App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 122 · 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 a pop-up message an input, processing or an output? (a) input (b) processing (c) output
2. 2.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
3. 3.⚙️ 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);
4. 4.🔍 Which is the odd one out? (a) typing your age (b) working out a tip (c) sorting the scores (d) checking a password
5. 5.⚙️ What number does this app show?
   let price = 95; // typed by the user
   let qty = 4; // typed by the user
   let total = price * qty;
   show(total);
6. 6.Which of these is an input? (a) checking a password (b) adding up a bill (c) tapping a button (d) working out a tip
7. 7.⚙️ Which line does the processing (works out the answer)?
   line 1: let price = 75; // 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 4 (b) line 3 (c) line 2 (d) line 1
8. 8.⚙️ In an app, is a result on screen an input, processing or an output? (a) processing (b) input (c) output
9. 9.Which of these is an output? (a) adding up a bill (b) a beep sound (c) taking a photo (d) speaking a command
10. 10.⚙️ What number does this app show?
    let bill = 108; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);
11. 11.⚙️ What number does this app show?
    let km = 10; // typed by the user
    let metres = km * 1000;
    show(metres);
12. 12.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 84; // 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 2 (c) line 3 (d) line 1
13. 13.True or false: sorting the scores is an output. (a) True (b) False
14. 14.⚙️ What number does this app show?
    let price = 220; // typed by the user
    let off = 50; // typed by the user
    let pay = price - off;
    show(pay);
15. 15.Which of these is processing? (a) tapping a button (b) a pop-up message (c) sorting the scores (d) typing your age
16. 16.🔍 Which is the odd one out? (a) tapping a button (b) a beep sound (c) a pop-up message (d) a result on screen
17. 17.Which of these is processing? (a) speaking a command (b) a beep sound (c) typing your age (d) working out a tip
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let bill = 380; // 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 3 (d) line 1
19. 19.⚙️ What number does this app show?
    let price = 140; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let km = 14; // typed by the user
    line 2: let metres = km * 1000;
    line 3: show(metres); (a) line 3 (b) line 2 (c) line 1
21. 21.⚙️ What number does this app show?
    let price = 50; // typed by the user
    let qty = 2; // 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) processing (b) input (c) output
23. 23.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
24. 24.True or false: a pop-up message is an output. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) typing your age (b) tapping a button (c) taking a photo (d) adding up a bill
26. 26.🔍 Which is the odd one out? (a) a buzz (vibration) (b) working out a tip (c) checking a password (d) sorting the scores
27. 27.Which of these is an input? (a) speaking a command (b) a beep sound (c) sorting the scores (d) a result on screen
28. 28.True or false: a buzz (vibration) is an output. (a) False (b) True
29. 29.⚙️ What number does this app show?
    let bill = 72; // typed by the user
    let friends = 2; // typed by the user
    let share = bill / friends;
    show(share);
30. 30.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 1 (b) line 4 (c) line 2 (d) line 3
31. 31.True or false: tapping a button is an output. (a) False (b) True
32. 32.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 85; // 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 2 (b) line 4 (c) line 1 (d) line 3
33. 33.🔍 Which is the odd one out? (a) a beep sound (b) a result on screen (c) checking a password (d) a buzz (vibration)
34. 34.⚙️ In an app, is speaking a command an input, processing or an output? (a) input (b) output (c) processing
35. 35.⚙️ In an app, is adding up a bill an input, processing or an output? (a) input (b) output (c) processing
36. 36.⚙️ What number does this app show?
    let price = 15; // typed by the user
    let qty = 6; // typed by the user
    let total = price * qty;
    show(total);
37. 37.Which of these is an output? (a) sorting the scores (b) adding up a bill (c) a pop-up message (d) speaking a command
38. 38.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 65; // 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 2 (c) line 1 (d) line 4
39. 39.🔍 Which is the odd one out? (a) sorting the scores (b) checking a password (c) working out a tip (d) a result on screen
40. 40.⚙️ What number does this app show?
    let bill = 129; // typed by the user
    let friends = 3; // typed by the user
    let share = bill / friends;
    show(share);

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