App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 989 · 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: a beep sound is an output. (a) True (b) False
2. 2.🔍 Which is the odd one out? (a) checking a password (b) working out a tip (c) a beep sound (d) sorting the scores
3. 3.True or false: a buzz (vibration) is an input. (a) True (b) False
4. 4.Which of these is processing? (a) tapping a button (b) typing your age (c) sorting the scores (d) a pop-up message
5. 5.🔍 Which is the odd one out? (a) tapping a button (b) working out a tip (c) adding up a bill (d) sorting the scores
6. 6.⚙️ In an app, is adding up a bill an input, processing or an output? (a) processing (b) output (c) input
7. 7.True or false: tapping a button is an input. (a) True (b) False
8. 8.Which of these is an output? (a) taking a photo (b) a beep sound (c) tapping a button (d) typing your age
9. 9.Which of these is an output? (a) checking a password (b) a pop-up message (c) taking a photo (d) typing your age
10. 10.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
11. 11.Which of these is an input? (a) working out a tip (b) checking a password (c) speaking a command (d) a result on screen
12. 12.⚙️ What number does this app show?
    let price = 220; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
13. 13.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) speaking a command (d) a result on screen
14. 14.True or false: adding up a bill is processing. (a) True (b) False
15. 15.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) output (c) input
16. 16.🔍 Which is the odd one out? (a) taking a photo (b) speaking a command (c) adding up a bill (d) tapping a button
17. 17.⚙️ What number does this app show?
    let bill = 300; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 75; // typed by the user
    line 2: let friends = 3; // 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
19. 19.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 11; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
20. 20.True or false: speaking a command is processing. (a) False (b) True
21. 21.⚙️ What number does this app show?
    let price = 30; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
22. 22.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) output (b) processing (c) input
23. 23.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
24. 24.True or false: a pop-up message is an input. (a) True (b) False
25. 25.⚙️ 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 2 (c) line 1
26. 26.⚙️ What number does this app show?
    let bill = 216; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
27. 27.⚙️ In an app, is a pop-up message an input, processing or an output? (a) input (b) processing (c) output
28. 28.🔍 Which is the odd one out? (a) working out a tip (b) typing your age (c) taking a photo (d) speaking a command
29. 29.Which of these is processing? (a) typing your age (b) a buzz (vibration) (c) taking a photo (d) adding up a bill
30. 30.⚙️ What number does this app show?
    let price = 55; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 3 (b) line 2 (c) line 4 (d) line 1
32. 32.True or false: speaking a command is an input. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) speaking a command (b) taking a photo (c) tapping a button (d) sorting the scores
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 390; // 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 4 (b) line 2 (c) line 1 (d) line 3
35. 35.🔍 Which is the odd one out? (a) a pop-up message (b) a beep sound (c) taking a photo (d) a buzz (vibration)
36. 36.⚙️ 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
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 156; // 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 2 (b) line 4 (c) line 1 (d) line 3
38. 38.⚙️ What number does this app show?
    let bill = 100; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
39. 39.⚙️ In an app, is checking a password an input, processing or an output? (a) processing (b) input (c) output
40. 40.🔍 Which is the odd one out? (a) tapping a button (b) typing your age (c) checking a password (d) taking a photo

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