App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 654 · 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) working out a tip (b) sorting the scores (c) typing your age (d) checking a password
2. 2.True or false: sorting the scores is an output. (a) True (b) False
3. 3.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
4. 4.⚙️ What number does this app show?
   let price = 270; // typed by the user
   let off = 20; // typed by the user
   let pay = price - off;
   show(pay);
5. 5.⚙️ What number does this app show?
   let price = 320; // typed by the user
   let off = 30; // typed by the user
   let pay = price - off;
   show(pay);
6. 6.True or false: sorting the scores is an input. (a) True (b) False
7. 7.⚙️ What number does this app show?
   let km = 6; // typed by the user
   let metres = km * 1000;
   show(metres);
8. 8.⚙️ What number does this app show?
   let km = 12; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.Which of these is an input? (a) a result on screen (b) taking a photo (c) working out a tip (d) a buzz (vibration)
10. 10.🔍 Which is the odd one out? (a) a beep sound (b) sorting the scores (c) a pop-up message (d) a result on screen
11. 11.🔍 Which is the odd one out? (a) a buzz (vibration) (b) speaking a command (c) a beep sound (d) a result on screen
12. 12.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
13. 13.True or false: speaking a command is an output. (a) True (b) False
14. 14.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) processing (c) output
15. 15.⚙️ What number does this app show?
    let bill = 45; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
16. 16.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
17. 17.Which of these is an input? (a) a result on screen (b) checking a password (c) speaking a command (d) a pop-up message
18. 18.Which of these is an output? (a) typing your age (b) a pop-up message (c) tapping a button (d) taking a photo
19. 19.⚙️ What number does this app show?
    let bill = 213; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
20. 20.🔍 Which is the odd one out? (a) a result on screen (b) a buzz (vibration) (c) a beep sound (d) working out a tip
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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
22. 22.True or false: typing your age is an input. (a) True (b) False
23. 23.Which of these is an output? (a) a result on screen (b) taking a photo (c) speaking a command (d) tapping a button
24. 24.⚙️ What number does this app show?
    let price = 75; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
25. 25.True or false: adding up a bill is an output. (a) True (b) False
26. 26.True or false: a buzz (vibration) is an output. (a) True (b) False
27. 27.⚙️ What number does this app show?
    let price = 240; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
28. 28.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
29. 29.⚙️ What number does this app show?
    let price = 40; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
30. 30.Which of these is an input? (a) adding up a bill (b) working out a tip (c) typing your age (d) sorting the scores
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 132; // 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 4 (d) line 3
32. 32.Which of these is processing? (a) sorting the scores (b) a pop-up message (c) a result on screen (d) a beep sound
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 126; // 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 4 (b) line 3 (c) line 2 (d) line 1
35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 190; // 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 2 (b) line 4 (c) line 1 (d) line 3
36. 36.Which of these is processing? (a) a beep sound (b) checking a password (c) taking a photo (d) a pop-up message
37. 37.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) output (c) processing
38. 38.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) processing (c) input
39. 39.⚙️ What number does this app show?
    let bill = 38; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
40. 40.True or false: typing your age is an output. (a) False (b) True

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