App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 916 · 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 input? (a) adding up a bill (b) tapping a button (c) a beep sound (d) sorting the scores
2. 2.⚙️ 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
3. 3.🔍 Which is the odd one out? (a) taking a photo (b) tapping a button (c) adding up a bill (d) speaking a command
4. 4.🔍 Which is the odd one out? (a) a buzz (vibration) (b) speaking a command (c) typing your age (d) tapping a button
5. 5.⚙️ What number does this app show?
   let price = 25; // typed by the user
   let qty = 5; // typed by the user
   let total = price * qty;
   show(total);
6. 6.True or false: speaking a command is processing. (a) True (b) False
7. 7.Which of these is processing? (a) taking a photo (b) typing your age (c) checking a password (d) a beep sound
8. 8.🔍 Which is the odd one out? (a) tapping a button (b) adding up a bill (c) checking a password (d) working out a tip
9. 9.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) output (c) input
10. 10.True or false: tapping a button is processing. (a) True (b) False
11. 11.⚙️ What number does this app show?
    let price = 65; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
12. 12.True or false: taking a photo is processing. (a) False (b) True
13. 13.True or false: a beep sound is an input. (a) True (b) False
14. 14.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
15. 15.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 237; // 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
16. 16.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) a result on screen (d) typing your age
17. 17.Which of these is processing? (a) adding up a bill (b) speaking a command (c) a buzz (vibration) (d) a result on screen
18. 18.True or false: a beep sound is processing. (a) True (b) False
19. 19.⚙️ 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 3 (c) line 2
20. 20.True or false: a buzz (vibration) is an input. (a) False (b) True
21. 21.⚙️ What number does this app show?
    let price = 80; // typed by the user
    let qty = 2; // typed by the user
    let total = price * qty;
    show(total);
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 8; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
23. 23.True or false: checking a password is processing. (a) False (b) True
24. 24.True or false: adding up a bill is an input. (a) True (b) False
25. 25.⚙️ What number does this app show?
    let bill = 74; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
26. 26.⚙️ What number does this app show?
    let price = 85; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
27. 27.Which of these is an input? (a) typing your age (b) checking a password (c) a pop-up message (d) a beep sound
28. 28.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
29. 29.⚙️ In an app, is typing your age an input, processing or an output? (a) output (b) input (c) processing
30. 30.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) checking a password (d) speaking a command
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 105; // 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
32. 32.🔍 Which is the odd one out? (a) adding up a bill (b) sorting the scores (c) working out a tip (d) a beep sound
33. 33.Which of these is an output? (a) a pop-up message (b) typing your age (c) taking a photo (d) working out a tip
34. 34.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 198; // 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 3 (b) line 4 (c) line 1 (d) line 2
35. 35.Which of these is processing? (a) a buzz (vibration) (b) typing your age (c) working out a tip (d) taking a photo
36. 36.Which of these is an output? (a) speaking a command (b) a result on screen (c) tapping a button (d) taking a photo
37. 37.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 60; // 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
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 15; // 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 3 (b) line 1 (c) line 2 (d) line 4
39. 39.⚙️ What number does this app show?
    let bill = 159; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
40. 40.True or false: sorting the scores is an input. (a) True (b) False

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