App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 403 · 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.True or false: checking a password is processing. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) a beep sound (b) adding up a bill (c) a result on screen (d) a pop-up message
3. 3.True or false: taking a photo is an output. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) taking a photo (b) adding up a bill (c) checking a password (d) working out a tip
5. 5.🔍 Which is the odd one out? (a) a result on screen (b) a beep sound (c) typing your age (d) a buzz (vibration)
6. 6.⚙️ What number does this app show?
   let bill = 152; // typed by the user
   let friends = 2; // typed by the user
   let share = bill / friends;
   show(share);
7. 7.Which of these is processing? (a) working out a tip (b) tapping a button (c) typing your age (d) a beep sound
8. 8.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) input (c) output
9. 9.⚙️ What number does this app show?
   let km = 15; // typed by the user
   let metres = km * 1000;
   show(metres);
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 106; // typed by the user
    line 2: let friends = 2; // 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
11. 11.Which of these is an output? (a) taking a photo (b) typing your age (c) a result on screen (d) working out a tip
12. 12.True or false: checking a password is an input. (a) False (b) True
13. 13.⚙️ What number does this app show?
    let price = 300; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
14. 14.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) tapping a button (d) a result on screen
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 80; // 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 2 (b) line 1 (c) line 4 (d) line 3
16. 16.True or false: typing your age is an input. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a buzz (vibration) (b) a pop-up message (c) working out a tip (d) a beep sound
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 440; // 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
19. 19.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing
20. 20.⚙️ In an app, is taking a photo an input, processing or an output? (a) input (b) processing (c) output
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 20; // 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 2 (b) line 4 (c) line 1 (d) line 3
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 25; // 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 2 (b) line 4 (c) line 3 (d) line 1
23. 23.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
24. 24.🔍 Which is the odd one out? (a) checking a password (b) taking a photo (c) typing your age (d) speaking a command
25. 25.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 365; // 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
26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // 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 3 (b) line 1 (c) line 4 (d) line 2
27. 27.True or false: a result on screen is an output. (a) False (b) True
28. 28.True or false: a result on screen is processing. (a) False (b) True
29. 29.Which of these is an input? (a) a result on screen (b) a beep sound (c) speaking a command (d) working out a tip
30. 30.⚙️ 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 2 (b) line 3 (c) line 1
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // typed by the user
    line 2: let qty = 2; // typed by the user
    line 3: let total = price * qty;
    line 4: show(total); (a) line 1 (b) line 4 (c) line 2 (d) line 3
32. 32.True or false: speaking a command is processing. (a) False (b) True
33. 33.⚙️ In an app, is working out a tip an input, processing or an output? (a) input (b) processing (c) output
34. 34.True or false: working out a tip is processing. (a) False (b) True
35. 35.⚙️ What number does this app show?
    let km = 2; // typed by the user
    let metres = km * 1000;
    show(metres);
36. 36.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) processing (c) output
37. 37.Which of these is an output? (a) sorting the scores (b) a buzz (vibration) (c) speaking a command (d) working out a tip
38. 38.Which of these is an input? (a) a beep sound (b) adding up a bill (c) typing your age (d) working out a tip
39. 39.True or false: adding up a bill is an input. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) a buzz (vibration) (d) taking a photo

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