App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 608 · 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) a pop-up message (b) a result on screen (c) tapping a button (d) a buzz (vibration)
2. 2.🔍 Which is the odd one out? (a) a pop-up message (b) a buzz (vibration) (c) adding up a bill (d) a beep sound
3. 3.⚙️ 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 3 (b) line 1 (c) line 2
4. 4.Which of these is processing? (a) a result on screen (b) taking a photo (c) typing your age (d) adding up a bill
5. 5.🔍 Which is the odd one out? (a) a beep sound (b) speaking a command (c) taking a photo (d) typing your age
6. 6.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
7. 7.🔍 Which is the odd one out? (a) a buzz (vibration) (b) speaking a command (c) a result on screen (d) a pop-up message
8. 8.True or false: taking a photo is an input. (a) True (b) False
9. 9.Which of these is processing? (a) speaking a command (b) working out a tip (c) a result on screen (d) taking a photo
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 430; // 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 3 (c) line 1 (d) line 2
11. 11.True or false: speaking a command is an input. (a) False (b) True
12. 12.Which of these is an input? (a) a beep sound (b) a buzz (vibration) (c) sorting the scores (d) typing your age
13. 13.⚙️ What number does this app show?
    let price = 25; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
14. 14.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) processing (c) input
15. 15.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
16. 16.True or false: checking a password is processing. (a) True (b) False
17. 17.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 7; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 1 (c) line 3
19. 19.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
20. 20.⚙️ 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);
21. 21.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
22. 22.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) taking a photo (d) a buzz (vibration)
23. 23.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) output (c) input
24. 24.🔍 Which is the odd one out? (a) speaking a command (b) typing your age (c) working out a tip (d) tapping a button
25. 25.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) output (c) input
26. 26.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) processing (c) output
27. 27.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 213; // 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 4 (b) line 2 (c) line 1 (d) line 3
28. 28.⚙️ What number does this app show?
    let price = 45; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
29. 29.True or false: adding up a bill is processing. (a) True (b) False
30. 30.Which of these is an output? (a) taking a photo (b) a result on screen (c) typing your age (d) tapping a button
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 177; // 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 4 (b) line 3 (c) line 1 (d) line 2
32. 32.True or false: speaking a command is processing. (a) True (b) False
33. 33.⚙️ What number does this app show?
    let bill = 245; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 2 (b) line 3 (c) line 4 (d) line 1
35. 35.⚙️ What number does this app show?
    let price = 100; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
36. 36.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 280; // 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 3 (c) line 4 (d) line 2
38. 38.⚙️ What number does this app show?
    let price = 420; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
39. 39.True or false: checking a password is an input. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) checking a password (b) sorting the scores (c) working out a tip (d) a result on screen

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