App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 768 · 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 output? (a) sorting the scores (b) a result on screen (c) adding up a bill (d) typing your age
2. 2.⚙️ In an app, is checking a password an input, processing or an output? (a) input (b) output (c) processing
3. 3.⚙️ What number does this app show?
   let price = 45; // typed by the user
   let qty = 5; // typed by the user
   let total = price * qty;
   show(total);
4. 4.🔍 Which is the odd one out? (a) a pop-up message (b) tapping a button (c) speaking a command (d) typing your age
5. 5.⚙️ 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
6. 6.⚙️ In an app, is taking a photo an input, processing or an output? (a) processing (b) input (c) output
7. 7.⚙️ 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 1 (b) line 3 (c) line 2
8. 8.🔍 Which is the odd one out? (a) taking a photo (b) typing your age (c) adding up a bill (d) tapping a button
9. 9.⚙️ Which line does the processing (works out the answer)?
   line 1: let km = 9; // typed by the user
   line 2: let metres = km * 1000;
   line 3: show(metres); (a) line 1 (b) line 2 (c) line 3
10. 10.⚙️ What number does this app show?
    let bill = 51; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
11. 11.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) output (c) processing
12. 12.⚙️ What number does this app show?
    let price = 20; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
13. 13.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 10; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 2 (b) line 1 (c) line 3
14. 14.Which of these is an output? (a) a pop-up message (b) sorting the scores (c) working out a tip (d) checking a password
15. 15.Which of these is an output? (a) taking a photo (b) a beep sound (c) speaking a command (d) adding up a bill
16. 16.🔍 Which is the odd one out? (a) working out a tip (b) tapping a button (c) taking a photo (d) typing your age
17. 17.🔍 Which is the odd one out? (a) typing your age (b) speaking a command (c) checking a password (d) taking a photo
18. 18.🔍 Which is the odd one out? (a) a beep sound (b) a buzz (vibration) (c) taking a photo (d) a pop-up message
19. 19.⚙️ 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);
20. 20.⚙️ What number does this app show?
    let bill = 171; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
21. 21.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 55; // 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 2 (c) line 1 (d) line 3
22. 22.Which of these is an input? (a) adding up a bill (b) typing your age (c) a result on screen (d) sorting the scores
23. 23.True or false: speaking a command is an input. (a) False (b) True
24. 24.⚙️ In an app, is a beep sound an input, processing or an output? (a) processing (b) input (c) output
25. 25.⚙️ In an app, is a buzz (vibration) an input, processing or an output? (a) input (b) output (c) processing
26. 26.⚙️ In an app, is adding up a bill an input, processing or an output? (a) output (b) input (c) processing
27. 27.Which of these is processing? (a) taking a photo (b) typing your age (c) a buzz (vibration) (d) working out a tip
28. 28.⚙️ What number does this app show?
    let bill = 42; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
29. 29.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 12; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 1 (c) line 2
30. 30.🔍 Which is the odd one out? (a) sorting the scores (b) speaking a command (c) tapping a button (d) taking a photo
31. 31.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 90; // 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 2 (b) line 1 (c) line 3 (d) line 4
32. 32.⚙️ What number does this app show?
    let price = 210; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
33. 33.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 10; // 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 3 (c) line 4 (d) line 1
34. 34.⚙️ What number does this app show?
    let price = 35; // typed by the user
    let qty = 3; // typed by the user
    let total = price * qty;
    show(total);
35. 35.True or false: checking a password is an input. (a) False (b) True
36. 36.True or false: sorting the scores is an input. (a) True (b) False
37. 37.True or false: a result on screen is an input. (a) False (b) True
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 75; // 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 3 (c) line 1 (d) line 2
39. 39.True or false: taking a photo is processing. (a) True (b) False
40. 40.True or false: taking a photo is an output. (a) False (b) True

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