App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 732 · 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.True or false: sorting the scores is an input. (a) False (b) True
2. 2.True or false: a beep sound is an output. (a) True (b) False
3. 3.True or false: taking a photo is an input. (a) False (b) True
4. 4.Which of these is an input? (a) checking a password (b) a buzz (vibration) (c) a beep sound (d) speaking a command
5. 5.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 75; // 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
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 75; // typed by the user
   line 2: let qty = 6; // typed by the user
   line 3: let total = price * qty;
   line 4: show(total); (a) line 3 (b) line 2 (c) line 1 (d) line 4
7. 7.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
8. 8.True or false: a buzz (vibration) is an output. (a) True (b) False
9. 9.Which of these is processing? (a) a result on screen (b) typing your age (c) a beep sound (d) working out a tip
10. 10.🔍 Which is the odd one out? (a) working out a tip (b) sorting the scores (c) typing your age (d) checking a password
11. 11.True or false: sorting the scores is processing. (a) False (b) True
12. 12.🔍 Which is the odd one out? (a) a result on screen (b) a pop-up message (c) a beep sound (d) speaking a command
13. 13.Which of these is an output? (a) a buzz (vibration) (b) checking a password (c) typing your age (d) sorting the scores
14. 14.Which of these is an input? (a) a beep sound (b) sorting the scores (c) working out a tip (d) tapping a button
15. 15.⚙️ What number does this app show?
    let price = 45; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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 1 (b) line 2 (c) line 4 (d) line 3
17. 17.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
18. 18.🔍 Which is the odd one out? (a) a pop-up message (b) a buzz (vibration) (c) a beep sound (d) sorting the scores
19. 19.True or false: a beep sound is processing. (a) True (b) False
20. 20.True or false: speaking a command is an input. (a) False (b) True
21. 21.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) input (c) processing
22. 22.True or false: a result on screen is an output. (a) False (b) True
23. 23.⚙️ What number does this app show?
    let price = 440; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 14; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 106; // typed by the user
    line 2: let friends = 2; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 1 (b) line 2 (c) line 3 (d) line 4
26. 26.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) input (c) processing
27. 27.Which of these is processing? (a) adding up a bill (b) speaking a command (c) typing your age (d) a result on screen
28. 28.⚙️ What number does this app show?
    let price = 520; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
29. 29.🔍 Which is the odd one out? (a) a buzz (vibration) (b) taking a photo (c) tapping a button (d) typing your age
30. 30.Which of these is an input? (a) typing your age (b) a result on screen (c) adding up a bill (d) a buzz (vibration)
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 4 (b) line 1 (c) line 2 (d) line 3
32. 32.🔍 Which is the odd one out? (a) a buzz (vibration) (b) adding up a bill (c) a beep sound (d) a result on screen
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 25; // 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 4 (b) line 1 (c) line 3 (d) line 2
34. 34.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) a result on screen (d) speaking a command
35. 35.Which of these is an output? (a) a beep sound (b) working out a tip (c) sorting the scores (d) adding up a bill
36. 36.Which of these is an input? (a) taking a photo (b) working out a tip (c) adding up a bill (d) a pop-up message
37. 37.⚙️ What number does this app show?
    let bill = 30; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 140; // 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 4 (c) line 3 (d) line 2
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 400; // 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 2 (b) line 4 (c) line 3 (d) line 1
40. 40.🔍 Which is the odd one out? (a) typing your age (b) a beep sound (c) speaking a command (d) taking a photo

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