App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 555 · 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 processing? (a) working out a tip (b) a buzz (vibration) (c) speaking a command (d) tapping a button
2. 2.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
3. 3.🔍 Which is the odd one out? (a) checking a password (b) a beep sound (c) working out a tip (d) sorting the scores
4. 4.Which of these is an output? (a) sorting the scores (b) tapping a button (c) taking a photo (d) a beep sound
5. 5.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) processing (c) output
6. 6.True or false: a result on screen is an output. (a) False (b) True
7. 7.⚙️ What number does this app show?
   let price = 90; // typed by the user
   let qty = 5; // typed by the user
   let total = price * qty;
   show(total);
8. 8.⚙️ What number does this app show?
   let km = 4; // typed by the user
   let metres = km * 1000;
   show(metres);
9. 9.⚙️ What number does this app show?
   let price = 100; // typed by the user
   let qty = 6; // typed by the user
   let total = price * qty;
   show(total);
10. 10.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
11. 11.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 3; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 3 (c) line 2
12. 12.True or false: working out a tip is an input. (a) False (b) True
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 340; // 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 1 (d) line 4
14. 14.Which of these is an output? (a) a buzz (vibration) (b) checking a password (c) speaking a command (d) taking a photo
15. 15.True or false: speaking a command is an input. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) a buzz (vibration) (b) adding up a bill (c) working out a tip (d) sorting the scores
17. 17.🔍 Which is the odd one out? (a) a pop-up message (b) a result on screen (c) typing your age (d) a beep sound
18. 18.Which of these is processing? (a) checking a password (b) a buzz (vibration) (c) a result on screen (d) speaking a command
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 100; // 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 3 (b) line 2 (c) line 1 (d) line 4
20. 20.True or false: checking a password is processing. (a) False (b) True
21. 21.⚙️ What number does this app show?
    let price = 340; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
22. 22.⚙️ 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);
23. 23.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) processing (b) input (c) output
24. 24.True or false: taking a photo is an input. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) sorting the scores (b) speaking a command (c) working out a tip (d) adding up a bill
26. 26.True or false: typing your age is an input. (a) True (b) False
27. 27.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
28. 28.True or false: a pop-up message is an input. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) taking a photo (b) a result on screen (c) a pop-up message (d) a beep sound
30. 30.🔍 Which is the odd one out? (a) working out a tip (b) speaking a command (c) tapping a button (d) taking a photo
31. 31.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 4; // typed by the user
    let total = price * qty;
    show(total);
32. 32.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) checking a password (d) a pop-up message
33. 33.⚙️ In an app, is a pop-up message an input, processing or an output? (a) processing (b) output (c) input
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 325; // 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 1 (c) line 4 (d) line 3
35. 35.Which of these is an input? (a) adding up a bill (b) a pop-up message (c) checking a password (d) speaking a command
36. 36.🔍 Which is the odd one out? (a) speaking a command (b) tapping a button (c) a result on screen (d) taking a photo
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 50; // 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 3 (b) line 2 (c) line 1 (d) line 4
38. 38.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) processing (c) input
39. 39.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 50; // 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
40. 40.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 5; // typed by the user
    let total = price * qty;
    show(total);

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