App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 587 · 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 of these is an output? (a) tapping a button (b) sorting the scores (c) working out a tip (d) a result on screen
2. 2.Which of these is an input? (a) adding up a bill (b) a beep sound (c) tapping a button (d) checking a password
3. 3.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a beep sound (c) taking a photo (d) a result on screen
4. 4.🔍 Which is the odd one out? (a) adding up a bill (b) checking a password (c) sorting the scores (d) a buzz (vibration)
5. 5.Which of these is processing? (a) sorting the scores (b) a buzz (vibration) (c) a beep sound (d) tapping a button
6. 6.⚙️ What number does this app show?
   let price = 450; // typed by the user
   let off = 50; // typed by the user
   let pay = price - off;
   show(pay);
7. 7.⚙️ What number does this app show?
   let price = 10; // typed by the user
   let qty = 6; // typed by the user
   let total = price * qty;
   show(total);
8. 8.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) output (c) input
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 8; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
10. 10.True or false: a beep sound is an output. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) typing your age (b) a result on screen (c) speaking a command (d) taking a photo
12. 12.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) a pop-up message (d) typing your age
13. 13.⚙️ In an app, is a beep sound an input, processing or an output? (a) output (b) input (c) processing
14. 14.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
15. 15.🔍 Which is the odd one out? (a) sorting the scores (b) adding up a bill (c) working out a tip (d) a beep sound
16. 16.True or false: typing your age is an output. (a) False (b) True
17. 17.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) output (c) processing
18. 18.⚙️ What number does this app show?
    let bill = 308; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
19. 19.True or false: tapping a button is an output. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) typing your age (b) sorting the scores (c) speaking a command (d) tapping a button
21. 21.⚙️ 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 1 (b) line 3 (c) line 4 (d) line 2
22. 22.⚙️ In an app, is typing your age 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 bill = 292; // typed by the user
    line 2: let friends = 4; // typed by the user
    line 3: let share = bill / friends;
    line 4: show(share); (a) line 4 (b) line 3 (c) line 1 (d) line 2
24. 24.True or false: adding up a bill is processing. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) typing your age (d) a pop-up message
26. 26.⚙️ What number does this app show?
    let price = 10; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
27. 27.⚙️ What number does this app show?
    let bill = 237; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
28. 28.True or false: working out a tip is processing. (a) False (b) True
29. 29.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) output (c) input
30. 30.Which of these is an input? (a) typing your age (b) a buzz (vibration) (c) a pop-up message (d) sorting the scores
31. 31.⚙️ What number does this app show?
    let km = 7; // typed by the user
    let metres = km * 1000;
    show(metres);
32. 32.⚙️ 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);
33. 33.Which of these is processing? (a) typing your age (b) checking a password (c) tapping a button (d) taking a photo
34. 34.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) input (c) processing
35. 35.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 160; // typed by the user
    line 2: let off = 50; // 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
36. 36.⚙️ What number does this app show?
    let bill = 40; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
37. 37.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
38. 38.🔍 Which is the odd one out? (a) typing your age (b) checking a password (c) taking a photo (d) tapping a button
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 6; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
40. 40.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 570; // 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 1 (b) line 4 (c) line 3 (d) line 2

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