App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 370 · 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) typing your age (b) speaking a command (c) a pop-up message (d) taking a photo
2. 2.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) output (c) input
3. 3.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) output (c) processing
4. 4.Which of these is an input? (a) taking a photo (b) a pop-up message (c) sorting the scores (d) checking a password
5. 5.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) output (c) input
6. 6.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) working out a tip (d) typing your age
7. 7.Which of these is an output? (a) tapping a button (b) adding up a bill (c) a beep sound (d) taking a photo
8. 8.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 15; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
9. 9.True or false: sorting the scores is processing. (a) True (b) False
10. 10.⚙️ 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);
11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 140; // 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 3 (b) line 4 (c) line 1 (d) line 2
12. 12.🔍 Which is the odd one out? (a) a pop-up message (b) speaking a command (c) a buzz (vibration) (d) a beep sound
13. 13.Which of these is processing? (a) a result on screen (b) sorting the scores (c) typing your age (d) tapping a button
14. 14.⚙️ What number does this app show?
    let bill = 98; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
15. 15.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
16. 16.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) processing (c) output
17. 17.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
18. 18.True or false: adding up a bill is processing. (a) False (b) True
19. 19.True or false: speaking a command is an input. (a) True (b) False
20. 20.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) processing (c) output
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 13; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
22. 22.⚙️ What number does this app show?
    let price = 95; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
23. 23.True or false: sorting the scores is an input. (a) True (b) False
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 170; // 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 4 (b) line 3 (c) line 1 (d) line 2
25. 25.⚙️ What number does this app show?
    let price = 160; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 224; // 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 1 (b) line 3 (c) line 2 (d) line 4
27. 27.Which of these is an output? (a) a buzz (vibration) (b) typing your age (c) speaking a command (d) sorting the scores
28. 28.True or false: typing your age is processing. (a) True (b) False
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 111; // typed by the user
    line 2: let friends = 3; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 2 (b) line 4 (c) line 1 (d) line 3
30. 30.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a result on screen (c) a beep sound (d) sorting the scores
31. 31.True or false: a result on screen is processing. (a) True (b) False
32. 32.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
33. 33.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) tapping a button (d) adding up a bill
34. 34.Which of these is processing? (a) a beep sound (b) a result on screen (c) working out a tip (d) speaking a command
35. 35.🔍 Which is the odd one out? (a) typing your age (b) taking a photo (c) a result on screen (d) speaking a command
36. 36.🔍 Which is the odd one out? (a) typing your age (b) adding up a bill (c) working out a tip (d) sorting the scores
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 490; // 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 4 (b) line 2 (c) line 3 (d) line 1
38. 38.True or false: working out a tip is an input. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) speaking a command (b) checking a password (c) tapping a button (d) taking a photo
40. 40.⚙️ What number does this app show?
    let price = 170; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);

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