App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 466 · 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) tapping a button (c) a buzz (vibration) (d) typing your age
2. 2.True or false: a pop-up message is an output. (a) True (b) False
3. 3.True or false: taking a photo is an input. (a) True (b) False
4. 4.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 4; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
5. 5.True or false: sorting the scores is processing. (a) False (b) True
6. 6.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 420; // 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 1 (c) line 2 (d) line 3
7. 7.⚙️ What number does this app show?
   let price = 150; // typed by the user
   let off = 40; // typed by the user
   let pay = price - off;
   show(pay);
8. 8.⚙️ What number does this app show?
   let km = 2; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.⚙️ What number does this app show?
   let price = 230; // typed by the user
   let off = 40; // typed by the user
   let pay = price - off;
   show(pay);
10. 10.🔍 Which is the odd one out? (a) tapping a button (b) adding up a bill (c) checking a password (d) working out a tip
11. 11.🔍 Which is the odd one out? (a) typing your age (b) a result on screen (c) a beep sound (d) a pop-up message
12. 12.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);
13. 13.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) taking a photo (d) a result on screen
14. 14.Which of these is an output? (a) working out a tip (b) speaking a command (c) a beep sound (d) checking a password
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 95; // typed by the user
    line 2: let qty = 5; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 2 (b) line 3 (c) line 1 (d) line 4
16. 16.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
17. 17.⚙️ 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
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 168; // 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 1 (b) line 2 (c) line 4 (d) line 3
19. 19.True or false: a buzz (vibration) is an output. (a) False (b) True
20. 20.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) input (c) processing
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 370; // 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
22. 22.Which of these is an input? (a) a buzz (vibration) (b) sorting the scores (c) tapping a button (d) working out a tip
23. 23.Which of these is an output? (a) typing your age (b) taking a photo (c) checking a password (d) a buzz (vibration)
24. 24.True or false: speaking a command is processing. (a) False (b) True
25. 25.⚙️ What number does this app show?
    let price = 110; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
26. 26.Which of these is processing? (a) working out a tip (b) tapping a button (c) a beep sound (d) a buzz (vibration)
27. 27.True or false: sorting the scores is an output. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) tapping a button (d) a pop-up message
29. 29.🔍 Which is the odd one out? (a) adding up a bill (b) working out a tip (c) a beep sound (d) checking a password
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 7; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
31. 31.🔍 Which is the odd one out? (a) adding up a bill (b) taking a photo (c) tapping a button (d) speaking a command
32. 32.🔍 Which is the odd one out? (a) tapping a button (b) working out a tip (c) speaking a command (d) taking a photo
33. 33.⚙️ What number does this app show?
    let bill = 250; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
34. 34.⚙️ In an app, is a result on screen an input, processing or an output? (a) input (b) processing (c) output
35. 35.Which of these is processing? (a) typing your age (b) adding up a bill (c) taking a photo (d) a beep sound
36. 36.🔍 Which is the odd one out? (a) adding up a bill (b) checking a password (c) speaking a command (d) sorting the scores
37. 37.True or false: working out a tip is processing. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a pop-up message (b) a beep sound (c) a result on screen (d) checking a password
39. 39.True or false: typing your age is an output. (a) True (b) False
40. 40.True or false: checking a password is an input. (a) True (b) False

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