App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 425 · 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 tapping a button an input, processing or an output? (a) output (b) processing (c) input
2. 2.🔍 Which is the odd one out? (a) a buzz (vibration) (b) typing your age (c) taking a photo (d) tapping a button
3. 3.Which of these is processing? (a) a pop-up message (b) a buzz (vibration) (c) checking a password (d) tapping a button
4. 4.⚙️ What number does this app show?
   let bill = 46; // typed by the user
   let friends = 2; // typed by the user
   let share = bill / friends;
   show(share);
5. 5.Which of these is an input? (a) a pop-up message (b) speaking a command (c) sorting the scores (d) a buzz (vibration)
6. 6.🔍 Which is the odd one out? (a) a result on screen (b) taking a photo (c) typing your age (d) speaking a command
7. 7.Which of these is an input? (a) a beep sound (b) a buzz (vibration) (c) typing your age (d) sorting the scores
8. 8.⚙️ What number does this app show?
   let price = 90; // typed by the user
   let qty = 5; // typed by the user
   let total = price * qty;
   show(total);
9. 9.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) processing (c) input
10. 10.True or false: sorting the scores is processing. (a) True (b) False
11. 11.Which of these is an input? (a) tapping a button (b) working out a tip (c) a beep sound (d) checking a password
12. 12.🔍 Which is the odd one out? (a) a pop-up message (b) tapping a button (c) speaking a command (d) taking a photo
13. 13.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) output (c) processing
14. 14.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) processing (c) output
15. 15.⚙️ What number does this app show?
    let bill = 360; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 4 (b) line 3 (c) line 1 (d) line 2
17. 17.🔍 Which is the odd one out? (a) checking a password (b) a beep sound (c) a pop-up message (d) a buzz (vibration)
18. 18.⚙️ What number does this app show?
    let bill = 141; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
19. 19.🔍 Which is the odd one out? (a) speaking a command (b) sorting the scores (c) adding up a bill (d) working out a tip
20. 20.⚙️ What number does this app show?
    let bill = 185; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
21. 21.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) output (c) processing
22. 22.Which of these is processing? (a) a beep sound (b) adding up a bill (c) tapping a button (d) a result on screen
23. 23.True or false: checking a password is an output. (a) True (b) False
24. 24.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 600; // 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 1 (c) line 2 (d) line 4
26. 26.Which of these is an output? (a) sorting the scores (b) checking a password (c) a result on screen (d) typing your age
27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 4 (b) line 1 (c) line 3 (d) line 2
28. 28.🔍 Which is the odd one out? (a) typing your age (b) a result on screen (c) a pop-up message (d) a beep sound
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 3 (b) line 2 (c) line 4 (d) line 1
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 130; // 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 1 (c) line 2 (d) line 4
31. 31.⚙️ 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 1 (b) line 2 (c) line 3 (d) line 4
32. 32.Which of these is processing? (a) working out a tip (b) a buzz (vibration) (c) speaking a command (d) typing your age
33. 33.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
34. 34.Which of these is an output? (a) typing your age (b) checking a password (c) adding up a bill (d) a pop-up message
35. 35.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
36. 36.Which of these is an input? (a) sorting the scores (b) a pop-up message (c) a buzz (vibration) (d) taking a photo
37. 37.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 345; // typed by the user
    line 2: let friends = 5; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 4 (b) line 2 (c) line 1 (d) line 3
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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 1 (b) line 2 (c) line 3 (d) line 4
40. 40.Which of these is processing? (a) speaking a command (b) sorting the scores (c) typing your age (d) a result on screen

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