App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 678 · 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.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) sorting the scores (d) typing your age
2. 2.True or false: tapping a button is an input. (a) True (b) False
3. 3.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) input (c) output
4. 4.🔍 Which is the odd one out? (a) a buzz (vibration) (b) checking a password (c) sorting the scores (d) working out a tip
5. 5.Which of these is an output? (a) a pop-up message (b) taking a photo (c) typing your age (d) tapping a button
6. 6.True or false: working out a tip is processing. (a) False (b) True
7. 7.Which of these is an input? (a) working out a tip (b) adding up a bill (c) a result on screen (d) speaking a command
8. 8.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 40; // 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 3 (b) line 4 (c) line 1 (d) line 2
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 50; // 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 2 (c) line 4 (d) line 1
10. 10.⚙️ What number does this app show?
    let bill = 288; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
11. 11.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) input (c) output
12. 12.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 2 (b) line 1 (c) line 3 (d) line 4
14. 14.⚙️ 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);
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 5; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
17. 17.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
18. 18.🔍 Which is the odd one out? (a) working out a tip (b) a pop-up message (c) adding up a bill (d) checking a password
19. 19.Which of these is processing? (a) typing your age (b) a buzz (vibration) (c) a pop-up message (d) checking a password
20. 20.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) typing your age (d) adding up a bill
21. 21.Which of these is an input? (a) a pop-up message (b) a buzz (vibration) (c) sorting the scores (d) tapping a button
22. 22.True or false: taking a photo is an input. (a) False (b) True
23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 144; // 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 2 (b) line 4 (c) line 3 (d) line 1
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 120; // 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 2 (b) line 1 (c) line 3 (d) line 4
25. 25.🔍 Which is the odd one out? (a) sorting the scores (b) working out a tip (c) a result on screen (d) checking a password
26. 26.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
27. 27.⚙️ What number does this app show?
    let bill = 105; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
28. 28.🔍 Which is the odd one out? (a) a result on screen (b) speaking a command (c) a buzz (vibration) (d) a pop-up message
29. 29.True or false: speaking a command is processing. (a) True (b) False
30. 30.⚙️ What number does this app show?
    let price = 210; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
31. 31.⚙️ What number does this app show?
    let price = 600; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
32. 32.🔍 Which is the odd one out? (a) a beep sound (b) tapping a button (c) a pop-up message (d) a result on screen
33. 33.True or false: adding up a bill is processing. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) a buzz (vibration) (b) checking a password (c) a beep sound (d) a result on screen
35. 35.Which of these is an output? (a) a result on screen (b) tapping a button (c) taking a photo (d) speaking a command
36. 36.Which of these is an input? (a) sorting the scores (b) typing your age (c) checking a password (d) a pop-up message
37. 37.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 520; // 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 1 (b) line 2 (c) line 3 (d) line 4
39. 39.⚙️ What number does this app show?
    let price = 60; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
40. 40.True or false: typing your age is an output. (a) True (b) False

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