your age (b) working out a tip (c) a pop-up message (d) taking a photo
31. 31.Which of these is an output? (a) tapping a button (b) speaking a command (c) a pop-up message (d) adding up a bill
32. 32.🔍 Which is the odd one out? (a) a buzz (vibration) (b) speaking a command (c) a pop-up message (d) a result on screen
33. 33.⚙️ What number does this app show?
    let bill = 272; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
34. 34.True or false: sorting the scores is an output. (a) True (b) False
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 2 (c) line 1
36. 36.True or false: a beep sound is processing. (a) False (b) True
37. 37.⚙️ What number does this app show?
    let price = 410; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
38. 38.Which of these is an input? (a) speaking a command (b) a beep sound (c) checking a password (d) a buzz (vibration)
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 106; // 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 2 (b) line 1 (c) line 3 (d) line 4
40. 40.🔍 Which is the odd one out? (a) a pop-up message (b) working out a tip (c) a beep sound (d) a buzz (vibration)

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