App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 922 · 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.True or false: a beep sound is processing. (a) True (b) False
2. 2.⚙️ In an app, is tapping a button an input, processing or an output? (a) output (b) processing (c) input
3. 3.True or false: typing your age is processing. (a) True (b) False
4. 4.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 190; // typed by the user
   line 2: let off = 20; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 3 (b) line 4 (c) line 1 (d) line 2
5. 5.🔍 Which is the odd one out? (a) typing your age (b) checking a password (c) tapping a button (d) taking a photo
6. 6.Which of these is processing? (a) typing your age (b) a beep sound (c) checking a password (d) tapping a button
7. 7.True or false: working out a tip is an input. (a) True (b) False
8. 8.Which of these is processing? (a) a result on screen (b) speaking a command (c) typing your age (d) adding up a bill
9. 9.🔍 Which is the odd one out? (a) tapping a button (b) sorting the scores (c) checking a password (d) adding up a bill
10. 10.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) a result on screen (d) adding up a bill
11. 11.True or false: typing your age is an output. (a) True (b) False
12. 12.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
13. 13.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) a beep sound (d) typing your age
14. 14.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) a pop-up message (d) adding up a bill
15. 15.⚙️ What number does this app show?
    let price = 300; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
16. 16.Which of these is processing? (a) a buzz (vibration) (b) speaking a command (c) taking a photo (d) sorting the scores
17. 17.Which of these is an output? (a) typing your age (b) a buzz (vibration) (c) taking a photo (d) tapping a button
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 93; // 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 1 (c) line 2 (d) line 4
19. 19.🔍 Which is the odd one out? (a) working out a tip (b) typing your age (c) sorting the scores (d) checking a password
20. 20.⚙️ 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
21. 21.⚙️ What number does this app show?
    let bill = 98; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
22. 22.True or false: a pop-up message is an output. (a) False (b) True
23. 23.True or false: adding up a bill is an output. (a) False (b) True
24. 24.Which of these is processing? (a) a result on screen (b) working out a tip (c) tapping a button (d) taking a photo
25. 25.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) input (c) processing
26. 26.⚙️ What number does this app show?
    let bill = 395; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
27. 27.True or false: taking a photo is processing. (a) False (b) True
28. 28.Which of these is an input? (a) a result on screen (b) checking a password (c) a beep sound (d) tapping a button
29. 29.True or false: checking a password is an input. (a) False (b) True
30. 30.True or false: sorting the scores is processing. (a) False (b) True
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 460; // 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 3 (b) line 2 (c) line 4 (d) line 1
32. 32.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
33. 33.Which of these is an output? (a) a beep sound (b) typing your age (c) checking a password (d) working out a tip
34. 34.⚙️ What number does this app show?
    let bill = 128; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
35. 35.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
36. 36.🔍 Which is the odd one out? (a) a result on screen (b) taking a photo (c) a pop-up message (d) a buzz (vibration)
37. 37.🔍 Which is the odd one out? (a) a buzz (vibration) (b) typing your age (c) tapping a button (d) speaking a command
38. 38.⚙️ What number does this app show?
    let bill = 110; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 530; // 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 4 (b) line 1 (c) line 3 (d) line 2

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