App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 128 · 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: a result on screen is an output. (a) False (b) True
2. 2.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) input (c) processing
3. 3.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
4. 4.True or false: typing your age is processing. (a) True (b) False
5. 5.True or false: typing your age is an input. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) speaking a command (b) typing your age (c) tapping a button (d) sorting the scores
7. 7.⚙️ What number does this app show?
   let price = 290; // typed by the user
   let off = 50; // typed by the user
   let pay = price - off;
   show(pay);
8. 8.⚙️ What number does this app show?
   let price = 510; // typed by the user
   let off = 30; // typed by the user
   let pay = price - off;
   show(pay);
9. 9.Which of these is an output? (a) a pop-up message (b) speaking a command (c) adding up a bill (d) checking a password
10. 10.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input
11. 11.🔍 Which is the odd one out? (a) a buzz (vibration) (b) typing your age (c) a result on screen (d) a pop-up message
12. 12.⚙️ What number does this app show?
    let km = 9; // typed by the user
    let metres = km * 1000;
    show(metres);
13. 13.Which of these is an input? (a) speaking a command (b) checking a password (c) working out a tip (d) a result on screen
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 3 (c) line 1
15. 15.True or false: a buzz (vibration) is processing. (a) True (b) False
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 12; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
17. 17.True or false: sorting the scores is an input. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) working out a tip (b) checking a password (c) sorting the scores (d) a pop-up message
19. 19.🔍 Which is the odd one out? (a) working out a tip (b) checking a password (c) adding up a bill (d) speaking a command
20. 20.⚙️ What number does this app show?
    let bill = 20; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
21. 21.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) output (c) processing
22. 22.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) processing (c) output
23. 23.True or false: sorting the scores is processing. (a) True (b) False
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 1 (b) line 2 (c) line 3 (d) line 4
25. 25.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
26. 26.⚙️ What number does this app show?
    let price = 110; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
27. 27.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) input (c) processing
28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 60; // 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 4 (b) line 1 (c) line 3 (d) line 2
29. 29.⚙️ 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 1 (b) line 3 (c) line 2 (d) line 4
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 410; // 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 1 (c) line 4 (d) line 3
31. 31.Which of these is an input? (a) a beep sound (b) a buzz (vibration) (c) working out a tip (d) typing your age
32. 32.⚙️ What number does this app show?
    let price = 510; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
33. 33.Which of these is an output? (a) tapping a button (b) speaking a command (c) a result on screen (d) typing your age
34. 34.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
35. 35.Which of these is processing? (a) a buzz (vibration) (b) tapping a button (c) taking a photo (d) sorting the scores
36. 36.True or false: tapping a button is processing. (a) False (b) True
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 450; // 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 1 (b) line 2 (c) line 3 (d) line 4
38. 38.True or false: working out a tip is an input. (a) True (b) False
39. 39.Which of these is an output? (a) working out a tip (b) a beep sound (c) checking a password (d) taking a photo
40. 40.True or false: taking a photo is an input. (a) True (b) False

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