App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 86 · 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.⚙️ In an app, is typing your age an input, processing or an output? (a) processing (b) output (c) input
2. 2.True or false: sorting the scores is processing. (a) True (b) False
3. 3.True or false: a buzz (vibration) is processing. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) a result on screen (b) typing your age (c) tapping a button (d) taking a photo
5. 5.Which of these is an input? (a) working out a tip (b) tapping a button (c) a pop-up message (d) a beep sound
6. 6.🔍 Which is the odd one out? (a) typing your age (b) checking a password (c) working out a tip (d) sorting the scores
7. 7.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) input (c) output
8. 8.⚙️ 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 4 (b) line 3 (c) line 2 (d) line 1
9. 9.⚙️ In an app, is sorting the scores an input, processing or an output? (a) processing (b) input (c) output
10. 10.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 430; // typed by the user
    line 2: let off = 50; // 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
11. 11.⚙️ In an app, is checking a password an input, processing or an output? (a) output (b) processing (c) input
12. 12.⚙️ What number does this app show?
    let km = 4; // typed by the user
    let metres = km * 1000;
    show(metres);
13. 13.True or false: a result on screen is an output. (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.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
16. 16.⚙️ What number does this app show?
    let bill = 290; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
17. 17.⚙️ What number does this app show?
    let km = 14; // typed by the user
    let metres = km * 1000;
    show(metres);
18. 18.⚙️ In an app, is speaking a command an input, processing or an output? (a) output (b) input (c) processing
19. 19.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) taking a photo (d) sorting the scores
20. 20.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) working out a tip (d) a pop-up message
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 330; // 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 1 (b) line 2 (c) line 4 (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 = 5; // 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
23. 23.⚙️ What number does this app show?
    let price = 45; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
24. 24.True or false: a pop-up message is an input. (a) True (b) False
25. 25.Which of these is processing? (a) adding up a bill (b) a result on screen (c) a pop-up message (d) a buzz (vibration)
26. 26.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 230; // 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 3 (b) line 1 (c) line 4 (d) line 2
27. 27.⚙️ What number does this app show?
    let price = 320; // typed by the user
    let off = 30; // typed by the user
    let pay = price - off;
    show(pay);
28. 28.True or false: taking a photo is an output. (a) False (b) True
29. 29.Which of these is an output? (a) adding up a bill (b) a beep sound (c) taking a photo (d) working out a tip
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 220; // 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 1 (b) line 4 (c) line 3 (d) line 2
31. 31.Which of these is an input? (a) a buzz (vibration) (b) typing your age (c) a beep sound (d) adding up a bill
32. 32.True or false: speaking a command is processing. (a) True (b) False
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 216; // 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 2 (d) line 1
34. 34.🔍 Which is the odd one out? (a) tapping a button (b) sorting the scores (c) checking a password (d) adding up a bill
35. 35.⚙️ What number does this app show?
    let bill = 55; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);
36. 36.🔍 Which is the odd one out? (a) a pop-up message (b) checking a password (c) a beep sound (d) a result on screen
37. 37.True or false: taking a photo is processing. (a) False (b) True
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 144; // 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 4 (b) line 1 (c) line 3 (d) line 2
39. 39.⚙️ 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 3 (c) line 2
40. 40.⚙️ What number does this app show?
    let km = 15; // typed by the user
    let metres = km * 1000;
    show(metres);

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