App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 990 · 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) taking a photo (b) a result on screen (c) a pop-up message (d) a buzz (vibration)
2. 2.🔍 Which is the odd one out? (a) a beep sound (b) taking a photo (c) tapping a button (d) typing your age
3. 3.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
4. 4.⚙️ In an app, is tapping a button an input, processing or an output? (a) input (b) output (c) processing
5. 5.Which of these is an output? (a) taking a photo (b) typing your age (c) a pop-up message (d) tapping a button
6. 6.🔍 Which is the odd one out? (a) working out a tip (b) sorting the scores (c) tapping a button (d) adding up a bill
7. 7.⚙️ What number does this app show?
   let price = 140; // typed by the user
   let off = 10; // typed by the user
   let pay = price - off;
   show(pay);
8. 8.⚙️ What number does this app show?
   let price = 35; // typed by the user
   let qty = 4; // typed by the user
   let total = price * qty;
   show(total);
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 170; // typed by the user
   line 2: let off = 30; // typed by the user
   line 3: let pay = price - off;
   line 4: show(pay); (a) line 1 (b) line 2 (c) line 4 (d) line 3
10. 10.Which of these is an input? (a) tapping a button (b) a pop-up message (c) working out a tip (d) checking a password
11. 11.True or false: tapping a button is an input. (a) False (b) True
12. 12.Which of these is processing? (a) a beep sound (b) checking a password (c) a buzz (vibration) (d) typing your age
13. 13.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) a pop-up message (d) adding up a bill
14. 14.True or false: a result on screen is an output. (a) True (b) False
15. 15.Which of these is an input? (a) typing your age (b) checking a password (c) a result on screen (d) sorting the scores
16. 16.⚙️ In an app, is speaking a command an input, processing or an output? (a) processing (b) output (c) input
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.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
19. 19.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) checking a password (d) a result on screen
20. 20.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) output (c) processing
21. 21.⚙️ What number does this app show?
    let price = 130; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
22. 22.🔍 Which is the odd one out? (a) a pop-up message (b) a result on screen (c) a beep sound (d) typing your age
23. 23.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 130; // typed by the user
    line 2: let off = 30; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 1 (b) line 2 (c) line 4 (d) line 3
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 129; // 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
26. 26.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) output (c) processing
27. 27.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) sorting the scores (d) speaking a command
28. 28.🔍 Which is the odd one out? (a) working out a tip (b) taking a photo (c) typing your age (d) speaking a command
29. 29.True or false: a buzz (vibration) is processing. (a) False (b) True
30. 30.⚙️ What number does this app show?
    let bill = 116; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
31. 31.True or false: sorting the scores is processing. (a) False (b) True
32. 32.⚙️ What number does this app show?
    let bill = 275; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
33. 33.Which of these is processing? (a) tapping a button (b) a result on screen (c) working out a tip (d) a pop-up message
34. 34.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) taking a photo (d) a pop-up message
35. 35.⚙️ What number does this app show?
    let price = 90; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 3 (b) line 2 (c) line 1 (d) line 4
37. 37.True or false: typing your age is processing. (a) True (b) False
38. 38.Which of these is an output? (a) a buzz (vibration) (b) checking a password (c) speaking a command (d) working out a tip
39. 39.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) processing (c) output
40. 40.Which of these is an input? (a) a result on screen (b) taking a photo (c) a buzz (vibration) (d) working out a tip

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