App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 736 · 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 working out a tip an input, processing or an output? (a) output (b) processing (c) input
2. 2.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
3. 3.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a pop-up message (d) tapping a button
4. 4.⚙️ 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 1 (b) line 3 (c) line 2
5. 5.Which of these is processing? (a) a buzz (vibration) (b) adding up a bill (c) typing your age (d) a pop-up message
6. 6.⚙️ What number does this app show?
   let price = 350; // typed by the user
   let off = 30; // typed by the user
   let pay = price - off;
   show(pay);
7. 7.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
8. 8.True or false: sorting the scores is processing. (a) True (b) False
9. 9.True or false: a beep sound is processing. (a) True (b) False
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 75; // 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 3 (c) line 1 (d) line 4
11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 125; // 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 1 (b) line 3 (c) line 2 (d) line 4
12. 12.🔍 Which is the odd one out? (a) adding up a bill (b) a buzz (vibration) (c) a beep sound (d) a result on screen
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 240; // 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 3 (b) line 2 (c) line 1 (d) line 4
14. 14.⚙️ What number does this app show?
    let km = 11; // typed by the user
    let metres = km * 1000;
    show(metres);
15. 15.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
16. 16.True or false: a pop-up message is an output. (a) False (b) True
17. 17.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) output (c) processing
18. 18.Which of these is processing? (a) a buzz (vibration) (b) taking a photo (c) a pop-up message (d) checking a password
19. 19.🔍 Which is the odd one out? (a) a beep sound (b) working out a tip (c) a buzz (vibration) (d) a result on screen
20. 20.⚙️ 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 1 (b) line 3 (c) line 2
21. 21.⚙️ What number does this app show?
    let bill = 240; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
22. 22.Which of these is an output? (a) a buzz (vibration) (b) sorting the scores (c) adding up a bill (d) tapping a button
23. 23.🔍 Which is the odd one out? (a) taking a photo (b) working out a tip (c) adding up a bill (d) checking a password
24. 24.🔍 Which is the odd one out? (a) adding up a bill (b) a pop-up message (c) working out a tip (d) sorting the scores
25. 25.🔍 Which is the odd one out? (a) a result on screen (b) speaking a command (c) typing your age (d) tapping a button
26. 26.True or false: a buzz (vibration) is processing. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) sorting the scores (d) a buzz (vibration)
28. 28.True or false: a beep sound is an input. (a) False (b) True
29. 29.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) output (c) input
30. 30.Which of these is an output? (a) adding up a bill (b) tapping a button (c) a result on screen (d) checking a password
31. 31.⚙️ What number does this app show?
    let bill = 54; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
32. 32.Which of these is an input? (a) a pop-up message (b) working out a tip (c) taking a photo (d) a beep sound
33. 33.Which of these is an output? (a) speaking a command (b) working out a tip (c) a beep sound (d) checking a password
34. 34.Which of these is an input? (a) adding up a bill (b) a buzz (vibration) (c) checking a password (d) speaking a command
35. 35.True or false: a beep sound is an output. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) working out a tip (d) speaking a command
37. 37.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
38. 38.True or false: tapping a button is an input. (a) True (b) False
39. 39.Which of these is processing? (a) a beep sound (b) tapping a button (c) sorting the scores (d) speaking a command
40. 40.⚙️ What number does this app show?
    let bill = 114; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);

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