App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 93 · 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: working out a tip is an input. (a) True (b) False
2. 2.Which of these is an output? (a) tapping a button (b) speaking a command (c) a result on screen (d) typing your age
3. 3.🔍 Which is the odd one out? (a) sorting the scores (b) a result on screen (c) checking a password (d) working out a tip
4. 4.🔍 Which is the odd one out? (a) speaking a command (b) typing your age (c) sorting the scores (d) tapping a button
5. 5.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) a beep sound (d) adding up a bill
6. 6.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) adding up a bill (d) taking a photo
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let bill = 84; // 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 2 (b) line 4 (c) line 1 (d) line 3
8. 8.⚙️ What number does this app show?
   let bill = 210; // typed by the user
   let friends = 3; // typed by the user
   let share = bill / friends;
   show(share);
9. 9.⚙️ What number does this app show?
   let bill = 115; // typed by the user
   let friends = 5; // typed by the user
   let share = bill / friends;
   show(share);
10. 10.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) processing (c) input
11. 11.🔍 Which is the odd one out? (a) working out a tip (b) tapping a button (c) speaking a command (d) typing your age
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 78; // 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 1 (b) line 2 (c) line 3 (d) line 4
13. 13.Which of these is processing? (a) tapping a button (b) a result on screen (c) sorting the scores (d) a buzz (vibration)
14. 14.True or false: a buzz (vibration) is an input. (a) False (b) True
15. 15.⚙️ What number does this app show?
    let price = 350; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 350; // 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 3 (c) line 2 (d) line 4
17. 17.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input
18. 18.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 2; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 3 (c) line 1
20. 20.⚙️ What number does this app show?
    let price = 450; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
21. 21.True or false: checking a password is an input. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) adding up a bill (b) checking a password (c) taking a photo (d) working out a tip
23. 23.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
24. 24.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
25. 25.True or false: sorting the scores is processing. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) working out a tip (b) adding up a bill (c) a pop-up message (d) sorting the scores
27. 27.True or false: sorting the scores is an output. (a) True (b) False
28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // typed by the user
    line 2: let qty = 2; // 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
29. 29.⚙️ What number does this app show?
    let km = 3; // typed by the user
    let metres = km * 1000;
    show(metres);
30. 30.True or false: speaking a command is processing. (a) True (b) False
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 22; // 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 4 (b) line 3 (c) line 2 (d) line 1
32. 32.True or false: taking a photo is an input. (a) False (b) True
33. 33.True or false: sorting the scores is an input. (a) True (b) False
34. 34.Which of these is an output? (a) tapping a button (b) a beep sound (c) speaking a command (d) typing your age
35. 35.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
36. 36.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
37. 37.Which of these is an input? (a) tapping a button (b) sorting the scores (c) a beep sound (d) checking a password
38. 38.Which of these is an output? (a) a buzz (vibration) (b) adding up a bill (c) speaking a command (d) taking a photo
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // typed by the user
    line 2: let qty = 2; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 4 (b) line 2 (c) line 3 (d) line 1
40. 40.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);

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