App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 366 · 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 beep sound (b) a pop-up message (c) a result on screen (d) working out a tip
2. 2.🔍 Which is the odd one out? (a) speaking a command (b) sorting the scores (c) adding up a bill (d) checking a password
3. 3.True or false: a buzz (vibration) is an output. (a) True (b) False
4. 4.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 340; // 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 4 (b) line 2 (c) line 3 (d) line 1
5. 5.True or false: sorting the scores is processing. (a) True (b) False
6. 6.⚙️ What number does this app show?
   let bill = 165; // typed by the user
   let friends = 5; // typed by the user
   let share = bill / friends;
   show(share);
7. 7.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) input (c) processing
8. 8.True or false: speaking a command is an input. (a) True (b) False
9. 9.Which of these is an input? (a) sorting the scores (b) a buzz (vibration) (c) adding up a bill (d) taking a photo
10. 10.🔍 Which is the odd one out? (a) typing your age (b) a beep sound (c) speaking a command (d) taking a photo
11. 11.⚙️ What number does this app show?
    let price = 550; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
12. 12.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
13. 13.Which of these is an output? (a) adding up a bill (b) working out a tip (c) checking a password (d) a beep sound
14. 14.⚙️ 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 4 (b) line 2 (c) line 3 (d) line 1
15. 15.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) output (c) processing
16. 16.True or false: typing your age is processing. (a) False (b) True
17. 17.⚙️ What number does this app show?
    let bill = 215; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
18. 18.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) adding up a bill (d) a beep sound
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 72; // 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 3 (c) line 4 (d) line 1
20. 20.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) tapping a button (d) sorting the scores
21. 21.True or false: a pop-up message is an input. (a) True (b) False
22. 22.⚙️ 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 2 (b) line 1 (c) line 4 (d) line 3
23. 23.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) output (c) input
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 15; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 3 (c) line 1
25. 25.Which of these is processing? (a) checking a password (b) a result on screen (c) a pop-up message (d) tapping a button
26. 26.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
27. 27.⚙️ 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);
28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 75; // 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 3 (c) line 1 (d) line 2
29. 29.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
30. 30.True or false: sorting the scores is an input. (a) True (b) False
31. 31.⚙️ In an app, is working out a tip an input, processing or an output? (a) output (b) processing (c) input
32. 32.True or false: a pop-up message is an output. (a) False (b) True
33. 33.True or false: speaking a command is an output. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a buzz (vibration) (b) adding up a bill (c) checking a password (d) working out a tip
35. 35.🔍 Which is the odd one out? (a) taking a photo (b) a pop-up message (c) tapping a button (d) speaking a command
36. 36.True or false: a buzz (vibration) is processing. (a) True (b) False
37. 37.⚙️ What number does this app show?
    let price = 450; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
38. 38.Which of these is an input? (a) a beep sound (b) typing your age (c) a pop-up message (d) checking a password
39. 39.Which of these is an output? (a) adding up a bill (b) speaking a command (c) a buzz (vibration) (d) typing your age
40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 60; // 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 2 (c) line 1 (d) line 3

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