App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 586 · 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 speaking a command an input, processing or an output? (a) processing (b) output (c) input
2. 2.True or false: a pop-up message is processing. (a) True (b) False
3. 3.True or false: sorting the scores is an output. (a) False (b) True
4. 4.⚙️ What number does this app show?
   let price = 95; // typed by the user
   let qty = 6; // typed by the user
   let total = price * qty;
   show(total);
5. 5.🔍 Which is the odd one out? (a) speaking a command (b) a beep sound (c) a buzz (vibration) (d) a result on screen
6. 6.🔍 Which is the odd one out? (a) speaking a command (b) a result on screen (c) tapping a button (d) typing your age
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 20; // 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 2 (c) line 4 (d) line 1
8. 8.Which of these is processing? (a) adding up a bill (b) a buzz (vibration) (c) taking a photo (d) a beep sound
9. 9.⚙️ What number does this app show?
   let km = 2; // typed by the user
   let metres = km * 1000;
   show(metres);
10. 10.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) working out a tip (d) adding up a bill
11. 11.⚙️ What number does this app show?
    let price = 70; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
12. 12.Which of these is an input? (a) a beep sound (b) a pop-up message (c) a buzz (vibration) (d) tapping a button
13. 13.⚙️ What number does this app show?
    let price = 75; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
14. 14.Which of these is processing? (a) a beep sound (b) a buzz (vibration) (c) working out a tip (d) speaking a command
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 9; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
16. 16.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
17. 17.True or false: sorting the scores is processing. (a) False (b) True
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 260; // 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 2 (c) line 4 (d) line 3
19. 19.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) input (c) processing
20. 20.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) a pop-up message (d) taking a photo
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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 3 (b) line 1 (c) line 2 (d) line 4
22. 22.⚙️ What number does this app show?
    let bill = 155; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
23. 23.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) output (c) input
24. 24.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
25. 25.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) working out a tip (d) tapping a button
26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 390; // 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 2 (b) line 1 (c) line 3 (d) line 4
27. 27.⚙️ In an app, is adding up a bill an input, processing or an output? (a) processing (b) output (c) input
28. 28.⚙️ 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);
29. 29.True or false: speaking a command is an input. (a) False (b) True
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 250; // 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 4 (c) line 2 (d) line 3
31. 31.True or false: sorting the scores is an input. (a) False (b) True
32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 370; // 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
33. 33.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
34. 34.True or false: adding up a bill is processing. (a) True (b) False
35. 35.True or false: a beep sound is processing. (a) True (b) False
36. 36.Which of these is an input? (a) adding up a bill (b) typing your age (c) a beep sound (d) sorting the scores
37. 37.Which of these is an input? (a) a pop-up message (b) speaking a command (c) adding up a bill (d) working out a tip
38. 38.Which of these is an output? (a) adding up a bill (b) typing your age (c) speaking a command (d) a result on screen
39. 39.True or false: speaking a command is an output. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) adding up a bill (b) taking a photo (c) typing your age (d) speaking a command

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