App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 618 · 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 a beep sound an input, processing or an output? (a) output (b) processing (c) input
2. 2.🔍 Which is the odd one out? (a) taking a photo (b) working out a tip (c) tapping a button (d) typing your age
3. 3.Which of these is an input? (a) a buzz (vibration) (b) a beep sound (c) tapping a button (d) working out a tip
4. 4.True or false: a result on screen is an output. (a) True (b) False
5. 5.⚙️ What number does this app show?
   let bill = 237; // typed by the user
   let friends = 3; // typed by the user
   let share = bill / friends;
   show(share);
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 390; // 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 1 (b) line 4 (c) line 3 (d) line 2
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 75; // typed by the user
   line 2: let qty = 5; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 2 (b) line 1 (c) line 4 (d) line 3
8. 8.True or false: a buzz (vibration) is an input. (a) True (b) False
9. 9.True or false: adding up a bill is processing. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) a buzz (vibration) (d) working out a tip
11. 11.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) processing (c) input
12. 12.🔍 Which is the odd one out? (a) speaking a command (b) a beep sound (c) a pop-up message (d) a result on screen
13. 13.🔍 Which is the odd one out? (a) typing your age (b) taking a photo (c) adding up a bill (d) tapping a button
14. 14.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
15. 15.⚙️ What number does this app show?
    let price = 260; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
16. 16.True or false: taking a photo is an output. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) taking a photo (b) tapping a button (c) checking a password (d) speaking a command
18. 18.Which of these is an input? (a) a result on screen (b) speaking a command (c) checking a password (d) sorting the scores
19. 19.🔍 Which is the odd one out? (a) adding up a bill (b) working out a tip (c) checking a password (d) typing your age
20. 20.⚙️ What number does this app show?
    let price = 270; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
21. 21.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
22. 22.Which of these is processing? (a) speaking a command (b) tapping a button (c) typing your age (d) adding up a bill
23. 23.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
24. 24.True or false: typing your age is an input. (a) False (b) True
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 430; // typed by the user
    line 2: let off = 40; // 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
26. 26.Which of these is an input? (a) taking a photo (b) a pop-up message (c) adding up a bill (d) a buzz (vibration)
27. 27.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
28. 28.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
29. 29.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) checking a password (d) a pop-up message
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // typed by the user
    line 2: let qty = 4; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 4 (b) line 2 (c) line 3 (d) line 1
31. 31.🔍 Which is the odd one out? (a) sorting the scores (b) a result on screen (c) a buzz (vibration) (d) a pop-up message
32. 32.True or false: a result on screen is an input. (a) True (b) False
33. 33.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 304; // 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 3 (c) line 2 (d) line 1
35. 35.Which of these is an output? (a) taking a photo (b) adding up a bill (c) a beep sound (d) speaking a command
36. 36.⚙️ What number does this app show?
    let bill = 295; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 360; // 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 4 (b) line 1 (c) line 3 (d) line 2
38. 38.True or false: tapping a button is an input. (a) True (b) False
39. 39.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
40. 40.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);

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