App Dev Worksheet: Input, Processing, Output

App development lesson 7: Input, processing and output · Set 324 · 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 result on screen is processing. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) adding up a bill (b) checking a password (c) working out a tip (d) tapping a button
3. 3.True or false: a pop-up message is an output. (a) False (b) True
4. 4.⚙️ In an app, is typing your age an input, processing or an output? (a) input (b) processing (c) output
5. 5.⚙️ In an app, is working out a tip an input, processing or an output? (a) processing (b) input (c) output
6. 6.🔍 Which is the odd one out? (a) sorting the scores (b) taking a photo (c) speaking a command (d) tapping a button
7. 7.⚙️ What number does this app show?
   let price = 200; // typed by the user
   let off = 10; // typed by the user
   let pay = price - off;
   show(pay);
8. 8.True or false: tapping a button is processing. (a) True (b) False
9. 9.⚙️ In an app, is sorting the scores an input, processing or an output? (a) output (b) processing (c) input
10. 10.⚙️ What number does this app show?
    let km = 11; // typed by the user
    let metres = km * 1000;
    show(metres);
11. 11.⚙️ What number does this app show?
    let price = 120; // typed by the user
    let off = 10; // typed by the user
    let pay = price - off;
    show(pay);
12. 12.⚙️ 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 2 (c) line 1
13. 13.Which of these is an input? (a) checking a password (b) a result on screen (c) working out a tip (d) tapping a button
14. 14.Which of these is an input? (a) a result on screen (b) working out a tip (c) speaking a command (d) checking a password
15. 15.🔍 Which is the odd one out? (a) tapping a button (b) speaking a command (c) typing your age (d) adding up a bill
16. 16.True or false: speaking a command is an input. (a) True (b) False
17. 17.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 30; // 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 1 (b) line 2 (c) line 3 (d) line 4
18. 18.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 35; // 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 1 (b) line 3 (c) line 4 (d) line 2
19. 19.⚙️ 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);
20. 20.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 320; // 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 4 (d) line 1
21. 21.⚙️ What number does this app show?
    let km = 8; // typed by the user
    let metres = km * 1000;
    show(metres);
22. 22.⚙️ Which line does the processing (works out the answer)?
    line 1: let price = 55; // 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 2 (c) line 1 (d) line 3
23. 23.⚙️ In an app, is taking a photo an input, processing or an output? (a) output (b) processing (c) input
24. 24.True or false: sorting the scores is processing. (a) False (b) True
25. 25.⚙️ What number does this app show?
    let km = 5; // typed by the user
    let metres = km * 1000;
    show(metres);
26. 26.⚙️ What number does this app show?
    let bill = 44; // typed by the user
    let friends = 4; // typed by the user
    let share = bill / friends;
    show(share);
27. 27.⚙️ What number does this app show?
    let price = 160; // typed by the user
    let off = 20; // typed by the user
    let pay = price - off;
    show(pay);
28. 28.🔍 Which is the odd one out? (a) a beep sound (b) a pop-up message (c) taking a photo (d) a buzz (vibration)
29. 29.⚙️ 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 2 (b) line 3 (c) line 1
30. 30.⚙️ In an app, is tapping a button an input, processing or an output? (a) processing (b) input (c) output
31. 31.⚙️ 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 2 (b) line 1 (c) line 3
32. 32.⚙️ What number does this app show?
    let km = 6; // typed by the user
    let metres = km * 1000;
    show(metres);
33. 33.Which of these is processing? (a) a beep sound (b) a buzz (vibration) (c) a pop-up message (d) checking a password
34. 34.🔍 Which is the odd one out? (a) checking a password (b) adding up a bill (c) typing your age (d) sorting the scores
35. 35.⚙️ In an app, is a result on screen an input, processing or an output? (a) output (b) input (c) processing
36. 36.⚙️ 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);
37. 37.🔍 Which is the odd one out? (a) checking a password (b) a result on screen (c) a buzz (vibration) (d) a beep sound
38. 38.True or false: a pop-up message is processing. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a result on screen (b) speaking a command (c) a buzz (vibration) (d) a pop-up message
40. 40.⚙️ What number does this app show?
    let bill = 305; // typed by the user
    let friends = 5; // typed by the user
    let share = bill / friends;
    show(share);

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