App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 876 · 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: tapping a button is an output. (a) True (b) False
2. 2.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) output (c) input
3. 3.Which of these is an input? (a) a buzz (vibration) (b) working out a tip (c) speaking a command (d) checking a password
4. 4.🔍 Which is the odd one out? (a) adding up a bill (b) typing your age (c) sorting the scores (d) working out a tip
5. 5.True or false: a beep sound is an input. (a) False (b) True
6. 6.True or false: a pop-up message is an input. (a) True (b) False
7. 7.Which of these is processing? (a) a pop-up message (b) adding up a bill (c) tapping a button (d) typing your age
8. 8.⚙️ Which line does the processing (works out the answer)?
   line 1: let bill = 180; // 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 4 (d) line 3
9. 9.⚙️ What number does this app show?
   let price = 520; // typed by the user
   let off = 20; // typed by the user
   let pay = price - off;
   show(pay);
10. 10.True or false: a result on screen is processing. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a buzz (vibration) (b) checking a password (c) sorting the scores (d) adding up a bill
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 74; // 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 3 (b) line 2 (c) line 1 (d) line 4
13. 13.Which of these is processing? (a) speaking a command (b) a beep sound (c) checking a password (d) typing your age
14. 14.⚙️ What number does this app show?
    let price = 290; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 8; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
16. 16.True or false: sorting the scores is an input. (a) False (b) True
17. 17.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
18. 18.⚙️ What number does this app show?
    let bill = 126; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
19. 19.True or false: a result on screen is an input. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) checking a password (b) typing your age (c) speaking a command (d) tapping a button
21. 21.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 320; // 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 4 (c) line 2 (d) line 3
23. 23.Which of these is an output? (a) a buzz (vibration) (b) speaking a command (c) typing your age (d) adding up a bill
24. 24.Which of these is an output? (a) a beep sound (b) adding up a bill (c) typing your age (d) taking a photo
25. 25.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
26. 26.⚙️ What number does this app show?
    let bill = 234; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
27. 27.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) taking a photo (d) adding up a bill
28. 28.🔍 Which is the odd one out? (a) a beep sound (b) speaking a command (c) a result on screen (d) a buzz (vibration)
29. 29.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) working out a tip (d) a pop-up message
30. 30.🔍 Which is the odd one out? (a) working out a tip (b) checking a password (c) adding up a bill (d) a result on screen
31. 31.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) taking a photo (d) a pop-up message
32. 32.⚙️ What number does this app show?
    let bill = 190; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
33. 33.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
34. 34.⚙️ What number does this app show?
    let bill = 172; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 310; // 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 3 (b) line 1 (c) line 2 (d) line 4
36. 36.Which of these is an input? (a) a beep sound (b) adding up a bill (c) working out a tip (d) typing your age
37. 37.True or false: checking a password is an input. (a) True (b) False
38. 38.⚙️ What number does this app show?
    let bill = 177; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 120; // typed by the user
    line 2: let off = 50; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 3 (b) line 4 (c) line 2 (d) line 1
40. 40.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing

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