App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 796 · 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) False (b) True
2. 2.⚙️ In an app, is a pop-up message an input, processing or an output? (a) output (b) processing (c) input
3. 3.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
4. 4.⚙️ What number does this app show?
   let bill = 106; // typed by the user
   let friends = 2; // typed by the user
   let share = bill / friends;
   show(share);
5. 5.True or false: a buzz (vibration) is processing. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) working out a tip (d) a pop-up message
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let bill = 315; // 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 3 (b) line 4 (c) line 1 (d) line 2
8. 8.⚙️ What number does this app show?
   let price = 10; // typed by the user
   let qty = 5; // typed by the user
   let total = price * qty;
   show(total);
9. 9.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) output (c) input
10. 10.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
11. 11.Which of these is an output? (a) typing your age (b) taking a photo (c) a beep sound (d) speaking a command
12. 12.⚙️ What number does this app show?
    let price = 100; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 390; // typed by the user
    line 2: let off = 20; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 4 (b) line 3 (c) line 1 (d) line 2
14. 14.⚙️ What number does this app show?
    let bill = 69; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
15. 15.🔍 Which is the odd one out? (a) speaking a command (b) working out a tip (c) sorting the scores (d) checking a password
16. 16.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 40; // 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 1 (c) line 2 (d) line 3
17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 360; // typed by the user
    line 2: let off = 20; // typed by the user
    line 3: let pay = price - off;
    line 4: show(pay); (a) line 2 (b) line 4 (c) line 3 (d) line 1
18. 18.True or false: adding up a bill is an input. (a) True (b) False
19. 19.Which of these is processing? (a) speaking a command (b) sorting the scores (c) a buzz (vibration) (d) taking a photo
20. 20.True or false: a pop-up message is an output. (a) True (b) False
21. 21.True or false: a buzz (vibration) is an output. (a) False (b) True
22. 22.⚙️ In an app, is sorting the scores an input, processing or an output? (a) input (b) processing (c) output
23. 23.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 1 (b) line 3 (c) line 2 (d) line 4
24. 24.Which of these is an output? (a) taking a photo (b) checking a password (c) adding up a bill (d) a buzz (vibration)
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 1 (b) line 2 (c) line 4 (d) line 3
26. 26.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) a pop-up message (d) sorting the scores
27. 27.True or false: tapping a button is processing. (a) False (b) True
28. 28.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 260; // typed by the user
    line 2: let off = 20; // 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
29. 29.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
30. 30.Which of these is processing? (a) a beep sound (b) working out a tip (c) tapping a button (d) taking a photo
31. 31.True or false: checking a password is an output. (a) False (b) True
32. 32.Which of these is an input? (a) a pop-up message (b) typing your age (c) adding up a bill (d) a beep sound
33. 33.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
34. 34.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);
35. 35.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
36. 36.True or false: adding up a bill is processing. (a) False (b) True
37. 37.⚙️ What number does this app show?
    let bill = 52; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
38. 38.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) a result on screen (d) typing your age
39. 39.Which of these is processing? (a) a result on screen (b) taking a photo (c) typing your age (d) adding up a bill
40. 40.True or false: a beep sound is processing. (a) False (b) True

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