App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 436 · 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: typing your age is an output. (a) True (b) False
2. 2.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) input (c) output
3. 3.True or false: checking a password is an input. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) taking a photo (b) a beep sound (c) a pop-up message (d) a result on screen
5. 5.Which of these is an input? (a) sorting the scores (b) tapping a button (c) adding up a bill (d) checking a password
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 3; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
7. 7.⚙️ What number does this app show?
   let price = 70; // typed by the user
   let qty = 5; // typed by the user
   let total = price * qty;
   show(total);
8. 8.Which of these is an input? (a) adding up a bill (b) typing your age (c) a pop-up message (d) a result on screen
9. 9.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) processing (c) output
10. 10.⚙️ In an app, is a beep sound an input, processing or an output? (a) input (b) output (c) processing
11. 11.🔍 Which is the odd one out? (a) speaking a command (b) a result on screen (c) typing your age (d) taking a photo
12. 12.True or false: tapping a button is an input. (a) True (b) False
13. 13.True or false: checking a password is processing. (a) False (b) True
14. 14.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 590; // 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 4 (b) line 1 (c) line 3 (d) line 2
15. 15.🔍 Which is the odd one out? (a) a beep sound (b) adding up a bill (c) checking a password (d) sorting the scores
16. 16.⚙️ What number does this app show?
    let bill = 104; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
17. 17.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) tapping a button (d) working out a tip
18. 18.⚙️ What number does this app show?
    let price = 45; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 144; // 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 1 (c) line 2 (d) line 4
20. 20.Which of these is processing? (a) sorting the scores (b) speaking a command (c) typing your age (d) tapping a button
21. 21.True or false: adding up a bill is an input. (a) True (b) False
22. 22.⚙️ What number does this app show?
    let km = 12; // typed by the user
    let metres = km * 1000;
    show(metres);
23. 23.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) output (c) processing
24. 24.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) a result on screen (d) adding up a bill
25. 25.Which of these is an output? (a) a result on screen (b) speaking a command (c) sorting the scores (d) taking a photo
26. 26.Which of these is an input? (a) checking a password (b) taking a photo (c) adding up a bill (d) a buzz (vibration)
27. 27.⚙️ What number does this app show?
    let bill = 134; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
28. 28.Which of these is an input? (a) a beep sound (b) a result on screen (c) checking a password (d) speaking a command
29. 29.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) sorting the scores (d) a beep sound
30. 30.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
31. 31.🔍 Which is the odd one out? (a) checking a password (b) a result on screen (c) a pop-up message (d) a beep sound
32. 32.🔍 Which is the odd one out? (a) sorting the scores (b) tapping a button (c) checking a password (d) working out a tip
33. 33.True or false: a result on screen is an output. (a) False (b) True
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 510; // 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 4 (b) line 1 (c) line 2 (d) line 3
35. 35.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) input (c) processing
36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 80; // 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 4 (b) line 3 (c) line 2 (d) line 1
37. 37.Which of these is processing? (a) typing your age (b) adding up a bill (c) a pop-up message (d) a result on screen
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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
39. 39.🔍 Which is the odd one out? (a) tapping a button (b) taking a photo (c) a buzz (vibration) (d) typing your age
40. 40.⚙️ What number does this app show?
    let price = 210; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);

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