App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 563 · 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) adding up a bill (b) a pop-up message (c) checking a password (d) typing your age
2. 2.🔍 Which is the odd one out? (a) sorting the scores (b) typing your age (c) speaking a command (d) taking a photo
3. 3.⚙️ What number does this app show?
   let bill = 350; // typed by the user
   let friends = 5; // typed by the user
   let share = bill / friends;
   show(share);
4. 4.Which of these is an input? (a) a beep sound (b) checking a password (c) working out a tip (d) taking a photo
5. 5.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 13; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
6. 6.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
7. 7.Which of these is processing? (a) checking a password (b) a buzz (vibration) (c) a beep sound (d) taking a photo
8. 8.Which of these is an input? (a) speaking a command (b) checking a password (c) a result on screen (d) working out a tip
9. 9.🔍 Which is the odd one out? (a) adding up a bill (b) taking a photo (c) working out a tip (d) checking a password
10. 10.Which of these is processing? (a) adding up a bill (b) typing your age (c) a result on screen (d) taking a photo
11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 5; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
12. 12.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) processing (c) input
13. 13.⚙️ What number does this app show?
    let price = 560; // typed by the user
    let off = 40; // typed by the user
    let pay = price - off;
    show(pay);
14. 14.🔍 Which is the odd one out? (a) adding up a bill (b) a buzz (vibration) (c) working out a tip (d) sorting the scores
15. 15.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
16. 16.Which of these is an input? (a) adding up a bill (b) a buzz (vibration) (c) typing your age (d) checking a password
17. 17.True or false: typing your age is an input. (a) False (b) True
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // typed by the user
    line 2: let qty = 6; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 1 (b) line 4 (c) line 3 (d) line 2
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 95; // typed by the user
    line 2: let qty = 6; // 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
20. 20.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) a result on screen (d) speaking a command
21. 21.Which of these is processing? (a) a buzz (vibration) (b) sorting the scores (c) a result on screen (d) a beep sound
22. 22.⚙️ What number does this app show?
    let price = 75; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
23. 23.True or false: a pop-up message is an output. (a) True (b) False
24. 24.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 560; // 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 2 (b) line 3 (c) line 4 (d) line 1
25. 25.⚙️ What number does this app show?
    let price = 280; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
26. 26.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
27. 27.True or false: working out a tip is an output. (a) False (b) True
28. 28.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 75; // 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
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 2; // 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.True or false: tapping a button is an input. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) checking a password (b) a beep sound (c) working out a tip (d) sorting the scores
33. 33.⚙️ In an app, is working out a tip an input, processing or an output? (a) output (b) input (c) processing
34. 34.True or false: adding up a bill is processing. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) working out a tip (b) a pop-up message (c) a buzz (vibration) (d) a result on screen
36. 36.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 215; // 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 1 (b) line 2 (c) line 3 (d) line 4
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 12; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
38. 38.True or false: taking a photo is processing. (a) False (b) True
39. 39.Which of these is an input? (a) working out a tip (b) tapping a button (c) a beep sound (d) a buzz (vibration)
40. 40.⚙️ What number does this app show?
    let bill = 225; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);

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